A strontium-enriched filter element and a method for preparing the same

Abstract

The present application relates to a kind of strontium-enriched filter element and its preparation method, consisting of the following weight parts of components, modified strontium-rhomboid ore powder 10-15 parts, modified zeolite powder 5-10 parts, modified maifanite powder 10-15, modified mussel shell powder 5-10 parts, silver-loaded ceramic particles 15-30 parts, silver-loaded volcanic rock powder 4-8 parts, coconut shell silver-loaded activated carbon powder 45-80 parts, modified starch-based adhesive 5-12 parts;The preparation method of the strontium-enriched filter element is also disclosed.The filter element of the application can slowly release various trace elements to supplement the human body needs, and can also effectively prevent the problem of secondary pollution caused by bacterial growth in the filter element after long-term use, and the modified starch-based adhesive used can be biodegraded, green and environmentally friendly without pollution;Mussel shell powder realizes waste recycling, with significant environmental and economic benefits.

Description

TECHNICAL FIELD

[0001] The present application relates to a filter core for purifying water, in particular to a strontium-rich filter core and a preparation method thereof. BACKGROUND

[0002] With the improvement of people's living standards, the standard of drinking water is also getting higher and higher, not only requires drinking water to be non-toxic, harmless, and odorless, but also contains certain minerals and trace elements, so as to ensure that people can drink directly and benefit the health of the body. At present, most of the drinking water treatment adopts reverse osmosis technology, and the purified water does not contain minerals or trace elements required by the human body, and long-term drinking will also cause health hazards to the human body. Therefore, some mineralization filter cores appear, and the existing mineralization filter cores are mixed with soluble calcium salt, magnesium salt, potassium salt, sodium salt and viscous soil to granulate, and some are made of ground rock powder such as medical stone, zeolite and tourmaline. The existing mineralization filter cores have poor sterilization capacity, are easy to be contaminated by bacteria, and will cause secondary pollution of water after long-term use. Moreover, the binder used in the preparation of the filter core cannot be biodegraded, and will pollute the environment when the filter core is discarded. SUMMARY

[0003] In view of the existing deficiencies, the present application provides a strontium-rich filter core and a preparation method thereof.

[0004] The technical scheme adopted by the present application to solve its technical problems is: a strontium-rich filter core is composed of the following components by weight fraction: modified strontium-rhomboid ore powder 10-15 parts, modified zeolite powder 5-10 parts, modified medical stone powder 10-15 parts, modified mussel shell powder 5-10 parts, silver-loaded ceramic particles 15-30 parts, silver-loaded volcanic rock powder 4-8 parts, coconut shell silver-loaded activated carbon powder 45-80 parts, and modified starch-based adhesive 5-12 parts. The modified strontium-rhomboid ore powder and the modified zeolite powder are both prepared from a modified liquid, the modified liquid is composed of sulfuric acid and an organic auxiliary agent, the sulfuric acid is sulfuric acid with a concentration of 2-3 mol / L, and the organic auxiliary agent is any one or more of starch, seaweed gel, chitosan gel, and glucose-based resin gel. The modified medical stone powder is prepared by microwave modification after activation at a certain temperature. The modified mussel shell powder is prepared by twice calcination. The silver-loaded ceramic particles are silver-loaded diatom shell ceramic particles or silver-loaded coconut shell ceramic particles with a particle size of 0.4-0.6 mm. The silver-loaded volcanic rock powder is prepared by reacting volcanic rock modified at high temperature with a silver nitrate solution. The coconut shell silver-loaded activated carbon powder is prepared by hydrothermal reaction of coconut shell activated carbon and a silver nitrate solution and then calcination.

