A safe adjustable mineralized carbon rod and a preparation method thereof

Abstract

The present application relates to a kind of safe adjustable mineralization carbon rod and its preparation method, the preparation method is by activated natural ore powder, activated porous ore powder and first binder are mixed granulation to obtain composite mineralization particle, can be adsorbed to activated natural ore powder, so that mineral matter can be smoothly dissolved, realize the slow release of mineral matter once, further control the dissolution amount of mineral matter by surface treatment of composite mineralization particle, realize the slow release of mineral matter twice, finally with modified activated carbon and second binder are mixed into shape to obtain safe adjustable mineralization carbon rod, play the role of three times slow release mineral matter, in the process of continuous water, can effectively slowly release strontium, calcium and magnesium and other elements so that drinking water composite mineralization, and release amount keeps dynamic balance in a certain range, improve the content of trace element in drinking water, also can effectively remove perfluorooctanoic acid in drinking water, high safety, long service life.

Description

Technical Field

[0001] This invention relates to the field of mineralized filter technology, specifically to a safe and adjustable mineralized carbon rod and its preparation method. Background Technology

[0002] Water is an indispensable substance in people's lives. Mineral water contains a certain amount of minerals and trace elements, such as calcium, magnesium, and potassium. These minerals and trace elements are essential components needed by the human body and play an important role in maintaining life activities, keeping electrolyte balance, and promoting bone growth. Therefore, drinking water health is particularly important.

[0003] Water purifiers provide residents with safe drinking water. They mainly use PP cotton filters, activated carbon filters, RO membrane filters, and post-carbon filters to purify and improve the taste. As consumers' demand for healthy water increases, mineral materials are usually filled into the post-carbon filter. This means using natural mineral particles to fill the post-carbon filter to form a mineralized filter. Natural rocks can release chemical elements and minerals to mineralize the water, increase the mineralization of the raw water, and restore pure water to healthy water rich in minerals.

[0004] However, existing mineralized carbon rods, due to the poor porosity of their internal particles, cannot effectively adsorb and fix natural rocks, resulting in unstable mineral release. They typically have a strong effect and high dissolution rate in the initial stage of use, but the effect becomes weak or even nonexistent in the later stages, with mediocre mineralization and a short lifespan, thus failing to provide truly healthy mineral water. Summary of the Invention

[0005] Therefore, it is necessary to provide a safe and adjustable mineralized carbon rod and its preparation method.

[0006] The technical solution of this invention to solve the above-mentioned technical problems is as follows: A method for preparing a safe and adjustable mineralized carbon rod, comprising the following steps:

[0007] Activated natural ore powder and activated porous ore powder are mixed to obtain composite mineralized powder;

[0008] The composite mineralized powder and the first binder are mixed and granulated to obtain composite mineralized particles;

[0009] The composite mineralized particles are subjected to surface treatment to obtain modified composite mineralized particles;

[0010] The modified composite mineralized particles, modified activated carbon, and second binder are mixed and molded to obtain a safe and adjustable mineralized carbon rod.

[0011] In one embodiment, when the activated natural ore powder and the activated porous ore powder are mixed, the activated natural ore powder and the activated porous ore powder are mixed at a mass ratio of 1-20:1.

[0012] In one embodiment, the activated natural ore powder is one or more of activated strontium-rich sedimentary rocks, activated limestone, activated dolomite, activated Iceland spar, and activated magnesite.

[0013] In one embodiment, the activated porous ore powder is activated zeolite or activated volcanic rock.

[0014] In one embodiment, when the composite mineralized powder and the first binder are mixed, the composite mineralized powder and the first binder are mixed at a mass ratio of 6-12:1.

[0015] In one embodiment, the surface treatment of the composite mineralized particles includes:

[0016] The composite mineralized particles are surface-treated using a surfactant.

[0017] In one embodiment, the surfactant is 0.5%-2% of silane coupling agent KH550 or 0.5%-2% of silane coupling agent KH570.

[0018] In one embodiment, mixing the modified composite mineralized particles, modified activated carbon, and the second binder includes:

[0019] By weight, 5-30 parts of modified composite mineralized particles, 40-60 parts of modified activated carbon, and 25-40 parts of a second binder are mixed.

[0020] In one embodiment, the method for treating the modified activated carbon includes:

[0021] Pretreatment of activated carbon;

[0022] The pretreated activated carbon is then reactivated.

