Water purifying agent as well as preparation method and use method thereof

Abstract

The invention provides a water purifying agent as well as a preparation method and a use method thereof, and belongs to the technical field of water purifying materials. The water purifying agent provided by the invention is prepared from the following raw materials: calcium magnesium silicate minerals, activated carbon, clay minerals, ferric oxide and an inorganic solvent, the mass ratio of the calcium magnesium silicate mineral to the activated carbon to the clay mineral to the ferric oxide is (2-3): (4-5): (1-2): (1-2). The calcium magnesium silicate mineral, the activated carbon, the clay mineral and the ferric oxide can synergistically improve the purification effect of the water purifying agent, and the calcium magnesium silicate mineral removes pollutants in water through adsorption and ion exchange; the activated carbon has a huge specific surface area and a developed pore structure, and can remove organic matters and peculiar smell substances in water through physical adsorption; the clay mineral has a layered structure and can remove organic matters and other impurities in water through adsorption and ion exchange; the surface of ferric oxide contains a large number of hydroxyl groups, and pollutants in water are removed through precipitation and adsorption.

Description

Technical Field

[0001] The present invention belongs to the technical field of water purification materials, and particularly relates to a water purifying agent and its preparation method and usage method. Background Art

[0002] For refractory wastewater, the existing treatment methods mainly include the adsorption method, which is an efficient and economical water treatment technology. The main purifying agent used is activated carbon, but its purification effect is poor. Therefore, how to improve the purification effect of the purifying agent has become a technical problem to be solved urgently in this field. Summary of the Invention

[0003] The purpose of the present invention is to provide a water purifying agent and its preparation method and usage method. The water purifying agent provided by the present invention has excellent purification effect.

[0004] In order to achieve the above-mentioned invention purpose, the present invention provides the following technical solutions: The present invention provides a water purifying agent, which comprises the following raw materials: calcium magnesium silicate mineral, activated carbon, clay mineral, iron oxide and inorganic solvent; The mass ratio of the calcium magnesium silicate mineral, activated carbon, clay mineral and iron oxide is (2 - 3):(4 - 5):(1 - 2):(1 - 2).

[0005] Preferably, the clay mineral comprises at least one of kaolin and bentonite.

[0006] Preferably, the particle sizes of the clay mineral, activated carbon and iron oxide are independently 800 - 1200 mesh.

[0007] Preferably, the particle size of the calcium magnesium silicate mineral is 600 - 1000 mesh.

[0008] Preferably, the mass ratio of the total mass of the calcium magnesium silicate mineral, activated carbon, clay mineral and iron oxide to the mass of the inorganic solvent is 1:(0.5 - 1).

[0009] Preferably, the particle size of the water purifying agent is 200 - 300 mesh.

[0010] The present invention also provides a preparation method of the water purifying agent according to the above technical solution, which comprises the following steps: Mix the calcium magnesium silicate mineral, activated carbon, clay mineral, iron oxide and inorganic solvent, and carry out granulation and calcination in sequence to obtain the water purifying agent.

[0011] Preferably, the temperature of the calcination is 600 - 800 °C, and the time of the calcination is 20 - 40 min.

[0012] The present invention also provides a method for using the water purifying agent described in the above technical solution or the water purifying agent prepared by the preparation method described in the above technical solution, including: mixing the water to be treated, the water purifying agent and the flocculant, and then allowing it to settle statically.

[0013] Preferably, the volume ratio of the water to be treated to the mass of the water purifying agent is 1000 mL: (0.1 - 20) g.