[0005] A preparation method of a strontium-rich filter core, comprising the following steps:

[0006] S1, preparing modified strontium-rhombic ore powder, modified zeolite powder, modified geyserite powder, modified mussel shell powder, silver-loaded ceramic particles, silver-loaded pumice powder, and silver-loaded coconut shell activated carbon powder; the modified strontium-rhombic ore powder and the modified zeolite powder are both prepared from a modified liquid, the modified liquid is composed of sulfuric acid and an organic auxiliary agent, the sulfuric acid is sulfuric acid with a concentration of 2-3 mol / L, and the organic auxiliary agent is any one or more of starch, seaweed gel, chitosan gel, and glucose-based resin gel; the modified geyserite powder is prepared by microwave modification after being activated at a certain temperature; the modified mussel shell powder is prepared by twice calcination; the silver-loaded ceramic particles are silver-loaded diatom shell ceramic particles or silver-loaded coconut shell ceramic particles with a particle size of 0.4-0.6 mm; the silver-loaded pumice powder is prepared by reacting pumice modified at high temperature with a silver nitrate solution; and the silver-loaded coconut shell activated carbon powder is prepared by hydrothermal reaction of coconut shell activated carbon with a silver nitrate solution followed by calcination;

[0007] S2, mixing the prepared modified strontium-rhombic ore powder 10-15 parts, the modified zeolite powder 5-10 parts, the modified geyserite powder 10-15 parts, the modified mussel shell powder 5-10 parts, the silver-loaded ceramic particles 15-30 parts, the silver-loaded pumice powder 4-8 parts, and the silver-loaded coconut shell activated carbon powder 45-80 parts according to the weight ratio, and adding the modified starch-based adhesive 5-12 parts during the mixing process to obtain a mixture;

[0008] S3, placing the mixture into a hydraulic mold for sintering, and cooling after sintering to obtain a strontium-rich filter core.

[0009] As a preference, the preparation steps of the modified strontium-rhombic ore powder are as follows:

[0010] S4a, washing the natural strontium-rhombic ore and then adding it into a modified liquid for treatment, the modified liquid is composed of sulfuric acid and an organic auxiliary agent, the sulfuric acid is sulfuric acid with a concentration of 2-3 mol / L, and the organic auxiliary agent is any one or more of starch, seaweed gel, chitosan gel, and glucose-based resin gel;

[0011] S4b, drying the treated strontium-rhombic ore at a temperature of 100-120℃ until the weight is constant, crushing, and sieving through a 180-200 mesh sieve to obtain the modified strontium-rhombic ore powder.

[0012] As a preference, the preparation steps of the modified strontium-rhombic ore powder are as follows:

[0013] S5a, washing the mussel shell and then soaking it in dilute hydrochloric acid for 0.5-1 h, then washing it with pure water, and then drying and crushing the mussel shell, and sieving through an 80-100 mesh sieve to obtain the mussel shell powder;

[0014] S5b, dissolving the mussel shell powder in an excess of sodium silicate solution, and performing a first calcination in a muffle furnace at a temperature of 200-250°C for a time of 35-60 min, and filtering out the solid;

[0015] S5c, performing a second calcination of the filtered-out solid in a muffle furnace at a temperature of 450-580°C for a time of 40-100 min;

[0016] S5d, cooling the second-calcined mussel shell powder to room temperature, and sieving it through a 180-200 mesh screen to obtain the modified mussel shell powder.

[0017] As a preference, the preparation steps of the modified zeolite powder are as follows:

[0018] S6a, washing the natural zeolite and drying it to constant weight at a temperature of 100-110°C;

[0019] S6b, adding the washed and dried zeolite to a modification liquid consisting of sulfuric acid with a concentration of 2-3 mol / L and an organic auxiliary agent, which is any one or more of starch, seaweed gel, chitosan gel, and glucose-based resin gel;

[0020] S6c, washing the treated zeolite and drying it to constant weight at a temperature of 100-120°C, and sieving it through a 180-200 mesh screen to obtain the modified zeolite powder.

[0021] As a preference, the preparation steps of the modified zeolite powder are as follows:

[0022] S7a, washing the natural zeolite and drying it to constant weight at a temperature of 100-110°C, and then crushing it and sieving it through an 80-100 mesh screen to obtain the zeolite powder;

[0023] S7b, activating the zeolite powder at a temperature of 290-310°C for a time of 3.5-4 h;

[0024] S7c, modifying the activated zeolite powder using a microwave intensity of 80% for a time of 10-12 min;

[0025] S7d, ultrasonically cleaning the irradiated zeolite for a time of 2-2.5 h, and then drying it to constant weight in air at a temperature of 120-130°C, and crushing and sieving it through a 180-200 mesh screen to obtain the modified zeolite powder.

[0026] As a preference, the preparation steps of the modified zeolite powder are as follows:

[0027] S8a, washing the natural zeolite and drying it to constant weight, and crushing it to a particle size of 1-2 mm to obtain the zeolite powder;

[0028] S8b, adding the volcanic rock powder into 0.05 mol / L hydrochloric acid and oscillating for 30-35 min, washing with deionized water for multiple times until the pH is 7-7.5 to obtain the preliminarily treated volcanic rock powder;

[0029] S8c, placing the preliminarily treated volcanic rock powder into a muffle furnace and calcining at a temperature of 650-660℃ for 10-15 min;

[0030] S8d, adding the calcined volcanic rock powder into a mixed solution of 0.03 mol / L silver nitrate and 0.15 mol / L zinc nitrate, oscillating at a reaction temperature of 50-55℃ and a pH of 6-8 for 4-4.5 h;

[0031] S8e, drying the reacted volcanic rock powder at a temperature of 150℃ until the constant weight, then placing the dried volcanic rock powder into a muffle furnace, heating from room temperature to 450℃ at a heating rate of 15℃ / min, keeping the temperature for 1 h, and finally cooling to room temperature to obtain the silver-loaded volcanic rock powder.

[0032] As preferred, the preparation steps of the silver-loaded coconut shell activated carbon powder are as follows:

[0033] S9a, selecting coconut shell activated carbon powder, oscillating and washing the same by ultrasonic, drying to constant weight at a constant temperature after removing the surface impurities and dust to obtain treated coconut shell activated carbon powder, and the drying temperature is 100-110℃;

[0034] S9b, reacting the treated coconut shell activated carbon powder with 2.0 g / L silver nitrate solution in a reaction kettle to obtain coconut shell activated carbon powder adsorbed with silver ions, and the reaction temperature is 120-150℃ and the reaction time is 6-8 h;

[0035] S9c, washing the coconut shell activated carbon powder adsorbed with silver ions with distilled water until no silver ions flow out, and then vacuum drying at a temperature of 70-80℃ until the constant weight;

[0036] S9d, calcining the coconut shell activated carbon powder treated in the previous step under nitrogen protection, and the calcining temperature is 500-600℃ and the calcining time is 2-4 h.

[0037] As preferred, the sintering time of the hydraulic mold in step S3 is 30-35 min, the hydraulic temperature is 150-155℃, and the pressure is 14-16 MPa.

[0038] The filter core of the application can slowly release multiple trace elements to supplement the human body, effectively prevent the problem of secondary pollution of water caused by bacterial breeding after long-term use of the filter core, and the modified starch-based adhesive used can be biodegraded, green, environmentally friendly and pollution-free; the mussel shell powder realizes waste recycling, and the microporous structure thereof can well adsorb impurities in water, reducing the dependence on natural minerals, having great environmental and economic benefits, and being simple in raw material source, easy to operate and low in cost. DETAILED DESCRIPTION

[0039] In order to more clearly illustrate the purposes, technical solutions and advantages of the embodiments of the application, the application will be further described below in conjunction with the embodiments, which are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments of the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0040] A strontium-rich filter core and a preparation method thereof, the strontium-rich filter core is composed of the following components in parts by weight: modified strontium-rhomboid ore powder 10-15 parts, modified zeolite powder 5-10 parts, modified maifanite powder 10-15 parts, modified mussel shell powder 5-10 parts, silver-loaded ceramic particles 15-30 parts, silver-loaded volcanic rock powder 4-8 parts, coconut shell silver-loaded activated carbon powder 45-80 parts, and modified starch-based adhesive 5-12 parts. The modified strontium-rhomboid ore powder and the modified zeolite powder are both prepared from a modified liquid; the modified maifanite powder is prepared by microwave modification after being activated at a certain temperature; the modified mussel shell powder is prepared by twice calcination; the silver-loaded ceramic particles are one or both of silver-loaded diatom shell ceramic particles or silver-loaded coconut shell ceramic particles with a particle size of 0.4-0.6 mm; the silver-loaded volcanic rock powder is prepared by reacting volcanic rock modified at high temperature with a silver nitrate solution; the coconut shell silver-loaded activated carbon powder is prepared by hydrothermal reaction of coconut shell activated carbon and a silver nitrate solution followed by calcination; and the modified starch-based adhesive is modified by different modification methods such as oxidation modification, esterification modification, crosslinking modification and grafting modification on the basis of existing starch-based adhesives, so as to ensure the cementation of the starch-based adhesive.

[0041] The preparation steps are as follows:

[0042] S1, preparing modified strontium-rhomboid ore powder, modified zeolite powder, modified maifanite powder, modified mussel shell powder, silver-loaded ceramic particles, silver-loaded volcanic rock powder and coconut shell silver-loaded activated carbon powder;

[0043] The preparation steps of the modified strontium-rhomboid ore powder are as follows:

[0044] S4a, after the natural strontium ore is washed, it is added to a modified liquid for treatment, the modified liquid is composed of sulfuric acid and an organic auxiliary agent, the sulfuric acid is sulfuric acid with a concentration of 2-3 mol / L, and the organic auxiliary agent is any one or more of starch, seaweed gel, chitosan gel, and glucose-based resin gel; in the embodiment, the concentration of sulfuric acid is 2.2 mol / L, the organic auxiliary agent is starch, the amount of organic auxiliary agent and sulfuric acid is 1 g:3.5 ml, and the amount of strontium ore and modified liquid is mixed in a manner of 1 g:5 ml, after mixing, stirring is carried out at a temperature of 75°C for 1.5 h, and then filtration is carried out to obtain modified strontium ore.

[0045] S4b, after the treated strontium ore is washed, it is dried at a temperature of 100-120°C to constant weight, crushed and sieved through a 180-200 mesh sieve to obtain modified strontium ore powder; the drying temperature is selected to be 110°C, after drying to constant weight, the temperature is lowered to room temperature, and then the modified strontium ore powder is obtained by crushing and sieving through a 180-200 mesh sieve.

[0046] The preparation steps of the modified mussel shell powder are as follows:

[0047] S5a, after the mussel shell is washed, it is soaked in dilute hydrochloric acid for 0.5-1 h, then washed with pure water, and then dried and crushed, and sieved through an 80-100 mesh sieve to obtain mussel shell powder; the natural mussel shell is selected, the use of natural ore is reduced, and the pollution problem of the coastal ecological environment caused by the mussel shell is solved, the mussel shell can be a single species or a mixture of multiple species, the collected mussel shell is soaked in dilute hydrochloric acid for 0.5-1 h to remove impurities on the surface of the mussel shell, the soaking time is adjusted according to the condition of the collected mussel shell, the more impurities on it, the longer the soaking time, after soaking, it is washed with pure water to remove excess acid and impurities, after washing, it is dried at a temperature of 100°C, and then crushed in a high-speed crusher, and finally sieved through an 80-100 mesh sieve to obtain mussel shell powder.

[0048] S5b, the mussel shell powder is dissolved in an excess of sodium silicate solution, and primary calcination is carried out in a muffle furnace, the temperature of the primary calcination is 200-250°C, and the time is 35-60 min, and the solid is filtered out; in the embodiment, the temperature is selected to be 230°C, and the time is 50 min.

[0049] S5c, the filtered solid is subjected to secondary calcination in a muffle furnace, the temperature of the secondary calcination is 450-580°C, and the time is 40-100 min; in the secondary calcination, the sodium silicate solution is removed, the calcination temperature in the embodiment is selected to be 500°C, and the time is 70 min.

[0050] S5d, cooling the mussel shell powder after secondary calcination to room temperature, and preparing modified mussel shell powder by passing through a 180-200 mesh sieve;

[0051] The preparation steps of the modified zeolite powder are as follows:

[0052] S6a, drying the natural zeolite to constant weight at a temperature of 100-110°C after washing; in the examples, 110°C is selected for drying, and the natural zeolite is washed to remove impurities on the surface of the natural zeolite.

[0053] S6b, adding the washed and dried zeolite to a modification liquid for treatment, wherein the modification liquid is composed of sulfuric acid and an organic auxiliary agent, the sulfuric acid is sulfuric acid with a concentration of 2-3 mol / L, and the organic auxiliary agent is any one or more of starch, seaweed gel, chitosan gel, and glucose-based resin gel; in the examples, the concentration of sulfuric acid is selected to be 2.5 mol / L, the organic auxiliary agent is a mixture of starch and seaweed gel, the starch and seaweed gel are mixed in a weight ratio of 1:1, the amount of organic auxiliary agent and sulfuric acid is mixed in a ratio of 1g:4ml, and the ratio of zeolite and modification liquid is mixed in a ratio of 1g:5ml, stirring at a temperature of 75°C for 1.5h, and then filtering to obtain the modified zeolite.

[0054] S6c, drying the treated zeolite to constant weight at 100-120°C after washing, crushing, and passing through a 180-200 mesh sieve to obtain modified zeolite powder; the treated zeolite, i.e., the modified zeolite, is washed with pure water, dried to constant weight at 110°C, then crushed, and passed through a 200 mesh sieve to obtain modified zeolite powder.

[0055] The preparation steps of the modified zeolite powder are as follows:

[0056] S7a, drying the natural zeolite to constant weight at a temperature of 100-110°C after washing, and then crushing and passing through an 80-100 mesh sieve to obtain zeolite powder; in this step, the natural zeolite is washed with water to remove impurities on the surface of the natural zeolite, and then dried to constant weight at a temperature of 100°C, and then crushed and passed through a 100 mesh sieve.

[0057] S7b, activating the zeolite powder at a temperature of 290-310°C for 3.5-4h; in the examples, the activation temperature is selected to be 300°C, and the activation time is 4h.

[0058] S7c, modifying the activated zeolite powder using a microwave intensity of 80% for 10-12min;

[0059] S7d, the modified zeolite powder was prepared by ultrasonic cleaning the irradiated zeolite for 2-2.5 h, then drying in air at a temperature of 120-130℃ to constant weight, crushing and passing through a 180-200 mesh sieve; the ultrasonic cleaning further washed away the impurities in the zeolite, and in the example, the ultrasonic cleaning time was 2 h, the zeolite was filtered out and dried at a temperature of 120℃ to constant weight, and finally crushed and passed through a 200 mesh sieve.

[0060] The preparation steps of the silver-loaded volcanic rock powder are as follows:

[0061] S8a, the natural volcanic rock was washed and dried to constant weight, and crushed to a particle size of 1-2 mm to prepare the volcanic rock powder; drying at a temperature of 100℃.

[0062] S8b, the volcanic rock powder was added to 0.05 mol / L hydrochloric acid and shaken for 30-35 min, and washed with deionized water multiple times until the pH was 7-7.5 to obtain the preliminary treated volcanic rock powder;

[0063] S8c, the preliminary treated volcanic rock powder was placed in a muffle furnace and calcined at a temperature of 650-660℃ for 10-15 min; in the example, the calcination temperature was selected to be 650℃, and the time was 15 min;

[0064] S8d, the calcined volcanic rock powder was added to a mixed solution of 0.03 mol / L silver nitrate and 0.15 mol / L zinc nitrate, and shaken for 4-4.5 h at a reaction temperature of 50-55℃ and a pH of 6-8; in the example, the reaction temperature was 50℃, and the reaction time was 4.5 h;

[0065] S8e, the reacted volcanic rock powder was dried at a temperature of 150℃ to constant weight, then the dried volcanic rock powder was again placed in a muffle furnace, heated from room temperature to 450℃ at a heating rate of 15℃ / min, held for 1 h, and finally cooled to room temperature to obtain the silver-loaded volcanic rock powder;

[0066] The preparation steps of the silver-loaded coconut shell activated carbon powder are as follows:

[0067] S9a, the coconut shell activated carbon powder was selected and ultrasonically washed to remove surface impurities and dust, and then dried to constant weight at a constant temperature to obtain the treated coconut shell activated carbon powder; the drying temperature was 100-110℃; in the example, the drying temperature was selected to be 110℃;

[0068] S9b, the treated coconut shell activated carbon powder was reacted with a 2.0 g / L silver nitrate solution in a reaction kettle to obtain the coconut shell activated carbon powder adsorbed with silver ions; the reaction temperature was 120-150℃, and the reaction time was 6-8 h; in the example, the concentration of the silver nitrate solution was selected to be 2.0 g / L, the reaction temperature was 120℃, and the reaction time was 6 h;

[0069] S9c, the coconut shell activated carbon powder adsorbing silver ions is washed with distilled water until no silver ions flow out, and then vacuum dried at a temperature of 70-80°C until a constant weight is obtained; in the example, the drying temperature is 75°C;

[0070] S9d, the coconut shell activated carbon powder treated in the previous step is calcined under nitrogen protection, the calcination temperature is 500-600°C, and the calcination time is 2-4h; in the example, the calcination temperature is 500°C, and the calcination time is 2.5h.

[0071] S2, the prepared modified strontium-rhombic ore powder 10-15 parts, modified zeolite powder 5-10 parts, modified maifanite powder 10-15 parts, modified mussel shell powder 5-10 parts, silver-loaded ceramic particles 15-30 parts, silver-loaded volcanic rock powder 4-8 parts, and coconut shell silver-loaded activated carbon powder 45-80 parts are mixed according to the weight ratio, and modified starch-based adhesive 5-12 parts is added during the mixing process to obtain a mixture; in Example 1, modified strontium-rhombic ore powder 20g, modified zeolite powder 16g, modified maifanite powder 20g, modified mussel shell powder 16g, silver-loaded ceramic particles 30g, silver-loaded volcanic rock powder 10g, and coconut shell silver-loaded activated carbon powder 120g are mixed, and modified starch-based adhesive 16g is added during the mixing process; in Example 2, modified strontium-rhombic ore powder 30g, modified zeolite powder 16g, modified maifanite powder 20g, modified mussel shell powder 20g, silver-loaded ceramic particles 30g, silver-loaded volcanic rock powder 16g, and coconut shell silver-loaded activated carbon powder 150g are mixed, and modified starch-based adhesive 16g is added during the mixing process;

[0072] S3, the mixture is placed into a hydraulic mold for sintering, and after sintering, a strontium-rich filter element is obtained by cooling; in the step S3, the sintering time of the hydraulic mold is 30-35min, the hydraulic temperature is 150-155°C, and the pressure is 14-16MPa; in Example 1 and Example 2, the sintering time is 30min, the sintering temperature is 150°C, and the pressure is 15MPa, and the formed strontium-rich filter element is obtained after sintering.

[0073] The filter elements prepared in Example 1 and Example 2 are rinsed with pure water for 10min, then a continuous water test is performed using an 800G RO machine (flow rate 1.2-1.8L / min), and the strontium content in each sample is measured every 500L, and the strontium content is measured six times in succession, in Example 1, the average increase of strontium content is 1.12mg / L, and in Example 2, the average increase of strontium content is 1.40mg / L, which is more than 6 times the standard of natural mineral water.

[0074] It should be understood that those skilled in the art can make improvements or changes according to the above description, and all these improvements and changes shall belong to the protection scope of the appended claims of the present application.

Claims

1. A strontium-enriched filter cartridge, characterized by: The modified strontium rhombohedral ore powder 10-15 parts, the modified zeolite powder 5-10 parts, the modified geyserite powder 10-15 parts, the modified mussel shell powder 5-10 parts, the silver-loaded ceramic particles 15-30 parts, the silver-loaded pumice powder 4-8 parts, the coconut shell silver-loaded activated carbon powder 45-80 parts, and the modified starch-based adhesive 5-12 parts are mixed according to the weight ratio, and the modified starch-based adhesive is added during the mixing process to obtain a mixture. The modified strontium rhombohedral ore powder, the modified zeolite powder, and the modified geyserite powder are all prepared from a modified liquid, wherein the modified liquid is composed of sulfuric acid and an organic auxiliary agent, the sulfuric acid is sulfuric acid with a concentration of 2-3 mol / L, and the organic auxiliary agent is any one or more of starch, seaweed gel, chitosan gel, and glucose-based resin gel; the modified mussel shell powder is prepared by twice calcination; the silver-loaded ceramic particles are silver-loaded diatom shell ceramic particles or silver-loaded coconut shell ceramic particles with a particle size of 0.4-0.6 mm; the silver-loaded pumice powder is prepared by reacting pumice modified at high temperature with a silver nitrate solution; and the coconut shell silver-loaded activated carbon powder is prepared by hydrothermal reaction of coconut shell activated carbon and a silver nitrate solution followed by calcination.

2. A method of producing a strontium-enriched filter element, characterized by The method comprises the following steps: S1, preparing the modified strontium rhombohedral ore powder, the modified zeolite powder, the modified geyserite powder, the modified mussel shell powder, the silver-loaded ceramic particles, the silver-loaded pumice powder, and the coconut shell silver-loaded activated carbon powder; the modified strontium rhombohedral ore powder and the modified zeolite powder are both prepared from a modified liquid, wherein the modified liquid is composed of sulfuric acid and an organic auxiliary agent, the sulfuric acid is sulfuric acid with a concentration of 2-3 mol / L, and the organic auxiliary agent is any one or more of starch, seaweed gel, chitosan gel, and glucose-based resin gel; the modified geyserite powder is prepared by microwave modification after activation at a certain temperature; The modified mussel shell powder is prepared by twice calcination; the silver-loaded ceramic particles are silver-loaded diatom shell ceramic particles or silver-loaded coconut shell ceramic particles with a particle size of 0.4-0.6 mm; the silver-loaded pumice powder is prepared by reacting pumice modified at high temperature with a silver nitrate solution; and the coconut shell silver-loaded activated carbon powder is prepared by hydrothermal reaction of coconut shell activated carbon and a silver nitrate solution followed by calcination; S2, mixing the prepared modified strontium rhombohedral ore powder 10-15 parts, the modified zeolite powder 5-10 parts, the modified geyserite powder 10-15 parts, the modified mussel shell powder 5-10 parts, the silver-loaded ceramic particles 15-30 parts, the silver-loaded pumice powder 4-8 parts, and the coconut shell silver-loaded activated carbon powder 45-80 parts according to the weight ratio and adding the modified starch-based adhesive 5-12 parts during the mixing process to obtain a mixture; S3, placing the mixture into a hydraulic mold for sintering, and then cooling after sintering to obtain a strontium-rich filter element.

3. The method for preparing the strontium-rich filter element according to claim 2, characterized in that... The preparation steps of the modified strontium rhombohedral ore powder are as follows: S4a, washing the natural strontium rhombohedral ore and then adding it into a modified liquid for treatment, wherein the modified liquid is composed of sulfuric acid and an organic auxiliary agent, the sulfuric acid is sulfuric acid with a concentration of 2-3 mol / L, and the organic auxiliary agent is any one or more of starch, seaweed gel, chitosan gel, and glucose-based resin gel; S4b, the processed strontium ore is washed, dried at a temperature of 100-120℃ until constant weight, crushed and sieved through a 180-200 mesh screen to obtain the modified strontium ore powder.

4. The method of claim 2, wherein the strontium-enriched filter is prepared by the steps of: The preparation steps of the modified mussel shell powder are as follows: ​ S5a, the mussel shell is washed, soaked in dilute hydrochloric acid for 0.5-1h, then washed with pure water, and then dried and crushed, and sieved through an 80-100 mesh screen to obtain the mussel shell powder; S5b, the mussel shell powder is dissolved in an excess of sodium silicate solution, and primary calcination is performed in a muffle furnace, the temperature of the primary calcination is 200-250℃, and the time is 35-60min, and the solid is filtered out; S5c, the filtered solid is subjected to secondary calcination in a muffle furnace, the temperature of the secondary calcination is 450-580℃, and the time is 40-100min; S5d, the secondary calcined mussel shell powder is cooled to room temperature, sieved through a 180-200 mesh screen to obtain the modified mussel shell powder.

5. The method of claim 2, wherein the strontium-enriched filter is prepared by the steps of: The preparation steps of the modified zeolite powder are as follows: ​ S6a, the natural zeolite is washed and dried at a temperature of 100-110℃ until constant weight; S6b, the washed and dried zeolite is added to a modification liquid, the modification liquid is composed of sulfuric acid and an organic auxiliary agent, the sulfuric acid is sulfuric acid with a concentration of 2-3mol / L, and the organic auxiliary agent is any one or more of starch, seaweed gel, chitosan gel, and glucose-based resin gel; S6c, the treated zeolite is washed, dried at a temperature of 100-120℃ until constant weight, crushed and sieved through a 180-200 mesh screen to obtain the modified zeolite powder.

6. The method of claim 2, wherein: The preparation steps of the modified zeolite powder are as follows: S7a, the natural zeolite is washed and dried at a temperature of 100-110℃ until constant weight, then crushed and sieved through an 80-100 mesh screen to obtain the zeolite powder; S7b, the zeolite powder is activated at a temperature of 290-310℃ for 3.5-4h; S7c, the activated zeolite powder is modified using a microwave intensity of 80% for 10-12min; S7d, the irradiated zeolite is ultrasonically cleaned for 2-2.5h, then dried in air at a temperature of 120-130℃ until constant weight, crushed and sieved through a 180-200 mesh screen to obtain the modified zeolite powder.

7. The method of claim 2, wherein the strontium-enriched filter is prepared by the steps of: The preparation steps of the silver-loaded volcanic rock powder are as follows: ​ S8a, the natural volcanic rock is washed and dried until constant weight, and crushed to a particle size of 1-2mm to obtain the volcanic rock powder; S8b, the volcanic rock powder is added to 0.05mol / L hydrochloric acid and shaken for 30-35min, and washed with deionized water multiple times until the pH is 7-7.5 to obtain the preliminarily treated volcanic rock powder; S8c, the preliminarily treated volcanic rock powder is placed in a muffle furnace and calcined at a temperature of 650-660℃ for 10-15min; S8d, the calcined volcanic rock powder is added to a mixed solution of 0.03mol / L silver nitrate and 0.15mol / L zinc nitrate, and shaken for 4-4.5h at a reaction temperature of 50-55℃ and a pH of 6-8; S8e, the volcanic rock powder after reaction is dried at a temperature of 150 DEG C until constant weight, then the dried volcanic rock powder is placed in the muffle furnace again, heated from room temperature to 450 DEG C at a heating rate of 15 DEG C / min, kept for 1 h, and finally cooled to room temperature to obtain the silver-loaded volcanic rock powder.

8. The method of claim 2, wherein the strontium-enriched filter is prepared by the steps of: The preparation steps of the silver-loaded coconut shell activated carbon powder are as follows: ​ S9a, the coconut shell activated carbon powder is selected and washed by ultrasonic oscillation to remove the surface impurities and floating dust, and then dried at a constant temperature until constant weight to obtain the treated coconut shell activated carbon powder, and the drying temperature is 100-110 DEG C; S9b, the treated coconut shell activated carbon powder is reacted with 2.0 g / L silver nitrate solution in a reaction kettle to obtain the coconut shell activated carbon powder adsorbed with silver ions, and the reaction temperature is 120-150 DEG C and the reaction time is 6-8 h; S9c, the coconut shell activated carbon powder adsorbed with silver ions is washed with distilled water until no silver ions flow out, and then vacuum dried at a temperature of 70-80 DEG C until constant weight; S9d, the coconut shell activated carbon powder treated in the previous step is calcined under nitrogen protection, and the calcination temperature is 500-600 DEG C and the calcination time is 2-4 h.

9. The method of claim 3, wherein the strontium-enriched filter is prepared by the steps of: In step S3, the sintering time of the hydraulic mold is 30-35 min, the hydraulic temperature is 150-155 DEG C, and the pressure is 14-16 MPa. ​