[0023] Surface chemical modification was performed on the activated carbon after secondary activation to obtain modified activated carbon.

[0024] The present invention also provides a safe and adjustable mineralized carbon rod, which is prepared by the method for preparing a safe and adjustable mineralized carbon rod as described in any of the above embodiments.

[0025] The beneficial effects of this invention are as follows: This invention provides a method for preparing a safe and adjustable mineralized carbon rod. The method involves mixing activated natural ore powder, activated porous ore powder, and a first binder to obtain composite mineralized particles. The activated porous ore powder can adsorb the activated natural ore powder, allowing the minerals to dissolve smoothly and achieving a primary slow release of the minerals. Then, surface treatment of the composite mineralized particles further controls the amount of mineral dissolution, achieving a secondary slow release of the minerals. Finally, the composite mineralized particles are mixed with modified activated carbon and a second binder to form a safe and adjustable mineralized carbon rod. The modified activated carbon has better pore structure and surface chemical properties, high chemical and thermal stability, and can withstand different environmental conditions. Maintaining good adsorption performance, it can not only effectively adsorb modified composite mineralization particles and control their single release amount, thus achieving the effect of slow release of minerals in three stages, but also reduce the resistance when the fluid passes through. At the same time, it can also have a good removal effect on emerging pollutants such as PFOA and PFAS. The prepared safe and adjustable mineralization carbon rod can effectively and slowly release elements such as strontium, calcium and magnesium during continuous water flow, thus achieving composite mineralization of drinking water. Moreover, the release amount maintains a dynamic balance within a certain range. This not only increases the content of trace elements in drinking water, but also meets the national limit standards for trace elements in natural drinking mineral water. It can effectively remove perfluorooctanoic acid from drinking water, with high safety and long service life. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic flowchart illustrating a method for preparing a safe and adjustable mineralized carbon rod according to an embodiment of the present invention.

[0028] Figure 2 A graph showing the increase in TDS value after soaking composite mineralized powder;

[0029] Figure 3 A graph showing the strontium dissolution rate when the composite mineralized powder is soaked.

[0030] Figure 4 A graph showing the increase in TDS value after soaking composite mineralized powder;

[0031] Figure 5 A graph showing the strontium dissolution rate when the composite mineralized powder is soaked.

[0032] Figure 6A graph showing the calcium dissolution rate when the composite mineralized powder is soaked.

[0033] Figure 7 A graph showing the amount of magnesium leached from composite mineralized powder after immersion.

[0034] Figure 8 A graph showing the increase in TDS value after soaking composite mineralized particles;

[0035] Figure 9 A graph showing the strontium dissolution rate when immersing composite mineralized particles;

[0036] Figure 10 A graph showing the leaching rate of calcium and magnesium when immersing composite mineralized particles;

[0037] Figure 11 A graph showing the increase in TDS value after soaking modified composite mineralized particles;

[0038] Figure 12 A graph showing the strontium leaching rate when the modified composite mineralized particles are soaked.

[0039] Figure 13 A graph showing the leaching rate of calcium and magnesium from the modified composite mineralized particles after soaking.

[0040] Figure 14 A graph showing the strontium content in the water used to rinse the formed carbon rods;

[0041] Figure 15 A graph showing the calcium and magnesium content of the shaped carbon rods after rinsing with water. Detailed Implementation

[0042] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0044] In one embodiment, such as Figure 1 As shown, a method for preparing a safe and adjustable mineralized carbon rod includes the following steps:

[0045] Step 110: Mix the activated natural mineral powder and the activated porous mineral powder to obtain composite mineralized powder.

[0046] In this embodiment, when the activated natural ore powder and the activated porous ore powder are mixed, they are mixed at a mass ratio of 1-20:1. The activated porous ore powder can effectively adsorb the activated natural ore powder, allowing the minerals in the activated natural ore powder to dissolve smoothly. The activated natural ore powder is one or more of the following: activated strontium-rich sedimentary rock, activated limestone, activated dolomite, activated Iceland spar, and activated magnesite. The activated porous ore powder is activated zeolite or activated volcanic rock. The type and content of the activated natural ore powder can be selected according to the requirements of drinking water composite mineralization.

[0047] In one embodiment, the activation method of natural mineral powder is as follows: first, the natural ore is crushed, then repeatedly rinsed with pure water, dried, and then screened into powder of 35-100 mesh. The powder is then soaked in an activation treatment solution for 4-8 hours. The activation treatment solution is a mixed solution of potassium hydroxide and potassium sulfate. After the powder is removed, it is placed in an oven for high-temperature activation treatment at 250-350℃ to obtain activated natural mineral powder.

[0048] In one embodiment, the activation method for activated porous ore powder is as follows: first, the porous ore is crushed, then repeatedly rinsed with pure water, dried, and then screened into powder of 35-100 mesh. The powder is then soaked in an activation treatment solution for 4-12 hours. The activation treatment solution is a mixed solution of dilute hydrochloric acid and potassium chloride. After removing the powder, it is placed in an oven for high-temperature activation treatment at 250-350°C to obtain activated porous ore powder.

[0049] Step 120: Mix the composite mineralized powder and the first binder, and granulate to obtain composite mineralized particles.

[0050] In this embodiment, the first binder is one of polyvinyl alcohol, polyvinyl butyral, and silica sol. The composite mineralized powder and the first binder are mixed at a mass ratio of 6-12:1, which can mix and granulate activated natural mineral powder and activated porous mineral powder to obtain composite mineralized particles.

[0051] In one embodiment, activated strontium-rich sedimentary rocks and activated zeolites are mixed at a mass ratio of 1-5:1 to obtain low-mineralized composite mineralized particles.

[0052] In one embodiment, activated strontium-rich sedimentary rock, activated limestone, activated magnesite, and activated zeolite are mixed in a mass ratio of 3-6:4-12:1-2:1 to obtain highly mineralized composite mineralized particles.

[0053] Step 130: Perform surface treatment on the composite mineralized particles to obtain modified composite mineralized particles.

[0054] In this embodiment, a surfactant is used to treat the surface of the composite mineralized particles. The surfactant is a silane coupling agent and a hydrophobic agent, which can reduce the wettability of the surface of the composite mineralized particles and further control the amount of minerals dissolved from the composite mineralized particles.

[0055] In one embodiment, the surfactant is 0.5%-2% of silane coupling agent KH550 or 0.5%-2% of silane coupling agent KH570. Specifically, silane coupling agent KH550, through its amino and ethoxy groups, and silane coupling agent KH570, which contains a methacryloyloxy functional group and three hydrolyzable methoxy functional groups, can both improve the binding force between the composite mineralized particles and the organic polymer material. This improves the water resistance of the composite mineralized particles, further controls the dissolution of minerals, and helps improve the dispersibility of the composite mineralized particles in the organic polymer material, enabling a more uniform release of minerals from the composite mineralized particles.

[0056] Step 140: Mix the modified composite mineralized particles, modified activated carbon, and second binder to form a safe and adjustable mineralized carbon rod.

[0057] In this embodiment, the second binder is high molecular weight polyethylene powder. When the modified composite mineralized particles, modified activated carbon, and the second binder are mixed, by weight, 5-30 parts of the modified composite mineralized particles, 40-60 parts of the modified activated carbon, and 25-40 parts of the second binder are mixed. The modified activated carbon can effectively adsorb the modified composite mineralized particles and control their single release amount. The resulting safe and adjustable mineralized carbon rod can slowly release and activate the minerals in the natural mineral powder in multiple stages, with high safety and long service life.

[0058] In one embodiment, the method for treating the modified activated carbon includes: pretreating the activated carbon, reactivating the pretreated activated carbon, and performing surface chemical modification on the reactivated activated carbon to obtain modified activated carbon. Specifically, the pretreatment of the activated carbon includes sieving the activated carbon according to particle size, for example, sieving to obtain activated carbon of 40-60 mesh, and then washing the sieved activated carbon to remove impurities and dust from the surface of the activated carbon, thereby improving the purity of the activated carbon. During the reactivation of the pretreated activated carbon, the pretreated activated carbon is exposed to a high-temperature gas environment at 250-300°C, which can further change the pore structure and surface properties of the activated carbon, improving its adsorption performance. During the surface chemical modification of the reactivated activated carbon, strong oxidants such as hydrogen peroxide, nitric acid, or chloric acid are used to oxidize and modify the activated carbon, changing the functional groups and chemical properties of the activated carbon surface, increasing the number of oxygen-containing functional groups on the activated carbon surface, thereby improving its adsorption capacity.

[0059] In this embodiment, by modifying activated carbon, better pore structure and surface chemical properties are achieved, resulting in high chemical and thermal stability. This allows it to maintain good adsorption performance under various environmental conditions, effectively adsorbing modified composite mineral particles and controlling their single release, thus achieving a slow, three-stage release of minerals and reducing fluid resistance. Simultaneously, it can remove emerging pollutants such as PFAS (per- and polyfluoroalkyl substances), represented by PFOA (perfluorooctanoic acid), with a removal rate exceeding 99%. It is worth noting that PFAS are emerging pollutants, often referred to as "permanent chemicals" and "toxic time bombs," and are included in the "List of Key Controlled New Pollutants (2023 Edition)." Removing emerging pollutants like PFOA is a crucial aspect of current water purification development.

[0060] This invention also provides a safe and adjustable mineralizing carbon rod, prepared by the method described in any of the above embodiments. During continuous water flow, it can effectively and slowly release elements such as strontium, calcium, and magnesium to achieve complex mineralization of drinking water, and the release amount maintains a dynamic balance within a certain range. This not only increases the content of trace elements in drinking water but also meets the national limit standards for trace elements in natural drinking mineral water. It can activate minerals in natural mineral powder through multi-stage slow release and effectively remove new pollutants such as PFAS, represented by PFOA, from drinking water. It has high safety and a long service life.

[0061] Compared with the prior art, the present invention has at least the following advantages:

[0062] This invention provides a method for preparing a safe and adjustable mineralized carbon rod. The method involves mixing and granulating activated natural ore powder, activated porous ore powder, and a first binder to obtain composite mineralized particles. The activated porous ore powder adsorbs the activated natural ore powder, allowing for stable mineral dissolution and achieving a primary slow release of minerals. Surface treatment of the composite mineralized particles further controls the amount of mineral dissolution, achieving a secondary slow release of minerals. Finally, the composite mineralized particles are mixed with modified activated carbon and a second binder to form a safe and adjustable mineralized carbon rod. The modified activated carbon has better pore structure and surface chemical properties, high chemical and thermal stability, and can maintain good performance under different environmental conditions. The adsorption performance not only effectively adsorbs modified composite mineralized particles and controls their single release amount, thus achieving a three-stage slow release of minerals, but also reduces fluid resistance. Furthermore, it exhibits excellent removal efficiency for emerging pollutants such as PFOA and PFAS. The resulting safe and adjustable mineralized carbon rods can effectively and slowly release elements such as strontium, calcium, and magnesium during continuous water flow, resulting in composite mineralization of drinking water. The release amount maintains a dynamic balance within a certain range, not only increasing the content of trace elements in drinking water but also meeting the national limits for trace elements in natural drinking mineral water. It can effectively remove perfluorooctanoic acid from drinking water, offering high safety and a long service life.

[0063] The present invention will be further described below with reference to specific embodiments.

[0064] Example 1

[0065] A composite mineralized powder is obtained by mixing activated natural ore powder and activated porous ore powder in a 1:1 mass ratio. The activated natural ore powder is activated strontium-rich sedimentary rock, and the activated porous ore powder is activated zeolite.

[0066] Example 2

[0067] A composite mineralized powder is obtained by mixing activated natural ore powder and activated porous ore powder in a mass ratio of 3:1. The activated natural ore powder is activated strontium-rich sedimentary rock, and the activated porous ore powder is activated zeolite.

[0068] Example 3

[0069] A composite mineralized powder is obtained by mixing activated natural ore powder and activated porous ore powder in a mass ratio of 5:1. The activated natural ore powder is activated strontium-rich sedimentary rock, and the activated porous ore powder is activated zeolite.

[0070] Example 4

[0071] A composite mineralized powder is made by mixing activated natural ore powder and activated porous ore powder in a mass ratio of 10:1. The activated natural ore powder is activated strontium-rich sedimentary rock, activated limestone and activated magnesite, and the activated porous ore powder is activated zeolite.

[0072] The mass ratio of activated strontium-rich sedimentary rock, activated limestone, activated magnesite, and activated zeolite is 3:4:2:1.

[0073] Example 5

[0074] A composite mineralized powder is obtained by mixing activated natural ore powder and activated porous ore powder in a mass ratio of 10:1. The activated natural ore powder is activated strontium-rich sedimentary rock, activated limestone and activated magnesite, and the activated porous ore powder is activated zeolite.

[0075] The mass ratio of activated strontium-rich sedimentary rock, activated limestone, activated magnesite, and activated zeolite is 3:5:1:1.

[0076] Example 6

[0077] A composite mineralized powder is obtained by mixing activated natural ore powder and activated porous ore powder in a mass ratio of 20:1. The activated natural ore powder is activated strontium-rich sedimentary rock, activated limestone and activated magnesite, and the activated porous ore powder is activated zeolite.

[0078] The mass ratio of activated strontium-rich sedimentary rock, activated limestone, activated magnesite, and activated zeolite is 6:12:1:1.

[0079] Example 7

[0080] A composite mineralized particle is obtained by mixing activated natural ore powder and activated porous ore powder in a mass ratio of 3:1 to obtain composite mineralized powder, and then mixing the composite mineralized powder and a first binder in a mass ratio of 8:1 to form granules.

[0081] Among them, the activated natural ore powder is activated strontium-rich sedimentary rock, the activated porous ore powder is activated zeolite, and the first binder is polyvinyl butyral.

[0082] Example 8

[0083] A composite mineralized particle is obtained by mixing activated natural ore powder and activated porous ore powder in a mass ratio of 3:1 to obtain composite mineralized powder, and then mixing the composite mineralized powder and a first binder in a mass ratio of 9:1 to form granules.

[0084] Among them, the activated natural ore powder is activated strontium-rich sedimentary rock, the activated porous ore powder is activated zeolite, and the first binder is polyvinyl butyral.

[0085] Example 9

[0086] A composite mineralized particle is obtained by mixing activated natural ore powder and activated porous ore powder at a mass ratio of 10:1, and then mixing the composite mineralized powder and a first binder at a mass ratio of 8:1 and granulating the mixture.

[0087] The activated natural ore powder consists of activated strontium-rich sedimentary rock, activated limestone, and activated magnesite; the activated porous ore powder consists of activated zeolite; the mass ratio of activated strontium-rich sedimentary rock, activated limestone, activated magnesite, and activated zeolite is 3:5:1:1; and the first binder is polyvinyl butyral.

[0088] Example 10

[0089] A composite mineralized particle is obtained by mixing activated natural ore powder and activated porous ore powder at a mass ratio of 10:1, and then granulating the composite mineralized powder and a first binder at a mass ratio of 9:1.

[0090] The activated natural ore powder consists of activated strontium-rich sedimentary rock, activated limestone, and activated magnesite; the activated porous ore powder consists of activated zeolite; the mass ratio of activated strontium-rich sedimentary rock, activated limestone, activated magnesite, and activated zeolite is 3:5:1:1; and the first binder is polyvinyl butyral.

[0091] Example 11

[0092] A modified composite mineralized particle is obtained by mixing activated natural ore powder and activated porous ore powder at a mass ratio of 3:1 to obtain composite mineralized powder, then mixing the composite mineralized powder and a first binder at a mass ratio of 9:1 to granulate the composite mineralized particles, and finally performing surface treatment with a surfactant.

[0093] Among them, the activated natural ore powder is activated strontium-rich sedimentary rock, the activated porous ore powder is activated zeolite, the first binder is polyvinyl butyral, and the surfactant is 0.5% silane coupling agent KH570.

[0094] Example 12

[0095] A modified composite mineralized particle is obtained by mixing activated natural ore powder and activated porous ore powder at a mass ratio of 3:1 to obtain composite mineralized powder, then mixing the composite mineralized powder and a first binder at a mass ratio of 9:1 to granulate the composite mineralized particles, and finally performing surface treatment with a surfactant.

[0096] Among them, the activated natural ore powder is activated strontium-rich sedimentary rock, the activated porous ore powder is activated zeolite, the first binder is polyvinyl butyral, and the surfactant is 1% silane coupling agent KH570.

[0097] Example 13

[0098] A modified composite mineralized particle is obtained by mixing activated natural ore powder and activated porous ore powder at a mass ratio of 3:1 to obtain composite mineralized powder, then mixing the composite mineralized powder and a first binder at a mass ratio of 9:1 to granulate the composite mineralized particles, and finally performing surface treatment with a surfactant.

[0099] Among them, the activated natural ore powder is activated strontium-rich sedimentary rock, the activated porous ore powder is activated zeolite, the first binder is polyvinyl butyral, and the surfactant is 2% silane coupling agent KH570.

[0100] Example 14

[0101] A modified composite mineralized particle is obtained by mixing activated natural ore powder and activated porous ore powder at a mass ratio of 10:1 to obtain composite mineralized powder, then mixing the composite mineralized powder and a first binder at a mass ratio of 9:1 to granulate the composite mineralized particles, and finally performing surface treatment with a surfactant.

[0102] The activated natural ore powder consists of activated strontium-rich sedimentary rock, activated limestone, and activated magnesite; the activated porous ore powder consists of activated zeolite; the mass ratio of activated strontium-rich sedimentary rock, activated limestone, activated magnesite, and activated zeolite is 3:5:1:1; the first binder is polyvinyl butyral; and the surfactant is 0.5% silane coupling agent KH550.

[0103] Example 15

[0104] A modified composite mineralized particle is obtained by mixing activated natural ore powder and activated porous ore powder at a mass ratio of 10:1 to obtain composite mineralized powder, then mixing the composite mineralized powder and a first binder at a mass ratio of 9:1 to granulate the composite mineralized particles, and finally performing surface treatment with a surfactant.

[0105] The activated natural ore powder consists of activated strontium-rich sedimentary rock, activated limestone, and activated magnesite; the activated porous ore powder consists of activated zeolite; the mass ratio of activated strontium-rich sedimentary rock, activated limestone, activated magnesite, and activated zeolite is 3:5:1:1; the first binder is polyvinyl butyral; and the surfactant is 1% silane coupling agent KH550.

[0106] Example 16

[0107] A modified composite mineralized particle is obtained by mixing activated natural ore powder and activated porous ore powder at a mass ratio of 10:1 to obtain composite mineralized powder, then mixing the composite mineralized powder and a first binder at a mass ratio of 9:1 to granulate the composite mineralized particles, and finally performing surface treatment with a surfactant.

[0108] The activated natural ore powder consists of activated strontium-rich sedimentary rock, activated limestone, and activated magnesite; the activated porous ore powder consists of activated zeolite; the mass ratio of activated strontium-rich sedimentary rock, activated limestone, activated magnesite, and activated zeolite is 3:5:1:1; the first binder is polyvinyl butyral; and the surfactant is 2% silane coupling agent KH550.

[0109] Example 17

[0110] A safe and adjustable mineralized carbon rod is prepared by mixing activated natural ore powder and activated porous ore powder at a mass ratio of 3:1 to obtain composite mineralized powder. Then, the composite mineralized powder and a first binder are mixed and granulated at a mass ratio of 9:1 to obtain composite mineralized particles. The composite mineralized particles are then surface-treated with a surfactant to obtain modified composite mineralized particles. Finally, the modified composite mineralized particles, modified activated carbon, and a second binder are mixed and molded to obtain a safe and adjustable mineralized carbon rod with a size of 30×12×180mm.

[0111] The activated natural ore powder is activated strontium-rich sedimentary rock, the activated porous ore powder is activated zeolite, the first binder is polyvinyl butyral, the surfactant is 1% silane coupling agent KH570, the second binder is high molecular weight polyethylene powder, the modified composite mineralized particles are 15 parts by mass, the modified activated carbon is 50 parts by mass, and the second binder is 30 parts by mass.

[0112] Example 18

[0113] A safe and adjustable mineralized carbon rod is prepared by mixing activated natural ore powder and activated porous ore powder at a mass ratio of 10:1 to obtain a composite mineralized powder. Then, the composite mineralized powder and a first binder are mixed and granulated at a mass ratio of 9:1 to obtain composite mineralized particles. The composite mineralized particles are then surface-treated with a surfactant to obtain modified composite mineralized particles. Finally, the modified composite mineralized particles, modified activated carbon, and a second binder are mixed and molded to obtain a safe and adjustable mineralized carbon rod with dimensions of 30×12×180mm.

[0114] The activated natural ore powder consists of activated strontium-rich sedimentary rock, activated limestone, and activated magnesite; the activated porous ore powder consists of activated zeolite; the mass ratio of activated strontium-rich sedimentary rock, activated limestone, activated magnesite, and activated zeolite is 3:5:1:1; the first binder is polyvinyl butyral; the surfactant is 1% silane coupling agent KH550; the second binder is high molecular weight polyethylene powder; the mass fraction of modified composite mineralized particles is 15 parts; the mass fraction of modified activated carbon is 50 parts; and the mass fraction of the second binder is 30 parts.

[0115] Comparative Example 1

[0116] A composite mineralized powder is the activated natural ore powder in the corresponding mass fraction of Example 1, wherein the activated natural ore powder is activated strontium-rich sedimentary rock.

[0117] Comparative Example 2

[0118] A composite mineralized powder, wherein the activated natural ore powder consists of activated strontium-rich sedimentary rock, activated limestone, and activated magnesite, and the mass ratio of activated strontium-rich sedimentary rock, activated limestone, activated magnesite, and activated zeolite is 3:5:2.

[0119] Comparative Example 3

[0120] A mineralized carbon rod is prepared by mixing activated natural ore powder and activated porous ore powder at a mass ratio of 3:1 to obtain a composite mineralized powder. Then, the composite mineralized powder and a first binder are mixed and granulated at a mass ratio of 9:1 to obtain composite mineralized particles. Finally, the composite mineralized particles, modified activated carbon, and a second binder are mixed and molded to obtain a safe and adjustable mineralized carbon rod with a size of 30×12×180mm.

[0121] The activated natural ore powder is activated strontium-rich sedimentary rock, the activated porous ore powder is activated zeolite, the first binder is polyvinyl butyral, the second binder is high molecular weight polyethylene powder, the composite mineralized particles have a mass fraction of 15 parts, the modified activated carbon has a mass fraction of 50 parts, and the second binder has a mass fraction of 30 parts.

[0122] Comparative Example 4

[0123] A mineralized carbon rod is prepared by mixing activated natural ore powder and activated porous ore powder at a mass ratio of 3:1 to obtain a composite mineralized powder. Then, the composite mineralized powder and a first binder are mixed and granulated at a mass ratio of 9:1 to obtain composite mineralized particles. Finally, the composite mineralized particles, modified activated carbon, and a second binder are mixed and molded to obtain a safe and adjustable mineralized carbon rod with a size of 30×12×180mm.

[0124] The activated natural ore powder consists of activated strontium-rich sedimentary rock, activated limestone, and activated magnesite; the activated porous ore powder consists of activated zeolite; the mass ratio of activated strontium-rich sedimentary rock, activated limestone, activated magnesite, and activated zeolite is 3:5:1:1; the first binder is polyvinyl butyral; the second binder is high molecular weight polyethylene powder; the mass fraction of the composite mineralized particles is 15 parts; the mass fraction of the modified activated carbon is 50 parts; and the mass fraction of the second binder is 30 parts.

[0125] The composite mineralized powders of Examples 1-6 and Comparative Examples 1-2 were soaked in deionized water for 1-24 hours. The increase in total dissolved solids (TDS) and the amount of strontium leached were tested. The amounts of calcium and magnesium leached from the composite mineralized powders of Examples 4-6 and Comparative Example 2 were also tested. The test results are shown in Tables 1-6 and 1-6. Figure 2-7 As shown.

[0126] The increase in total dissolved solids (TDS) and the dissolution of strontium, calcium, and magnesium in the composite mineralized particles of Examples 7-10 were tested using deionized water. The test results are shown in Tables 7-9 and 7-9. Figure 8-10 As shown.

[0127] The increase in total dissolved solids (TDS) and the dissolution of strontium, calcium, and magnesium in the composite mineralized particles of Examples 11-16 were tested using deionized water. The test results are shown in Tables 10-12. Figure 11-13 As shown.

[0128] The adjustable mineralized carbon rods of Examples 17-18 and Comparative Examples 3-4 were subjected to rinsing tests using deionized water. The rinsing flow rate was 2 L / min, and the rinsing time was 30 min. The hygienic safety and strontium content in the rinsing water were tested. The calcium and magnesium content in the rinsing water of Examples 18 and Comparative Example 4 were also tested. The test results are shown in Tables 13-15. Figure 14-15 As shown.

[0129] The safety adjustable mineralized carbon rod with dimensions of 30×12×180mm prepared in Example 17 was subjected to PFOA removal test, with 98% pure perfluorooctanoic acid spiked throughout the process.

[0130] Table 1. Increase in TDS after soaking composite mineralized powder

[0131]

[0132]

[0133] Table 2. Strontium leaching amount from composite mineralized powder after immersion.

[0134]

[0135] Table 3. Increase in TDS after soaking composite mineralized powder

[0136]

[0137] Table 4. Strontium dissolution rate after immersion in composite mineralized powder

[0138]

[0139]

[0140] Table 5. Calcium dissolution rate after immersion in composite mineralized powder.

[0141]

[0142] Table 6 Magnesium leaching amount from composite mineralized powder immersion

[0143]

[0144]

[0145] Table 7. Increase in TDS after immersion of composite mineralized particles.

[0146]

[0147] Table 8. Strontium dissolution rate after immersion in composite mineralized particles.

[0148]

[0149] Table 9. Leaching amount of calcium and magnesium from composite mineralized particles during immersion.

[0150]

[0151]

[0152] Table 10 Increase in TDS after immersion of modified composite mineralized particles

[0153]

[0154] Table 11 Strontium leaching amount from modified composite mineralized particles

[0155]

[0156]

[0157] Table 12: Calcium and magnesium leaching amounts from modified composite mineralized particles during immersion.

[0158]

[0159] Table 13 Increase in TDS value of molten charcoal rods after hygienic and safe soaking

[0160]

[0161] Table 14 Strontium content in water for shaped carbon rods

[0162]

[0163]

[0164] Table 15 Calcium and Magnesium Content in Rinsing Molded Carbon Rods

[0165]

[0166] Table 16 Results of PFOA Removal Tests for Calcium and Magnesium Content in Flush Water Using Molded Carbon Rods

[0167] Flow rate (L) Raw water (ng / L) Filtered water (ng / L) Removal rate (%) 5 405 0 100 1500 410 0 100 3000 403 0 100 4500 412 2 99.5 6000 406 3 99.3

[0168] As shown in Tables 1-16, the safe and adjustable mineralized carbon rod prepared by the method of this invention can adsorb activated natural mineral powder through activated porous mineral powder, so that minerals can be steadily dissolved, achieving a first slow release of minerals. Surface treatment with composite mineralized particles can further control the amount of mineral dissolution, achieving a second slow release of minerals. Finally, by mixing with modified activated carbon and a second binder, the modified composite mineralized particles can be effectively adsorbed, controlling the single release amount, and playing a role in the slow release of minerals in three stages. During continuous water flow, it can effectively and slowly release elements such as strontium, calcium, and magnesium, thus achieving composite mineralization of drinking water, and the release amount maintains a dynamic balance within a certain range. This not only increases the content of trace elements in drinking water but also meets the national limit standards for trace elements in natural drinking mineral water. It can also remove new pollutants such as PFOA and PFAS, with a removal rate of over 99%, exhibiting high safety and long service life.

[0169] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0170] The embodiments described above are merely illustrative of several implementations of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A method of making a safety adjustable mineralized carbon rod, characterized in that, The method comprises the following steps: mixing the activated natural mineral powder and the activated porous mineral powder to obtain a composite mineralized powder; mixing the composite mineralized powder and a first binder to granulate to obtain a composite mineralized particle; surface treating the composite mineralized particle to obtain a modified composite mineralized particle; mixing the modified composite mineralized particle, a modified activated carbon and a second binder to shape to obtain a safe adjustable mineralized carbon rod; The activated natural mineral powder is one or more of activated strontium-rich sedimentary rock, activated limestone, activated dolomite, activated Iceland stone and activated magnesite, and the activated porous mineral powder is activated zeolite or activated volcanic rock. When surface treating the composite mineralized particle, the surface treating comprises using a surfactant to surface treat the composite mineralized particle, and the surfactant is 0.5%-2% silane coupling agent KH550 or 0.5%-2% silane coupling agent KH570. The treatment method of the modified activated carbon comprises: pretreating the activated carbon, exposing the pretreated activated carbon to a high-temperature gas environment of 250-300℃ for secondary activation, using a strong oxidant such as hydrogen peroxide, nitric acid or chloric acid to surface chemically modify the secondary activated activated carbon to obtain the modified activated carbon.

2. The method for preparing a safe and adjustable mineralized carbon rod according to claim 1, characterized in that, When mixing the activated natural mineral powder and the activated porous mineral powder, the activated natural mineral powder and the activated porous mineral powder are mixed at a mass ratio of 1-20:

1.

3. The method for preparing a safe and adjustable mineralized carbon rod according to claim 1, characterized in that, When mixing the composite mineralized powder and the first binder, the composite mineralized powder and the first binder are mixed at a mass ratio of 6-12:

1.

4. The method of claim 1, wherein the safety adjustable mineralized carbon rod is prepared by the steps of: When mixing the modified composite mineralized particle, the modified activated carbon and the second binder, the mixing comprises: mixing 5-30 parts of the modified composite mineralized particle, 40-60 parts of the modified activated carbon and 25-40 parts of the second binder by mass.

5. A safety adjustable mineralized carbon rod, characterized by, The safe adjustable mineralized carbon rod is prepared by the preparation method of any one of claims 1-4.

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