[0014] The present invention provides a water purifying agent, which comprises the following raw materials: calcium magnesium silicate mineral, activated carbon, clay mineral, iron oxide and inorganic solvent; the mass ratio of the calcium magnesium silicate mineral, activated carbon, clay mineral and iron oxide is (2 - 3): (4 - 5): (1 - 2): (1 - 2). In the present invention, the calcium magnesium silicate mineral, activated carbon, clay mineral and iron oxide can synergistically improve the purification effect of the water purifying agent. Among them, the calcium magnesium silicate mineral removes pollutants in water through adsorption and ion exchange; the activated carbon has a huge specific surface area and a developed pore structure, and can effectively remove organic substances and odor substances in water through physical adsorption; the clay mineral has a layered structure, a relatively large interlayer distance and exchangeable cations, and can remove organic substances and other impurities in water through adsorption and ion exchange; the surface of the iron oxide contains a large number of hydroxyl functional groups, and removes pollutants in water through precipitation and adsorption. The experimental results show that after treating the MBR effluent of the landfill leachate with the water purifying agent provided by the present invention, the COD is 57 mg / L, and it is transparent and colorless. Detailed implementation manners

[0015] The present invention provides a water purifying agent, which comprises the following raw materials: calcium magnesium silicate mineral, activated carbon, clay mineral, iron oxide and inorganic solvent; The mass ratio of the calcium magnesium silicate mineral, activated carbon, clay mineral and iron oxide is (2 - 3): (4 - 5): (1 - 2): (1 - 2).

[0016] The present invention has no special limitation on the sources of each raw material, and commercially available products well-known to those skilled in the art can be used.

[0017] The raw materials for preparing the water purifying agent provided by the present invention include calcium magnesium silicate mineral; the particle size of the calcium magnesium silicate mineral is preferably 600 - 1000 mesh. In the present invention, the calcium magnesium silicate mineral removes pollutants in water through adsorption and ion exchange.

[0018] As an implementation manner, the particle size of the calcium magnesium silicate mineral can be 700 mesh, 800 mesh or 900 mesh.

[0019] In the present invention, the chemical composition of the calcium magnesium silicate mineral preferably comprises, by mass percentage, 45-55% of O, 20-30% of C, 7-10% of Si, 4-6% of Ca, 3-6% of Mg, 0.4-0.7% of F, 0.1-3% of Fe, and 0.4-7% of Al.

[0020] As an embodiment, the chemical composition of the calcium magnesium silicate mineral, by mass percentage, can be 53.74% of O, 25.74% of C, 9.33% of Si, 5.21% of Ca, 4.49% of Mg, 0.66% of F, 0.2% of Fe, and 0.63% of Al.

[0021] The raw materials for preparing the water purifying agent provided by the present invention include activated carbon; the particle size of the activated carbon is preferably 800-1200 mesh. In the present invention, the activated carbon has a huge specific surface area and a developed pore structure, and can effectively remove organic substances and odor substances in water through physical adsorption.

[0022] In the present invention, the particle size of the activated carbon can be 900 mesh, 1000 mesh, or 1100 mesh.

[0023] The raw materials for preparing the water purifying agent provided by the present invention include clay minerals; the particle size of the clay minerals is preferably 800-1200 mesh; the clay minerals preferably include at least one of kaolin and bentonite, and more preferably kaolin. In the present invention, the clay minerals have a layered structure, a relatively large interlayer distance and exchangeable cations, and can remove organic substances and other impurities in water through adsorption and ion exchange.

[0024] In the present invention, the particle size of the clay minerals can be 900 mesh, 1000 mesh, or 1100 mesh.

[0025] The raw materials for preparing the water purifying agent provided by the present invention include iron oxide; the particle size of the iron oxide is preferably 800-1200 mesh. In the present invention, a large number of hydroxyl functional groups are contained on the surface of the iron oxide, and pollutants in water are removed through precipitation and adsorption.

[0026] In the present invention, the particle size of the iron oxide can be 900 mesh, 1000 mesh, or 1100 mesh.

[0027] In the present invention, the mass ratio of the calcium magnesium silicate mineral, activated carbon, clay minerals, and iron oxide is (2-3):(4-5):(1-2):(1-2). Limiting the mass ratio of the calcium magnesium silicate mineral, activated carbon, clay minerals, and iron oxide within the above range can further improve the purification effect of the water purifying agent.

[0028] The raw materials for preparing the water purifying agent provided by the present invention include an inorganic solvent; the inorganic solvent is preferably water; the mass ratio of the total mass of calcium magnesium silicate mineral, activated carbon, clay mineral and iron oxide to the mass of the inorganic solvent is preferably 1:(0.5-1). As an implementation mode, the mass ratio of the total mass of calcium magnesium silicate mineral, activated carbon, clay mineral and iron oxide to the mass of the inorganic solvent can be 1:0.6, 1:0.7, 1:0.8 or 1:0.9. In the present invention, the inorganic solvent is used to dissolve each raw material.

[0029] In the present invention, the particle size of the water purifying agent is preferably 200-300 mesh.

[0030] In the present invention, calcium magnesium silicate mineral, activated carbon, clay mineral and iron oxide can synergistically improve the purification effect of the water purifying agent. Among them, calcium magnesium silicate mineral removes pollutants in water through adsorption and ion exchange; activated carbon has a huge specific surface area and a developed pore structure, and can effectively remove organic substances and odor substances in water through physical adsorption; clay mineral has a layered structure, a relatively large interlayer distance and exchangeable cations, and can remove organic substances and other impurities in water through adsorption and ion exchange; the surface of iron oxide contains a large number of hydroxyl functional groups, and removes pollutants in water through precipitation and adsorption.

[0031] The water purifying agent provided by the present invention has high removal efficiency and stable effect, and the removal rates of COD, chromaticity and odor are up to over 90%; the reaction is fast, the precipitation is fast, and the reaction and precipitation time are both ≤ 30 min; it is environmentally friendly, through physical adsorption, without chemical products, without adjusting acid or alkali, the product has no risk of secondary pollution, less sludge production, non-toxic and easy to dispose; it is safe, synthesized from inorganic raw materials, non-toxic and harmless; it is easy to transport and store, without the risk of combustion and explosion; it has universality, is not affected by water quality such as water temperature and pH value, and is applicable to various refractory high-chromaticity wastewaters such as landfill leachate, membrane concentrate, coking wastewater, printing and dyeing wastewater, hardware surface treatment wastewater, electroplating wastewater and pharmaceutical wastewater.

[0032] The present invention uses natural or common raw materials, can efficiently remove various refractory pollutants in water, has a high adsorption capacity and a low use cost, and has strong market competitiveness.

[0033] Compared with NF+RO+concentrate evaporation crystallization, the process is greatly simplified. At the same time, the water production rate exceeds 85%, no concentrate is generated, the treatment cost does not exceed 30 yuan per ton of water, and the problems of concentrate and high cost are completely solved.

[0034] The Fenton process (biochemical + MBR + primary Fenton + secondary Fenton or biochemical + MBR + Fenton + biochemical) must use hazardous chemicals such as strong acids and strong bases, which makes the process control difficult and results in unstable treatment effects. At the same time, involving hazardous chemicals such as strong acids and strong bases, the storage and management procedures are complex and the management cost is high. In addition, a large amount of chemical sludge is generated during the treatment process. If it is disposed of as hazardous waste, the disposal cost exceeds 1000 yuan / ton. The present invention is simpler than the Fenton process, does not require acid or base adjustment, is not affected by the influent pH value, is more stable and reliable, and does not involve the storage and management of hazardous chemicals such as strong acids and strong bases, does not generate chemical sludge, and has less sludge volume and low disposal cost.

[0035] The present invention also provides a preparation method of the water purifying agent described in the above technical solution, comprising the following steps: Mix calcium magnesium silicate minerals, activated carbon, clay minerals, iron oxide and an inorganic solvent, and successively carry out granulation and calcination to obtain the water purifying agent.

[0036] The present invention has no special limitation on the operation of mixing the calcium magnesium silicate minerals, activated carbon, clay minerals, iron oxide and the inorganic solvent, and the technical solutions for preparing the mixed material well-known to those skilled in the art can be adopted.

[0037] The present invention has no special limitation on the operation of the granulation, and the operations well-known to those skilled in the art can be adopted.

[0038] In the present invention, the temperature of the calcination is preferably 600 - 800 °C; the time of the calcination is preferably 20 - 40 min. As an implementation manner, the temperature of the calcination can be 650 °C, 700 °C or 750 °C; the time of the calcination can be 25 min, 30 min or 35 min.

[0039] After the calcination is completed, the present invention preferably cools and grinds the product obtained by the calcination successively to obtain the water purifying agent.

[0040] For the operation of the cooling in the present invention, the operations well-known to those skilled in the art can be adopted to cool to below 40 °C.

[0041] The present invention has no special limitation on the operation of the grinding, as long as the particle size of the water purifying agent is within the range of 200 - 300 mesh.

[0042] The preparation method provided by the present invention has a simple process and is suitable for industrial production.

[0043] The present invention also provides a using method of the water purifying agent described in the above technical solution or the water purifying agent prepared by the preparation method described in the above technical solution, comprising: mixing the water to be treated, the water purifying agent and a flocculant, and then statically settling.

[0044] The present invention places no special limitation on the source of the water to be treated, and refractory wastewater well-known to those skilled in the art can be used.

[0045] In the present invention, the flocculant is preferably a polyacrylamide (PAM) solution; the mass concentration of the polyacrylamide solution is preferably 0.1 - 0.3%. As an implementation manner, the mass concentration of the polyacrylamide solution can be 0.1%, 0.2% or 0.3%.

[0046] In the present invention, the ratio of the volume of the water to be treated to the mass of the water purifying agent is preferably 1000 mL : (0.1 - 20) g; the ratio of the volume of the water to be treated to the volume of the flocculant is preferably 1000 : (1 - 10). Limiting the ratio of the volume of the water to be treated to the mass of the water purifying agent and the ratio of the volume of the water to be treated to the volume of the flocculant within the above ranges in the present invention can further improve the purification effect.

[0047] As an implementation manner, the ratio of the volume of the water to be treated to the mass of the water purifying agent can be 1000 mL : 1 g, 1000 mL : 2 g, 1000 mL : 3 g, 1000 mL : 4 g, 1000 mL : 5 g, 1000 mL : 6 g, 1000 mL : 7 g, 1000 mL : 8 g, 1000 mL : 9 g, 1000 mL : 10 g or 1000 mL : 15 g; the ratio of the volume of the water to be treated to the volume of the flocculant can be 1000 : 1, 1000 : 2, 1000 : 3, 1000 : 4, 1000 : 5, 1000 : 6, 1000 : 7, 1000 : 8 or 1000 : 9.

[0048] In the present invention, the mixing of the water to be treated, the water purifying agent and the flocculant is preferably to first mix the water to be treated and the water purifying agent, and then add the flocculant for second mixing.

[0049] In the present invention, the time of the first mixing is preferably 20 - 30 min; the first mixing is preferably carried out under stirring conditions. The present invention places no special limitation on the temperature of the first mixing, and it can be carried out at room temperature. The present invention places no special limitation on the rotation speed of the stirring, as long as the mixing is uniform.

[0050] As an implementation manner, the time of the first mixing can be 22 min, 24 min, 26 min or 28 min.

[0051] In the present invention, the time of the second mixing is preferably 1 - 2 min; the second mixing is preferably carried out under stirring conditions. The present invention places no special limitation on the temperature of the second mixing, and it can be carried out at room temperature. The present invention places no special limitation on the rotation speed of the stirring, as long as the mixing is uniform.

[0052] As an implementation manner, the time for the second mixing can be 1.5 min.

[0053] In the present invention, the time for static sedimentation is preferably 20 - 30 min. The present invention has no special limitation on the temperature for static sedimentation, and it can be carried out at room temperature.

[0054] As an implementation manner, the time for static sedimentation can be 22 min, 24 min, 26 min or 28 min.

[0055] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the embodiments in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the protection scope of the present invention.

[0056] Example 1 The water purifying agent is composed of the following raw materials: calcium magnesium silicate mineral, activated carbon, clay mineral, iron oxide and inorganic solvent; The mass ratio of the calcium magnesium silicate mineral, activated carbon, clay mineral and iron oxide is 3:4:2:1; The clay mineral is kaolin; The particle size of the calcium magnesium silicate mineral is 800 mesh; The chemical composition of the calcium magnesium silicate mineral is, by mass percentage: O 53.74%, C 25.74%, Si 9.33%, Ca 5.21%, Mg 4.49%, F 0.66%, Fe 0.2% and Al 0.63%; The particle size of the activated carbon is 1000 mesh; The particle size of the clay mineral is 1000 mesh; The particle size of the iron oxide is 1000 mesh; The inorganic solvent is tap water; The mass ratio of the total mass of the calcium magnesium silicate mineral, activated carbon, clay mineral and iron oxide to the mass of the inorganic solvent is 1:1; The particle size of the water purifying agent is 200 - 300 mesh; The preparation method of the water purifying agent comprises the following steps: Put the calcium magnesium silicate mineral, activated carbon, clay mineral and iron oxide into a mixing tank, add tap water, mix for 30 min, then extrude and granulate, then put it into a calcining furnace, calcine at 600 °C for 30 min, then cool to below 40 °C, and finally put it into a grinding machine to obtain the water purifying agent.

[0057] Take 1000 mL of the MBR-produced water from a landfill leachate (COD 1047 mg / L, colority > 500), add 3 g of the water purifying agent prepared in Example 1, stir for 20 min, then add 1 mL of a PAM solution with a mass concentration of 0.1%, continue to stir for 1 min, then let it settle for 20 min, take the supernatant for detection, COD 57 mg / L, transparent and colorless.

[0058] Take 1000 mL of the nanofiltration concentrate from a landfill leachate (COD 4660 mg / L, colority > 1000), add 10 g of the water purifying agent prepared in Example 1, stir for 20 min, then add 1 mL of a PAM solution with a mass concentration of 0.1%, continue to stir for 1 min, then let it settle for 20 min, take the supernatant for detection, COD 85 mg / L, transparent and colorless.

[0059] Take 1000 mL of the MBR-produced water from a waste incineration power plant leachate (COD 308 mg / L, colority > 300), add 2 g of the water purifying agent prepared in Example 1, stir for 20 min, then add 1 mL of a PAM solution with a mass concentration of 0.1%, continue to stir for 1 min, then let it settle for 20 min, take the supernatant for detection, COD 50.6 mg / L, transparent and colorless.

[0060] Take 1000 mL of the coking biochemical wastewater (COD 802 mg / L, colority > 500), add 6 g of the water purifying agent prepared in Example 1, stir and react for 20 min, then add 1 mL of a PAM solution with a mass concentration of 0.1%, continue to stir for 1 min, then let it settle for 20 min, take the supernatant for detection, COD 69 mg / L, transparent and colorless.

[0061] Comparative Example 1 On the basis of Example 1, calcium magnesium silicate minerals are omitted, and other conditions remain unchanged to obtain a water purifying agent.

[0062] Take 1000 mL of the MBR-produced water from a landfill leachate (COD 1047 mg / L, colority > 500), add 3 g of the water purifying agent prepared in Comparative Example 1, stir for 20 min, then add 1 mL of a PAM solution with a mass concentration of 0.1%, continue to stir for 1 min, then let it settle for 20 min, take the supernatant for detection, COD 700 mg / L, colority 200.

[0063] Comparative Example 2 On the basis of Example 1, activated carbon is omitted, and other conditions remain unchanged to obtain a water purifying agent.

[0064] Take 1000 mL of the MBR-produced water from a landfill leachate (COD 1047 mg / L, colority > 500), add 3 g of the water purifying agent prepared in Comparative Example 2, stir for 20 min, then add 1 mL of a PAM solution with a mass concentration of 0.1%, continue to stir for 1 min, then let it settle for 20 min, take the supernatant for detection, COD is 600 mg / L, and colority is 150.

[0065] Comparative Example 3 On the basis of Example 1, omit the clay mineral, and keep other conditions unchanged to obtain the water purifying agent.

[0066] Take 1000 mL of the MBR-produced water from a landfill leachate (COD 1047 mg / L, colority > 500), add 3 g of the water purifying agent prepared in Comparative Example 3, stir for 20 min, then add 1 mL of a PAM solution with a mass concentration of 0.1%, continue to stir for 1 min, then let it settle for 20 min, take the supernatant for detection, COD is 400 mg / L, and colority is 100.

[0067] Comparative Example 4 On the basis of Example 1, omit the iron oxide, and keep other conditions unchanged to obtain the water purifying agent.

[0068] Take 1000 mL of the MBR-produced water from a landfill leachate (COD 1047 mg / L, colority > 500), add 3 g of the water purifying agent prepared in Comparative Example 4, stir for 20 min, then add 1 mL of a PAM solution with a mass concentration of 0.1%, continue to stir for 1 min, then let it settle for 20 min, take the supernatant for detection, COD is 480 mg / L, and colority is 180.

[0069] Comparing Example 1 with Comparative Examples 1 - 4, it can be seen that the calcium magnesium silicate mineral, activated carbon, clay mineral, and iron oxide of the present invention can synergistically improve the purification effect of the water purifying agent. Omitting any one of them will cause a significant reduction in the purification effect.

[0070] Comparative Example 5 NF + RO + Concentrate evaporation crystallization Take 1000 mL of the MBR-produced water from a landfill leachate (COD 1047 mg / L, colority > 500). After NF + RO treatment, 40 wt% of the NF and RO concentrates with COD exceeding 4000 mg / L are produced, and the water production rate is only 60 wt%. Moreover, the subsequent treatment and disposal cost of the concentrate evaporation crystallization exceeds 300 yuan / ton.

[0071] Example 2 The water purifying agent is composed of the following raw materials: calcium magnesium silicate mineral, activated carbon, clay mineral, iron oxide, and inorganic solvent; The mass ratio of the calcium magnesium silicate mineral, activated carbon, clay mineral, and iron oxide is 2:5:1:2; The clay mineral is kaolin; The particle size of the calcium magnesium silicate mineral is 1000 mesh; The chemical composition of the calcium magnesium silicate mineral by mass percentage is O 53.74%, C 25.74%, Si 9.33%, Ca 5.21%, Mg 4.49%, F 0.66%, Fe 0.2%, and Al 0.63%; The particle size of the activated carbon is 1200 mesh; The particle size of the clay mineral is 1200 mesh; The particle size of the iron oxide is 1200 mesh; The inorganic solvent is tap water; The mass ratio of the total mass of the calcium magnesium silicate mineral, activated carbon, clay mineral, and iron oxide to the mass of the inorganic solvent is 1:1; The particle size of the water purifying agent is 200 - 300 mesh; The preparation method of the water purifying agent comprises the following steps: Put the calcium magnesium silicate mineral, activated carbon, clay mineral, and iron oxide into a mixing tank, add tap water, mix for 60 min, then extrude and granulate, then put it into a calcining furnace, calcine at 700 °C for 35 min, then cool to below 40 °C, and finally put it into a grinding machine to obtain the water purifying agent.

[0072] Take 1000 mL of the MBR effluent from a landfill leachate (COD 1047 mg / L, chromaticity > 500), add 3 g of the water purifying agent prepared in Example 2, stir for 20 min, then add 1 mL of a PAM solution with a mass concentration of 0.1%, continue to stir for 1 min, then let it settle for 20 min, take the supernatant for detection, COD 72 mg / L, transparent and colorless.

[0073] Example 3 The water purifying agent is composed of the following raw materials: calcium magnesium silicate mineral, activated carbon, clay mineral, iron oxide, and inorganic solvent; The mass ratio of the calcium magnesium silicate mineral, activated carbon, clay mineral, and iron oxide is 2.5:4.5:1:2; The clay mineral is kaolin; The particle size of the calcium magnesium silicate mineral is 900 mesh; The chemical composition of the calcium magnesium silicate mineral by mass percentage is O 53.74%, C 25.74%, Si 9.33%, Ca 5.21%, