Mineralization composition as well as preparation method and application thereof

Abstract

The invention provides a mineralization composition as well as a preparation method and application thereof. The mineralization composition comprises modified celestite, modified strontium-containing dolomite, modified medical stone, modified zeolite, modified tourmaline, modified wollastonite and modified serpentine. The strontium ion dissolution amount of the modified celestite is 50 to 55 mg / L; the strontium ion dissolution amount of the modified strontium-containing dolomite is 15 to 20 mg / L; the metasilicate ion dissolution amount of the modified medical stone is 30 to 35 mg / L; the metasilicate ion dissolution amount of the modified zeolite is 40 to 45 mg / L; the metasilicate ion dissolution amount of the modified tourmaline is 3 to 5 mg / L; the dissolution amount of metasilicate ions in the modified wollastonite is 3 to 5 mg / L; the dissolution amount of metasilicate ions in the modified serpentine is 10 to 15 mg / L. The mineralization composition can stably and enduringly release strontium ions and metasilicate ions, and also can adjust the water quality to alkalescence, so that the water quality reaches the national drinking water standard, and safe and healthy drinking water can be provided for users.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of drinking water mineralization materials, in particular to a mineralization composition and a preparation method and application thereof. BACKGROUND

[0002] In recent years, water resource shortage and water pollution have become important factors affecting social and economic development and people's living standards. In order to solve the above problems, various water treatment technologies have developed rapidly, and desalination technologies such as reverse osmosis, electrodialysis, distillation, ion exchange resin have emerged in an endless stream, and have been widely used in household water treatment equipment such as water purifiers, and have entered thousands of households. The existing reverse osmosis technology can efficiently remove harmful substances (such as heavy metals, bacteria, organic matter, etc.) in water, but at the same time, it also removes the beneficial mineral elements in natural water to the human body, such as metasilicic acid and strontium. Among them, metasilicic acid can promote bone development and enhance blood vessel elasticity, and is closely related to human anti-aging and cardiovascular health; and strontium can participate in calcium metabolism, prevent osteoporosis, and has antioxidant function.

[0003] The World Health Organization (WHO) pointed out in the "Guidelines for Drinking Water Quality" that drinking water should retain or supplement appropriate amount of minerals to meet the needs of the human body. Moreover, some studies have shown that alkaline water may reduce the symptoms of gastroesophageal reflux. Therefore, the development of mineralization technology that can selectively supplement metasilicic acid and strontium and adjust the alkalinity of pure water has become an important research direction in the water purification field.

[0004] At present, in order to increase the content of metasilicic acid and strontium in pure water, natural mineral soaking method is generally used, such as using natural materials such as maifanite, coral sand, silicate ore, etc. to release minerals through water flow scouring, but the metasilicic acid release amount of this method is unstable, and the strontium content is generally low, and there is also the problem of short release period of metasilicic acid and strontium.

[0005] Therefore, how to increase the content of metasilicic acid and strontium in water while considering the long release period of metasilicic acid and strontium is a technical problem to be solved by those skilled in the art. SUMMARY

[0006] The present invention provides a mineralization composition, a preparation method and an application thereof. The mineralization composition comprises modified celestite, modified strontium-containing dolomite, modified medical stone, modified zeolite, modified tourmaline, modified wollastonite and modified serpentine, wherein the strontium ion precipitation amount of the modified celestite is 50-55 mg / L; the strontium ion precipitation amount of the modified strontium-containing dolomite is 15-20 mg / L; the metasilicate ion precipitation amount of the modified medical stone is 30-35 mg / L; the metasilicate ion precipitation amount of the modified zeolite is 40-45 mg / L; the metasilicate ion precipitation amount of the modified tourmaline is 3-5 mg / L; the metasilicate ion precipitation amount of the modified wollastonite is 3-5 mg / L; and the metasilicate ion precipitation amount of the modified serpentine is 10-15 mg / L. The mineralization composition can increase the content of metasilicic acid and strontium in water and has stable dissolution ability. At the same time, the water treated with the mineralization composition can be maintained in a weak alkaline range.

[0007] In a first aspect, the present invention provides a mineralized composition comprising: modified celestite, modified strontium-containing dolomite, modified medical stone, modified zeolite, modified tourmaline, modified wollastonite, and modified serpentine;

[0008] The strontium ion precipitation amount of the modified celestite is 50-55 mg / L;

[0009] The strontium ion precipitation amount of the modified strontium-containing dolomite is 15-20 mg / L;

[0010] The metasilicate ion precipitation amount of the modified medical stone is 30-35 mg / L;

[0011] The metasilicate ion precipitation amount of the modified zeolite is 40-45 mg / L;

[0012] The metasilicate ion precipitation amount of the modified tourmaline is 3-5 mg / L;

[0013] The metasilicate ion precipitation amount of the modified wollastonite is 3-5 mg / L;

[0014] The metasilicate ion precipitation amount of the modified serpentine is 10-15 mg / L.

[0015] In one possible embodiment, the particle size of the modified celestite is 300-350 mesh;

[0016] The particle size of the modified strontium-containing dolomite is 300-350 mesh;

[0017] The particle size of the modified medical stone is 300-350 mesh;

[0018] The particle size of the modified zeolite is 300-350 mesh;

[0019] the particle size of the modified tourmaline is 300-350 mesh;

[0020] the particle size of the modified wollastonite is 80-100 mesh;

[0021] the particle size of the modified serpentine is 300-350 mesh.

[0022] In a possible implementation, the modified celestite is prepared by a method comprising the following process: acid treatment on a celestite raw material to obtain the modified celestite;

[0023] And / or, the modified strontium-containing dolomite is prepared by a method comprising the following process: calcination treatment on a strontium-containing dolomite raw material to obtain the modified strontium-containing dolomite;

[0024] And / or, the modified maifanite is prepared by a method comprising the following process: calcination treatment and acid treatment on a maifanite raw material to obtain the modified maifanite;

[0025] And / or, the modified zeolite is prepared by a method comprising the following process: calcination treatment and salt treatment on a zeolite raw material to obtain the modified zeolite;

[0026] And / or, the modified tourmaline is prepared by a method comprising the following process: calcination treatment on a tourmaline raw material to obtain the modified tourmaline;

[0027] And / or, the modified wollastonite is prepared by a method comprising the following process: mechanical treatment on a wollastonite raw material to obtain the modified wollastonite;

[0028] And / or, the modified serpentine is prepared by a method comprising the following process: calcination treatment on a serpentine raw material to obtain the modified serpentine.

[0029] In a possible implementation, the acid treatment comprises: after mixing the mineral to be acid treated with an acidic aqueous solution, soaking at 20-35°C for 0.5-4h; the mass molar ratio of hydrogen ions contained in the acidic aqueous solution to the mineral to be acid treated is 1g:0.015-0.03mol;

[0030] And / or, the calcination treatment comprises: placing the mineral to be calcined at 150-700°C for 1-3h;

[0031] And / or, the salt treatment comprises: after mixing the mineral to be salt treated with a salt aqueous solution, oscillating for 2-24h; the mass molar ratio of alkali metal cations contained in the salt aqueous solution to the mineral to be salt treated is 1g:0.01-0.015mol;

[0032] And / or, the mechanical treatment includes: crushing, grinding, and screening.

[0033] In one possible embodiment, the acidic aqueous solution includes a citric acid aqueous solution;

[0034] Preferably, the concentration of the citric acid aqueous solution is 0.25-0.5 mol / L;

[0035] and / or, the saline solution comprises an aqueous sodium chloride solution;

[0036] Preferably, the concentration of the sodium chloride aqueous solution is 0.1-1.5 mol / L.

[0037] In one possible embodiment, the composition comprises, by weight: 1.5-10 parts of modified celestite, 0.5-4.0 parts of modified strontium-containing dolomite, 15-20 parts of modified medical stone, 15-22 parts of modified zeolite, 7-15 parts of modified tourmaline, 1-4 parts of modified wollastonite and 2-4 parts of modified serpentine.

[0038] In one possible embodiment, the composition comprises, by weight: 6-10 parts of modified celestite, 2-4 parts of modified strontium-containing dolomite, 15-18 parts of modified medical stone, 15-20 parts of modified zeolite, 7-10 parts of modified tourmaline, 2-4 parts of modified wollastonite and 2-4 parts of modified serpentine;

[0039] Or, 1.5-4 parts of modified celestite, 0.5-1 part of modified strontium-containing dolomite, 15-20 parts of modified medical stone, 20-22 parts of modified zeolite, 10-15 parts of modified tourmaline, 1-4 parts of modified wollastonite and 2-4 parts of modified serpentine.

[0040] In a second aspect, the present invention provides a mineralized filter element comprising the mineralized composition described above.

[0041] In a possible implementation, the mineralized filter element includes, in terms of mass percentage, 20-30% of the mineralized composition, 40-45% of the binder, and 30-35% of the activated carbon.

[0042] In a third aspect, the present invention provides a water purifier, comprising: the above-mentioned mineralized composition or the above-mentioned mineralized filter element.

[0043] The present invention provides a mineralized composition, a preparation method and an application thereof. By selecting modified celestite, modified strontium-containing dolomite, modified medical stone, modified zeolite, modified tourmaline, modified wollastonite and modified serpentine, the mineralized composition can increase the content of metasilicic acid and strontium in water, has good dissolution durability, and can also adjust the water to be weakly alkaline. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1A preparation flowchart of the mineralization filter element provided by the present application is shown. DETAILED DESCRIPTION

[0045] The exemplary embodiments will be described in detail herein with reference to the drawings. Descriptions of well-known functions and constructions can be omitted to provide a more clear and concise description of the embodiments. The following description is presented with reference to the accompanying drawings, wherein like reference numerals are used to refer to like elements throughout.

[0046] The technical solutions of the present application and how the technical solutions solve the above technical problems will be described in detail below with specific examples. The following specific examples can be combined with each other, and the same or similar concepts or processes can not be described again in some examples. The embodiments of the present application will be described below with reference to the accompanying drawings.

[0047] In the prior art, in order to increase the content of metasilicic acid and strontium in pure water, the mineralization material used has the problems of low release amount of metasilicic acid ions and strontium ions and short release period.

[0048] The mineralization composition provided by the present application comprises modified celestite, modified strontium-containing dolomite, modified medical stone, modified zeolite, modified tourmaline, modified wollastonite and modified serpentine. The strontium ion dissolution amount of the modified celestite is 50-55 mg / L; the strontium ion dissolution amount of the modified strontium-containing dolomite is 15-20 mg / L; the metasilicic acid ion dissolution amount of the modified medical stone is 30-35 mg / L; the metasilicic acid ion dissolution amount of the modified zeolite is 40-45 mg / L; the metasilicic acid ion dissolution amount of the modified tourmaline is 3-5 mg / L; the metasilicic acid ion dissolution amount of the modified wollastonite is 3-5 mg / L; and the metasilicic acid ion dissolution amount of the modified serpentine is 10-15 mg / L.

[0049] Specifically, the components in the composition of the present application are all modified minerals, which have excellent performance in increasing the content of metasilicic acid and strontium in pure water and adjusting the water to be weakly alkaline. In a specific embodiment, the detection method of the dissolution amount of each modified mineral comprises: taking 2 g of each of the above modified minerals, respectively, and placing them in distilled water at room temperature for 24 h, and then measuring.

[0050] Since the mineralization composition of the present application comprises the above modified minerals with excellent metasilicic acid ion and strontium ion dissolution performance, the mineralization composition of the present application has good strontium ion and / or metasilicic acid ion dissolution capacity in water, solving the problems of low content of metasilicic acid and strontium in mineralized water and short release period of metasilicic acid and strontium.

[0051] The inventors found through the static leaching test that the leaching amount of metasilicate ions and / or strontium ions of each of the modified minerals described above tends to increase with the increase of the mesh number, i.e. the finer the powder, the higher the leaching amount of metasilicate ions and / or strontium ions. However, considering that if the powder is too fine to make a filter core, the binder can block the pores of the modified mineral, resulting in a decrease in the leaching performance, in the present application, the particle size of the modified celestite is 300-350 mesh; the particle size of the modified strontium-containing dolomite is 300-350 mesh; the particle size of the modified geyserite is 300-350 mesh; the particle size of the modified zeolite is 300-350 mesh; the particle size of the modified tourmaline is 300-350 mesh; the particle size of the modified wollastonite is 80-100 mesh; and the particle size of the modified serpentine is 300-350 mesh. Since the leaching performance of the modified wollastonite decreases with the increase of the mesh number in the leaching test, the particle size of the modified wollastonite is between 80-100 mesh.

[0052] The present application does not limit the preparation method of the aforementioned modified minerals, as long as the heavy metal ions in the raw materials of each mineral can be removed to meet the drinking water hygiene and safety standards, while having the aforementioned limited leaching amount, and being able to adjust the alkalinity and hardness of water.

[0053] Exemplarily, the modified celestite is prepared by a method comprising the following process: acid treatment of a celestite raw material to obtain the modified celestite.

[0054] Since the main component of celestite is SrSO4, celestite contains rich mineral components such as strontium, barium, silicon, calcium, magnesium, etc., which play an important role in human health. Therefore, the present application modifies it as a raw material to serve as one of the components of the mineralization composition, and is used as a natural mineral supplement to increase the content of minerals in drinking water. Exemplarily, when selecting the celestite raw material, celestite with a strontium mass fraction of not less than 30% is selected.

[0055] The above acid treatment refers to soaking the celestite raw material with an acidic solution. During the soaking process, the acidic solution can dissolve part of the impurities in the micropores of the celestite, while the smaller radius H + Can replace the larger Ca 2 + , Al 3+ , Fe 3+ , etc. in the mineral channels, thereby increasing the volume of the celestite channels, improving the adsorption capacity and leaching capacity of the celestite, and ultimately obtaining the modified celestite with significantly improved strontium ion leaching amount.

[0056] Further, before the acid treatment, the celestite raw material is subjected to cleaning, drying, crushing and other treatments, and then the celestite raw material with a suitable particle size (for example, 300-350 mesh) is selected for acid treatment.

[0057] It can be understood that by further limiting the ratio of the celestite raw material to the acidic aqueous solution, the soaking temperature, the soaking time and other conditions, the modified celestite with a strontium ion dissolution amount of 50-55 mg / L can be obtained. In a specific embodiment, the acid treatment of the celestite raw material comprises: mixing the celestite raw material with the acidic aqueous solution, and then soaking at 20-35℃ for 0.5-4h, and the mass molar ratio of the celestite raw material to the hydrogen ions contained in the acidic aqueous solution is 1g:0.015-0.03mol.

[0058] After the acid treatment, the modified celestite is obtained by subjecting the acid treatment product to filtration, washing, drying and other post-treatments.

[0059] For example, the modified strontium-containing dolomite is prepared by a method comprising the following process: subjecting the strontium-containing dolomite raw material to calcination treatment to obtain the modified strontium-containing dolomite.

[0060] Since the strontium-containing dolomite can precipitate strontium, calcium and magnesium elements, these minerals have a positive promoting effect on human health. Therefore, the present application modifies it as a raw material to be used as one of the components of the mineralization composition to increase the content of minerals in drinking water.

[0061] The above-mentioned calcination treatment refers to high-temperature calcination of the strontium-containing dolomite raw material. During the calcination process, SrCO3 or CaCO3 in the strontium-containing dolomite can be activated and decomposed to form MgO and CaO. MgO and CaO will quickly dissolve in the subsequent water treatment process, further destroy the structure of residual SrCO3, promote the release of strontium ions, and ultimately obtain a modified strontium-containing dolomite with significantly improved strontium ion dissolution amount.

[0062] Further, before the calcination treatment, the strontium-containing dolomite raw material is subjected to cleaning, drying, crushing and other treatments, and then the strontium-containing dolomite raw material with a suitable particle size (for example, 300-350 mesh) is selected for calcination treatment.

[0063] Since the CaO and MgO can react with other minerals (such as silicates) to form stable calcium / magnesium silicate phases that encapsulate strontium, which in turn inhibits leaching, it is understood that by further defining the calcination temperature and time of the strontium-containing dolomite raw material, a modified strontium-containing dolomite can be obtained that has a strontium ion leaching amount of 15-20 mg / L. In one embodiment, the calcination treatment of the strontium-containing dolomite raw material includes calcining the strontium-containing dolomite raw material at a temperature of 300-700 °C for a time of 1.0-1.5 h. At this temperature, cracks and pores can also appear on the surface of the strontium-containing dolomite, making the strontium ions more accessible to water in subsequent pure water mineralization applications, thereby achieving a high leaching amount.

[0064] After the calcination treatment, the modified strontium-containing dolomite is obtained by cooling and other post-treatments of the calcination treatment product.

[0065] For example, the modified maifanite is prepared by a method including the following processes: calcination treatment and acid treatment of the maifanite raw material to obtain the modified maifanite.

[0066] Maifanite can not only leach Fe, Mn, Sr, Se, Cu and Zn and other trace elements required by the human body in water, but also remove Cd, Pb, Hg and As and other heavy metal pollutants harmful to the human body, and has a two-way adjustment on the pH value of the water body. Therefore, the maifanite is modified as a raw material to be used as one of the components of the mineralization composition for increasing the content of minerals in drinking water and adjusting the alkalinity of water. For example, when selecting the maifanite raw material, maifanite with a SiO2 mass fraction of not less than 30% is selected.

[0067] The above-mentioned calcination treatment and acid treatment refer to high-temperature calcination of the maifanite raw material, and then soaking the calcined maifanite in an acidic solution. In the calcination process, the adsorbed water and organic matter in the maifanite are removed, and appropriate calcination temperature can cause internal dehydroxylation, slightly expand the interlayer structure of the silicate layer, form micro-cracks and pores, increase the specific surface area and reactivity of the maifanite, and make the liquid more easily penetrate and the metasilicate ions in the maifanite more easily leach out. In the soaking process, the acidic solution can dissolve the metal ions such as Ca 2+ , Mg 2+ , Fe 3+ , etc. in the calcined maifanite through ion exchange reaction, destroy the crystal structure of the silicate, release free silicate (SiO32-), and further combine with H + to generate soluble metasilicic acid (H2SiO3). In addition, the strong penetration and corrosion of the acidic solution can further expand the pores formed after calcination of the maifanite, accelerate the dissociation process of the silicate, significantly improve the leaching rate and total amount of the metasilicate ions, and finally obtain a modified maifanite with significantly improved metasilicate ion leaching amount.

[0068] Further, the process further comprises washing, drying, and crushing the original material of the medical stone before the calcination process, and then selecting the medical stone with a proper particle size (e.g. 300-350 mesh) for the calcination process and the acid treatment.

[0069] It can be understood that by further limiting the calcination temperature, the calcination time, the ratio of the calcined medical stone and the acid aqueous solution, the soaking temperature, and the soaking time, the modified medical stone with a silicate ion dissolution amount of 30-35 mg / L can be obtained. In a specific embodiment, the calcination process and the acid treatment of the original material of the medical stone comprises: placing the original material of the medical stone in a calcination furnace at 100-300 ℃ for 2-3 h; and then mixing the calcined and cooled medical stone with the acid aqueous solution, and soaking at 20-35 ℃ for 4-5 h, wherein the mass molar ratio of the hydrogen ions in the acid aqueous solution to the calcined medical stone is 1 g:0.015-0.03 mol, such as 1 g:0.015 mol, 1 g:0.017 mol, 1 g:0.02 mol, 1 g:0.025 mol, 1 g:0.03 mol, etc.

[0070] After the acid treatment, the modified medical stone can be obtained by performing post-treatment such as suction filtration, washing, and drying on the acid treatment product.

[0071] For example, the modified zeolite is prepared by a method comprising: performing a calcination process and a salt treatment on the original material of the zeolite to obtain the modified zeolite.

[0072] The zeolite is a natural silicate mineral, which contains a large number of pore structures, and can not only release metasilicic acid, but also adsorb heavy metal ions in water. Therefore, the original material of the zeolite is modified as a raw material to be used as one of the components of the mineralization composition, and is used to increase the content of metasilicic acid in drinking water and remove heavy metal ions. For example, when selecting the original material of the zeolite, the zeolite with a SiO2 mass fraction of not less than 30% is selected.

[0073] The calcination process and the salt treatment refer to that after high-temperature calcination of the original material of the zeolite, the calcined zeolite is added into a salt aqueous solution for oscillation. During the calcination process, the adsorbed water and organic matter in the zeolite are removed, and the internal silicate-aluminate framework is destroyed, and the Si-O bond therein is more likely to form metasilicic acid ions. At the same time, the surface liquid of the zeolite forms an unsaturated AlO4- coordination, which enhances the electrostatic repulsion between the particles. Therefore, after the calcination process of the zeolite, the salt solution oscillation treatment is performed to balance the surface negative ions by Na + and other cations, and replace Ca 2+ , Mg 2+The ions in the zeolite are increased, which makes the metasilicate ions more easily released. Moreover, in the salt solution, the Si-O bonds in the zeolite framework are more easily hydrolyzed to form soluble metasilicic acid (H2SiO3), and finally the modified zeolite with significantly improved metasilicate ion dissolution is obtained.

[0074] Further, before the calcination treatment, the zeolite raw material is subjected to cleaning, drying, crushing and other treatments, and then the zeolite raw material with a suitable particle size (for example, 300-350 mesh) is selected for calcination treatment and salt treatment.

[0075] It can be understood that by further limiting the calcination temperature, calcination time, ratio of zeolite to salt aqueous solution after calcination, oscillation temperature, oscillation time and other conditions of the zeolite raw material, the modified zeolite with a metasilicate ion dissolution of 40-45 mg / L can be obtained. In a specific embodiment, the calcination treatment and salt treatment of the zeolite raw material include: calcining the zeolite at 100-300°C for 1-2h, and cooling; placing the calcined zeolite in a salt aqueous solution and oscillating for 24h, and the mass molar ratio of the calcined zeolite to the alkali metal cations contained in the salt aqueous solution is 1g:0.01-0.015mol, for example, 1g:0.01mol, 1g:0.011mol, 1g:0.012mol, 1g:0.013mol, 1g:0.014mol, 1g:0.015mol, etc.

[0076] After the salt treatment is completed, the modified zeolite is obtained by subjecting the salt treatment product to post-treatment such as suction filtration, washing and drying.

[0077] For example, the modified tourmaline is prepared by a method comprising the following process: subjecting the tourmaline raw material to calcination treatment to obtain the modified tourmaline.

[0078] Tourmaline is an aluminum, sodium, iron, magnesium, lithium ring structure silicate mineral characterized by containing boron, which can release metasilicic acid and negative ions at the same time, increase the permeability of water, and promote the dissolution of other minerals. Considering that the amount of metasilicate ions that can be dissolved from tourmaline itself is very low, the present application modifies it as a raw material to be used as one of the components of the mineralization composition, which is used to promote the dissolution of metasilicate ions and / or strontium ions in other components, and to adjust the alkalinity of water. For example, when selecting the tourmaline raw material, tourmaline with a SiO2 mass fraction of not less than 40% is selected.

[0079] The calcination treatment refers to high-temperature calcination of tourmaline raw materials. In the calcination process, the micropore structure and surface defects inside the tourmaline increase, the hydrolysis activity is improved, and the internal metasilicate ions are more easily dissolved in water. Moreover, the calcined tourmaline activates its own hydroxyl groups while also decomposing the internal structure water into new hydroxyl groups, releasing more negative ions and increasing the permeability of the treated water, thereby promoting the dissolution effect of other modified minerals in the mineralization composition and achieving alkaline adjustment of the water. Ultimately, the modified tourmaline has an increased metasilicate ion dissolution amount and can promote the release of target mineral ions from other minerals.

[0080] Further, before the calcination treatment, the tourmaline raw materials are subjected to cleaning, drying, crushing, and other treatments, and then tourmaline raw materials with suitable particle sizes (for example, 300-350 mesh) are selected for calcination treatment.

[0081] It can be understood that by further limiting the calcination temperature and calcination time of the tourmaline raw material, a modified tourmaline with a metasilicate ion dissolution amount of 3-5 mg / L can be obtained. In a specific embodiment, the calcination treatment of the tourmaline raw material includes calcining the tourmaline at 200-400°C for 1-2 h, cooling, and obtaining the modified tourmaline.

[0082] For example, the modified wollastonite is prepared by a method comprising the following process: mechanically treating wollastonite raw materials to obtain the modified wollastonite.

[0083] Wollastonite is a chain metasilicate, and its main component is calcium silicate, which can release metasilicic acid in water. Considering that the amount of metasilicate ions dissolved by wollastonite itself is very low, but the dissolution amount of metasilicate ions increases over time, the present application modifies it as a raw material to be used as one of the components of the mineralization composition, which is used to supplement the content of metasilicic acid in drinking water.

[0084] The mechanical treatment refers to cleaning, drying, crushing, grinding, and sieving of the wollastonite raw materials, and wollastonite with a suitable particle size (for example, 80-120 mesh) is selected, and finally a modified wollastonite with a metasilicate ion dissolution amount of 3-5 mg / L is obtained.

[0085] For example, the modified serpentine is prepared by a method comprising the following process: calcining serpentine raw materials to obtain the modified serpentine.

[0086] The crystal structure of serpentine is a triakisdodecahedron, composed of magnesium hydroxide octahedral layers and silicon oxygen tetrahedral layers, and there are unsaturated Si-O-Si, O-Si-O bonds and magnesium bonds inside, which have high chemical activity and can release metasilicic acid in water, effectively adsorb Cd 2+ , Cu2+ Fe 3+ Pb 2+ plasma, and removing F- and other harmful elements in drinking water. Therefore, the present application modifies the serpentine raw material as a raw material to be used as one of the components of the mineralization composition for increasing the content of minerals in drinking water and adsorbing harmful elements in water. For example, when selecting the serpentine raw material, serpentine with a mass fraction of SiO2 not less than 40% is selected.

[0087] The calcination treatment refers to high-temperature calcination of the serpentine raw material. During the calcination process, the specific surface area of the serpentine increases, the pore structure is optimized, more metasilicate ions can be dissolved, and more heavy metal ions can be adsorbed, so that the modified serpentine with improved metasilicate ion dissolution is obtained.

[0088] Further, before the calcination treatment, the serpentine raw material is subjected to cleaning, drying, crushing and other treatments, and then the serpentine raw material with a suitable particle size (for example, 300-350 mesh) is selected for calcination treatment.

[0089] It can be understood that by further limiting the calcination temperature and calcination time of the serpentine raw material, the modified serpentine with a metasilicate ion dissolution of 10-15 mg / L can be obtained. In a specific embodiment, the calcination treatment of the serpentine raw material includes calcining the serpentine raw material at 200-400°C for 3-4h.

[0090] Based on the requirements of health and safety standards, when performing the above acid treatment, citric acid aqueous solution can be selected as the acidic aqueous solution in the acid treatment. Considering the influence of the concentration of the acidic aqueous solution on the diffusion mass transfer effect in the solution and the consumption cost of the raw material in industrial manufacturing scale, the concentration of the citric acid aqueous solution used in the present application is 0.25-0.5mol / L, for example, 0.25mol / L, 0.3mol / L, 0.35mol / L, 0.4mol / L, 0.45mol / L, 0.5mol / L, etc.

[0091] Based on the inhibitory effect of ionic strength on the polymerization of silicic acid, when performing the above salt treatment, NaCl aqueous solution can be selected as the salt aqueous solution in the salt treatment, preferably, the concentration of the NaCl aqueous solution is 0.1-1.5mol / L, for example, 0.1mol / L, 0.3mol / L, 0.5mol / L, 0.8mol / L, 1.0mol / L, 1.2mol / L, 1.5mol / L, etc.

[0092] In the mixing of the modified lapis lazuli, modified strontium-containing dolomite, modified geyserite, modified zeolite, modified tourmaline, modified wollastonite and modified serpentine to prepare the mineralization composition, considering that the modified lapis lazuli and the modified strontium-containing dolomite have strong strontium ion dissolution capacity, the modified geyserite and the modified zeolite have strong metasilicate ion dissolution capacity, the amount of the modified lapis lazuli, the modified strontium-containing dolomite, the modified geyserite and the modified zeolite is relatively high. Although the modified tourmaline also has a large amount of metasilicate ion dissolution, in general, too much metasilicate ion may make the water show strong alkalinity, therefore, the content of the modified tourmaline in the mineralization composition is relatively low compared with the content of the modified geyserite and the modified zeolite. In combination with the role of the modified serpentine and the modified wollastonite in continuously supplementing metasilicate ions in the later period, the mineralization composition provided by the application includes, by weight, 1.5-10 parts of modified lapis lazuli, 0.5-4.0 parts of modified strontium-containing dolomite, 15-20 parts of modified geyserite, 15-22 parts of modified zeolite, 7-15 parts of modified tourmaline, 1-4 parts of modified wollastonite and 2-4 parts of modified serpentine.

[0093] The modified ores are divided into metasilicate-containing minerals and strontium-containing minerals according to the types of dissolved ions, wherein the metasilicate-containing minerals include the modified geyserite, the modified zeolite, the modified wollastonite, the modified tourmaline and the modified serpentine, and the strontium-containing minerals include the modified lapis lazuli and the modified strontium-containing dolomite. Since the metasilicate-containing minerals exist in amorphous form, they can release a large amount of metasilicate ions in water in a short period of time, while the strontium-containing minerals are mostly crystal structures, and their strontium ion release rate is relatively slow. If the proportion of the metasilicate-containing minerals is too high, it may lead to excessive release of metasilicate ions in the initial period of the mineralization composition and attenuation in the later period, shortening the effective period of the mineralization filter element. Increasing the proportion of the strontium-containing minerals can prolong the release sustainability of the mineralization composition, but also avoid insufficient release capacity of strontium ions in the initial period. Therefore, in order to obtain more excellent metasilicate ion and strontium ion dissolution capacity, preferably, the mineralization composition includes 6-10 parts of modified lapis lazuli, 2-4 parts of modified strontium-containing dolomite, 15-18 parts of modified geyserite, 15-20 parts of modified zeolite, 7-10 parts of modified tourmaline, 2-4 parts of modified wollastonite and 2-4 parts of modified serpentine; or the mineralization composition includes 1.5-4 parts of modified lapis lazuli, 0.5-1 part of modified strontium-containing dolomite, 15-20 parts of modified geyserite, 20-22 parts of modified zeolite, 10-15 parts of modified tourmaline, 1-4 parts of modified wollastonite and 2-4 parts of modified serpentine.

[0094] More preferably, the mineralized composition comprises: modified lapis lazuli 10 parts, modified strontium-containing dolomite 3 parts, modified geyserite 15 parts, modified zeolite 15 parts, modified tourmaline 10 parts, modified wollastonite 4 parts and modified serpentine 3 parts; or, modified lapis lazuli 8 parts, modified strontium-containing dolomite 2 parts, modified geyserite 15 parts, modified zeolite 20 parts, modified tourmaline 7 parts, modified wollastonite 4 parts and modified serpentine 4 parts; or, modified lapis lazuli 6 parts, modified strontium-containing dolomite 4 parts, modified geyserite 18 parts, modified zeolite 18 parts, modified tourmaline 10 parts, modified wollastonite 2 parts and modified serpentine 2 parts; or, modified lapis lazuli 4 parts, modified strontium-containing dolomite 1 part, modified geyserite 20 parts, modified zeolite 22 parts, modified tourmaline 10 parts, modified wollastonite 1 part and modified serpentine 2 parts; or, modified lapis lazuli 1.5 parts, modified strontium-containing dolomite 0.5 parts, modified geyserite 15 parts, modified zeolite 20 parts, modified tourmaline 15 parts, modified wollastonite 4 parts and modified serpentine 4 parts.

[0095] The second aspect of the present application also provides a mineralized filter element, which comprises the mineralized composition, a binder and activated carbon. In view of the function of the mineralized filter element in adjusting the alkalinity of water, the activated carbon is preferably non-acid-washed coconut shell activated carbon with a mesh size of 80-325. The binder is preferably ultra-high molecular weight polyethylene with a molecular weight of 3.0 x 10 6 -6.0 x 10 6 g / mol, and specifically, Celanese Gur4120 can be used. In the mineralized filter element, the amount of the binder needs to ensure that the filter element does not disintegrate under high pressure, and also needs to ensure that the activated carbon and the mineralized composition retain sufficient pores to ensure the flow rate of water, and therefore, in the mineralized filter element provided by the present application, the amount of the binder is preferably 40-45% of the total mass of the mineralized filter element. In addition, the main function of the mineralized filter element is to mineralize water, and the adsorption capacity of the activated carbon can be interfered by the surface charge of the mineralized composition, and therefore, the amount of the activated carbon is preferably 30-35% of the total mass of the mineralized filter element, and the amount of the mineralized composition is preferably 20-30% of the total mass of the mineralized filter element.

[0096] In the present application, the preparation method of the mineralized filter element comprises the following steps:

[0097] According to the weight parts, the corresponding parts of modified lapis lazuli, modified dolomite, modified geyserite, modified zeolite, modified wollastonite, modified tourmaline and modified serpentine are prepared respectively, mixed in the order of increasing density, and then stirred and mixed with activated carbon and a binder in sequence. The mixture is filled into a mold, sintered at 180°C for 30 min, hot-pressed and shaped, and then cooled and solidified to obtain the filter element. It should be noted that the preparation method of the mineralized filter element is not limited here, and other preparation methods known to those skilled in the art can also be applicable.

[0098] The third aspect of the present application also provides a water purifier comprising the mineralization composition or the mineralization filter element prepared from the mineralization composition. The water treated by the water purifier has increased concentrations of silicate ions and strontium ions, and the treated water is weakly alkaline; the content of other harmful ions such as heavy metals contained in the water meets the health drinking water standard, and the water purifier can provide healthy domestic drinking water for people.

[0099] The present application will be described in more detail below through specific examples.

[0100] Table 1 shows the sources and specifications of the ores used in the examples.

[0101] Table 1 shows the sources and specifications of the ores used in the examples.

[0102]

[0103]

[0104] The purchased celestite, strontium-containing dolomite, maifanite, zeolite, tourmaline, wollastonite and serpentine were modified according to the following method to obtain modified celestite, modified strontium-containing dolomite, modified maifanite, modified zeolite, modified tourmaline, modified wollastonite and modified serpentine:

[0105] Modified celestite: The celestite was washed with deionized water, dried, crushed, ground, sieved and treated, and the powder particles with a particle size of 300-350 mesh were selected and placed in a 0.25 mol / L citric acid solution for normal temperature stirring and soaking for 0.5 h, with a solid-liquid ratio of 1:40. After washing to neutral, it was placed in an oven for drying at 60°C to obtain modified celestite.

[0106] Modified strontium-containing dolomite: The strontium-containing dolomite was washed with deionized water, dried, crushed, ground, sieved and treated, and the powder particles with a particle size of 300-350 mesh were selected and placed in a muffle furnace for calcination at 350°C for 1.0 h. After cooling, modified strontium-containing dolomite was obtained.

[0107] Modified maifanite: The maifanite was washed with deionized water, dried, crushed, ground, sieved and treated, and the powder particles with a particle size of 300-350 mesh were selected and placed in a muffle furnace for calcination at 150°C for 2 h. Then the calcined maifanite was placed in a 2.5% mass / volume citric acid solution for normal temperature stirring and reaction for 1 h, with a solid-liquid ratio of 1:50. After washing to neutral, it was placed in an oven for drying at 60°C to obtain modified maifanite.

[0108] Modified zeolite: The zeolite was washed with deionized water, dried, crushed, ground, and sieved, and the powder particles with a particle size of 300-350 mesh were selected and placed in a muffle furnace for calcination at 150°C for 2h, and then cooled. The calcined zeolite was placed in a 0.5 mol / L NaCl solution and shaken for 2h, with a solid-liquid ratio of 1:20. The solution was filtered and washed until neutral, and then dried in an oven at 60°C to obtain the modified zeolite.

[0109] Modified tourmaline: The tourmaline was washed with deionized water, dried, crushed, ground, and sieved, and the powder particles with a particle size of 300-350 mesh were selected and placed in a muffle furnace for calcination at 300°C for 2h, and then cooled to obtain the modified tourmaline.

[0110] Modified wollastonite: The wollastonite was washed with deionized water, dried, crushed, ground, and sieved, and the powder particles with a particle size of 80-100 mesh were selected to obtain the modified wollastonite.

[0111] Modified serpentine: The serpentine was washed with deionized water, dried, crushed, ground, and sieved, and the powder particles with a particle size of 300-350 mesh were selected and placed in a crucible, which was then placed in a muffle furnace for high-temperature modification at 350°C. The calcination was continued for 3h at this temperature, and then the modified serpentine was obtained after cooling.

[0112] The dissolution amounts of the unmodified celestite raw material, strontium-containing dolomite raw material, maifanite raw material, zeolite raw material, tourmaline raw material, wollastonite raw material, and serpentine raw material, and the modified modified celestite, modified strontium-containing dolomite, modified maifanite, modified zeolite, modified tourmaline, modified wollastonite, and modified serpentine were detected, and the results are shown in Table 2.

[0113] The dissolution amount detection method was as follows: 2g of each mineral raw material or modified mineral was weighed using an analytical balance and placed in a polyethylene bottle. 20mL of distilled water was added to each bottle, which was then left to stand at room temperature (25°C) for 24h. The supernatant was then obtained by centrifugation. The absorbance was measured using a UV spectrometer to determine the content of metasilicate ions, and the strontium content was measured using ICP-MS. The specific test steps are referred to GB8538-2022.

[0114] Table 2: Test results of the dissolution performance of metasilicate ions and strontium ions of each mineral raw material and each modified mineral

[0115] [CDATA[c(H2SiO3) / mg·L -1 ]] [c(Sr) / mg L -1 ]]> Lapis lazuli raw material -- 29.5 Modified lapis lazuli -- 52.7 Strontium-containing dolomite raw material -- 7.5 Modified strontium-containing dolomite -- 28.3 Pumice raw material 18.6 -- Modified pumice 33.1 -- Zeolite raw material 22.4 -- Modified zeolite 43.7 -- Tourmaline raw material 2.5 -- Modified tourmaline 4.1 -- Wollastonite raw material 1.2 -- Modified wollastonite 4.7 -- Serpentine raw material 4.0 -- Modified serpentine 12.4 --

[0116] As can be seen from the data in Table 2, the strontium ion dissolution amount or metasilicate ion dissolution amount of the celestite raw material, strontium-containing dolomite raw material, maifanite raw material, zeolite raw material, tourmaline raw material, wollastonite raw material, and serpentine raw material was greatly improved after modification. Therefore, the modified celestite, modified strontium-containing dolomite, modified maifanite, modified zeolite, modified tourmaline, modified wollastonite, and modified serpentine can increase the content of metasilicate or strontium in pure water.

[0117] The modified lapis lazuli, modified strontium-containing dolomite, modified medical stone, modified zeolite, modified tourmaline, modified wollastonite and modified serpentine were mixed in the order of density from small to large according to the formula of Table 3 to obtain mineralized compositions #1-5.

[0118] Table 3 Formula of mineralized compositions #1-5

[0119]

[0120] Test example 1 Silicate ion, strontium ion leaching capacity and acid-base adjustment capacity of mineralized compositions #1-5

[0121] (1) Static test

[0122] An analytical balance was used to quantitatively prepare 6g of mineralized composition #1, mineralized composition #2, mineralized composition #3, mineralized composition #4 and mineralized composition #5, respectively, and put them into polyethylene bottles. 60mL of distilled water was added to each, and after standing at room temperature 25℃ for 24h, the supernatant was obtained by centrifugation. The supernatant was tested for silicate content, strontium content and water pH according to GB8538-2022.

[0123] In the static test, the concentrations of metasilicic acid and strontium in the water treated by mineralized compositions #1-5 and the pH of the water are shown in Table 4:

[0124] Table 4 Test results of leaching capacity of mineralized compositions #1-5 in static test

[0125]

[0126]

[0127] It can be seen that after soaking in mineralized compositions #1-5 for 24h, the silicate content in the water is more than 120mg / L, the strontium content is more than 2mg / L, and the pH is more than 7, showing weak alkaline. However, when the proportion of modified medical stone and modified zeolite releasing silicate ions is increased (mineralized composition #4), the growth trend of silicate content in water slows down, and the strontium content decreases by one or more times, which may be due to the balance between ion diffusion and adsorption on the surface of the mineral, and the amount of dissolved ions is inhibited.

[0128] (2) Stirring experiment

[0129] The mineralized composition #1, the mineralized composition #2, the mineralized composition #3, the mineralized composition #4, and the mineralized composition #5 were respectively quantitatively configured by using an analytical balance to add 6 g of each into a polyethylene bottle, 60 mL of distilled water and a magnetic stirrer were added to each, and the mixture was stirred at room temperature of 25°C for 24 h by using a magnetic stirrer at a stirring speed of 300 r / min. The supernatant was obtained by sampling and centrifugation at different times, and the content of metasilicic acid, the content of strontium, and the pH value of the water were determined according to GB8538-2022.

[0130] In the stirring test, the concentrations of metasilicic acid and strontium in the water treated by the mineralized composition #1-5 for different times and the pH of the water are shown in Table 5-1, Table 5-2, Table 5-3, Table 5-4, and Table 5-5.

[0131] Table 5-1 Mineralization performance of the mineralized treatment #1 in the stirring test

[0132]

[0133] Table 5-2 Mineralization performance of the mineralized treatment #2 in the stirring test

[0134]

[0135]

[0136] Table 5-3 Mineralization performance of the mineralized treatment #3 in the stirring test

[0137]

[0138] Table 5-4 Mineralization performance of the mineralized treatment #4 in the stirring test

[0139]

[0140] Table 5-5 Mineralization performance of the mineralized treatment #5 in the stirring test

[0141]

[0142] As shown in the data in Table 5-1, Table 5-2, Table 5-3, Table 5-4, and Table 5-5, the concentrations of metasilicic acid and strontium in the water treated by the mineralized composition #1-5 increase with time, the pH of the water is stable between 7.0-8.5, and the water is weakly alkaline. Moreover, compared with the standing test, the content of metasilicic acid and the content of strontium in the water are improved in the stirring test. This is because under the stirring condition, the contact area between the mineralized composition and the water increases, the hydration is more obvious, the boundary layer around it is destroyed, the surface is always in contact with fresh low-concentration water, a high concentration gradient is maintained, and thus the continuous dissolution of metasilicic acid ions and strontium ions is accelerated.

[0143] (3) Dissolution persistence experiment

[0144] To explore the persistence of metasilicate ion and strontium ion leaching in the mineralized composition, a 21-day soaking experiment was designed: 6 g of mineralized composition #1, mineralized composition #2, mineralized composition #3, mineralized composition #4, and mineralized composition #5 were respectively quantitatively weighed in a polyethylene bottle, 60 mL of distilled water was added, and after soaking at room temperature 25°C for 24 h, the supernatant was centrifuged and detected. The supernatant was detected for metasilicate content, strontium content, and water pH value according to GB8538-2022. The solid-liquid separation of the centrifuged product was carried out, 20 mL of distilled water was added to the solid, and the above operation was repeated for 7 days.

[0145] The dissolution persistence test results of mineral composition #1-5 are shown in Table 6-1, Table 6-2, Table 6-3, Table 6-4, and Table 6-5:

[0146] Table 6-1 Mineralization performance of mineralized product #1 in dissolution persistence test

[0147]

[0148] Table 6-2 Mineralization performance of mineralized product #2 in dissolution persistence test

[0149]

[0150]

[0151] Table 6-3 Mineralization performance of mineralized product #3 in dissolution persistence test

[0152]

[0153] Table 6-4 Mineralization performance of mineralized product #4 in dissolution persistence test

[0154]

[0155] Table 6-5 Mineralization performance of mineralized product #5 in dissolution persistence test

[0156]

[0157]

[0158] From the data of Table 6-1, Table 6-2, Table 6-3, Table 6-4 and Table 6-5, it can be seen that with the increase of the number of days of using the mineralization composition, the concentration of metasilicic acid and the concentration of strontium in the water both have a downward trend, and the downward trend is relatively stable, the degree of decrease of the concentration of metasilicic acid is not more than 23 mg / L within 7 days, and the degree of decrease of the concentration of strontium is not more than 8 mg / L within 7 days. After 7 days of treatment, the concentration of metasilicic acid in the water is still at least 140 mg / L, the concentration of strontium is still at least 5 mg / L, and the pH of the water is also stable between 7.5-8.5. Therefore, the mineralization compositions #1-5 provided by the present application can meet the requirements of long-term use and can be made into filter cartridges.

[0159] The above mineralization compositions #1-5 are made into mineralization filter cartridges, and the specific flow chart can refer to the schematic flow chart in Figure 1 . The specific implementation is as follows:

[0160] Example 1

[0161] 60 g of mineralization composition #1 is stirred and mixed with 84 g of non-acid washing activated carbon and 96 g of Celanese gur4120 in sequence. The mixed material is filled into a mold, sintered at 180℃ for 30 min, and hot-pressed to shape. After cooling and solidification, a filter cartridge is obtained.

[0162] Example 2

[0163] The same as Example 1, except that mineralization composition #2 is used to replace mineralization composition #1.

[0164] Example 3

[0165] The same as Example 1, except that mineralization composition #3 is used to replace mineralization composition #1.

[0166] Example 4

[0167] The same as Example 1, except that mineralization composition #4 is used to replace mineralization composition #1.

[0168] Example 5

[0169] The same as Example 1, except that mineralization composition #5 is used to replace mineralization composition #1.

[0170] Test Example 2 Mineralization Effect of Mineralization Filter Cartridge on Water

[0171] (1) Water test

[0172] The mineralized filter cartridges of Examples 1-5 and the filter cartridge of Comparative Example 1 were installed in filter housings, and connected to a deionized water tank; after flushing with 10 L of water, a sample was taken (this sample was the 0 L sample) and the water flow rate was started to be calculated using a test tool; during the water flow process, the flow rate was controlled to be 0.3±0.05 L / min; the sampling test points were 0 L, 50 L and 100 L, and the concentrations of metasilicic acid and strontium in the water body and the pH of the water body were tested, and the test method was the same as that of Test Example 1.

[0173] The test results of the water flow test are shown in Tables 7-1, 7-2, 7-3, 7-4 and 7-5.

[0174] Table 7-1 Water flow test results of the mineralized filter cartridge obtained in Example 1

[0175]

[0176] Table 7-2 Water flow test results of the mineralized filter cartridge obtained in Example 2

[0177]

[0178] Table 7-3 Water flow test results of the mineralized filter cartridge obtained in Example 3

[0179]

[0180]

[0181] Table 7-4 Water flow test results of the mineralized filter cartridge obtained in Example 4

[0182]

[0183] Table 7-5 Water flow test results of the mineralized filter cartridge obtained in Example 5

[0184]

[0185] As can be seen from the data results in Tables 7-1, 7-2, 7-3, 7-4 and 7-5, in the 100 L water flow test, the mineralized filter cartridges provided in Examples 1-4 have a metasilicic acid ion elution capacity of not less than 0.9 mg / L and a strontium ion elution capacity of not less than 0.2 mg / L. It can be seen that the mineralized filter cartridges provided in Examples 1-5 can stably release sufficient metasilicic acid ions and strontium ions in a flowing water state, thereby increasing the contents of metasilicic acid and strontium in the water, and at the same time, making the treated water weakly alkaline.

[0186] Since the water passing test usually only reflects the short-term dissolution capacity of metasilicate ions and strontium ions in the mineralized filter element, and in actual application, the mineralized filter element may be in a soaking state for a certain period of time. In order to verify that the mineralized filter element made of the mineralized composition provided by the present application still has good dissolution capacity of metasilicate ions and strontium ions in the soaking state without water flow, the present application further carries out the following supplementary standing test after the 100L water passing performance test of the mineralized filter element.

[0187] (2) Standing test:

[0188] After the 100L water passing test of the mineralized filter element obtained in Example 1-4, the mineralized filter element was again placed in pure water for 24h, 48h and 72h, respectively, and the concentration of metasilicate and strontium in the water, pH and TDS were sampled and tested, and the test method referred to GB8538-2022.

[0189] The test data of the standing test are shown in Table 8-1, Table 8-2, Table 8-3 and Table 8-4.

[0190] Table 8-1 Test results of the standing test of the mineralized filter element obtained in Example 1

[0191]

[0192] Table 8-2 Test results of the standing test of the mineralized filter element obtained in Example 2

[0193]

[0194] Table 8-3 Test results of the standing test of the mineralized filter element obtained in Example 3

[0195]

[0196] Table 8-4 Test results of the standing test of the mineralized filter element obtained in Example 4

[0197]

[0198] From the data in Table 8-1, Table 8-2, Table 8-3 and Table 8-4, it can be known that after the mineralized filter element provided by the present application is treated with 100L water passing, the content of metasilicate and strontium in the water can still be stably increased after standing for 3 days, and the TDS of the water meets the food safety requirements for drinking natural mineral water in GB838-2022.

[0199] (3) Soaking test

[0200] In order to investigate the safety of the mineralized filter element obtained in Example 1-5 during long-term use, the present application carries out a soaking test on it.

[0201] Preparation of stock solution:

[0202] a. 0.025 mol / L chlorine stock solution: Take 7.3 mL of reagent grade sodium hypochlorite (5% NaOCl), dilute to 200 mL with pure water, store in a tightly stoppered brown bottle, and keep at 20°C in the dark. Freshly prepare every week.

[0203] b. 0.04 mol / L calcium hardness stock solution: Weigh 4.44 g of anhydrous calcium chloride (CaCl2), dissolve in pure water, and dilute to 1.0 L. Mix well and freshly prepare every week.

[0204] c. 0.04 mol / L sodium bicarbonate buffer solution: Dissolve 3.36 g of anhydrous sodium bicarbonate (NaHCO3) in pure water and dilute to 1 L with pure water. Mix well and freshly prepare every week.

[0205] Preparation of soaking water:

[0206] The method for preparing soaking water with a pH of 8, a hardness of 100 mg / L, and an available chlorine of 2 mg / L is as follows: Take 25 mL of sodium bicarbonate buffer solution, 25 mL of calcium hardness stock solution, and the required chlorine stock solution, and dilute to 1 L with pure water.

[0207] Soaking test: After the pretreated mineralized filter cartridge is rinsed in the soaking solution for 30 s, the soaking solution in the mineralized filter cartridge is drained, and the mineralized filter cartridge is placed in a suitable container without gaps and tightly sealed at both ends with clean softwood plugs or rubber plugs wrapped in polytetrafluoroethylene film. Add about 682 ml of soaking solution according to the ratio of the surface area of the mineralized filter cartridge to the surface area of the soaking solution, which is 1:2. Then place the mineralized filter cartridge in an environment with a temperature of 25°C ± 5°C and avoid light for 24 h ± 1 h. Take another glass container of the same volume, fill it with the test soaking water, and place it in the same conditions for 24 h ± 1 h as a blank control. After soaking, all the water in the container is removed for testing of health and safety.

[0208] Test the color, turbidity, odor and taste, visible matter, pH, dissolved solids, arsenic, cadmium, chromium, lead, aluminum, iron, manganese, copper, zinc, and silver in the water according to GB 8538-2022. The results are shown in Tables 9-1 and 9-2.

[0209] Table 9-1 Test results of drinking safety indicators of mineralized filter cartridges obtained in Examples 1-3

[0210]

[0211]

[0212] Table 9-2 Test results of drinking safety indicators of mineralized filter cartridges obtained in Examples 4-5

[0213]

[0214]

[0215] From the data of Table 9-1 and Table 9-2, it can be seen that the mineralization filter core provided by the present application has good use safety and meets the national drinking water safety requirements.

[0216] In summary, the mineralization composition provided by the present application has excellent silicate ion and strontium ion dissolution capacity, the mineralization filter core prepared by using the mineralization composition can not only increase the content of metasilicic acid and strontium in pure water, but also adjust the water quality to be weakly alkaline. More importantly, for silicate ions and strontium ions, the mineralization filter core also has a safe and long-acting release period, which can meet the application requirements of people for the mineralization filter core.

[0217] Finally, it should be noted that: other embodiments of the present application will be easily conceived by those skilled in the art after considering the specification and practicing the present application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application following the general principles of the present application and including known or customary technical means in the art which are not disclosed by the present application, and is not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present application is only limited by the appended claims.

Claims

1. A mineralized composition, characterized in that include: Modified celestite, modified strontium-containing dolomite, modified medical stone, modified zeolite, modified tourmaline, modified wollastonite and modified serpentine; The strontium ion dissolution amount of the modified celestite is 50-55 mg / L; The strontium ion dissolution amount of the modified strontium-containing dolomite is 15-20 mg / L; The metasilicate ion dissolution amount of the modified medical stone is 30-35 mg / L; The metasilicate ion dissolution amount of the modified zeolite is 40-45 mg / L; The metasilicate ion dissolution amount of the modified tourmaline is 3-5 mg / L; The metasilicate ion dissolution amount of the modified wollastonite is 3-5 mg / L; The metasilicate ion dissolution amount of the modified serpentine is 10-15 mg / L.

2. The mineralized composition according to claim 1, characterized in that The particle size of the modified celestite is 300-350 mesh; The particle size of the modified strontium-containing dolomite is 300-350 mesh; The particle size of the modified medical stone is 300-350 mesh; The particle size of the modified zeolite is 300-350 mesh; The particle size of the modified tourmaline is 300-350 mesh; The particle size of the modified wollastonite is 80-100 mesh; The particle size of the modified serpentine is 300-350 meshes.

3. The mineralized composition according to claim 1 or 2, characterized in that The modified celestite is prepared by a method comprising the following steps: acid-treating a celestite raw material to obtain the modified celestite; And / or, the modified strontium-containing dolomite is prepared by a method comprising the following steps: calcining a strontium-containing dolomite raw material to obtain the modified strontium-containing dolomite; And / or, the modified medical stone is prepared by a method comprising the following steps: calcining and acid-treating medical stone raw materials to obtain the modified medical stone; And / or, the modified zeolite is prepared by a method comprising the following steps: calcining and salting a zeolite raw material to obtain the modified zeolite; And / or, the modified tourmaline is prepared by a method comprising the following steps: calcining a tourmaline raw material to obtain the modified tourmaline; And / or, the modified wollastonite is prepared by a method comprising the following process: mechanically treating a wollastonite raw material to obtain the modified wollastonite; And / or, the modified serpentine is prepared by a method comprising the following process: calcining a serpentine raw material to obtain the modified serpentine.

4. The mineralized composition according to any one of claims 1 to 3, characterized in that The acid treatment comprises: mixing the mineral to be acid-treated with an acidic aqueous solution, and then soaking the mixture at 20-35° C. for 0.5-4 hours; the mass molar ratio of the mineral to be acid-treated to the hydrogen ions contained in the acidic aqueous solution is 1 g: 0.015-0.03 mol; And / or, the calcination treatment comprises: calcining the mineral to be calcined at 150-700° C. for 1-3 hours; And / or, the salt treatment comprises: mixing the mineral to be salted with a brine solution and shaking for 2-24 hours; the mass molar ratio of the mineral to be salted to the alkali metal cation in the brine solution is 1g:0.01-0.015mol; And / or, the mechanical treatment includes: crushing, grinding, and screening.

5. The mineralized composition according to any one of claims 3 to 4, characterized in that The acidic aqueous solution includes an aqueous citric acid solution; Preferably, the concentration of the citric acid aqueous solution is 0.25-0.5 mol / L; and / or, the saline solution comprises an aqueous sodium chloride solution; Preferably, the concentration of the sodium chloride aqueous solution is 0.1-1.5 mol / L.

6. The mineralized composition according to any one of claims 1 to 5, characterized in that The invention comprises, by weight, 1.5-10 parts of modified celestite, 0.5-4.0 parts of modified strontium-containing dolomite, 15-20 parts of modified medical stone, 15-22 parts of modified zeolite, 7-15 parts of modified tourmaline, 1-4 parts of modified wollastonite and 2-4 parts of modified serpentine.

7. The mineralized composition according to any one of claims 1 to 6, characterized in that Calculated by weight, it includes: 6-10 parts of modified celestite, 2-4 parts of modified strontium-containing dolomite, 15-18 parts of modified medical stone, 15-20 parts of modified zeolite, 7-10 parts of modified tourmaline, 2-4 parts of modified wollastonite and 2-4 parts of modified serpentine; Or, 1.5-4 parts of modified celestite, 0.5-1 part of modified strontium-containing dolomite, 15-20 parts of modified medical stone, 20-22 parts of modified zeolite, 10-15 parts of modified tourmaline, 1-4 parts of modified wollastonite and 2-4 parts of modified serpentine.

8. A mineralized filter element, characterized in that: The mineralized composition comprises any one of claims 1 to 7.

9. The mineralized filter element according to claim 8, characterized in that: According to the percentage by mass, the mineralized filter element comprises: 20-30% of the mineralized composition, 40-45% of the binder and 30-35% of the activated carbon.

10. A water purifier, characterized in that: The invention comprises the mineralized composition according to any one of claims 1 to 7 or the mineralized filter element according to any one of claims 8 to 9.

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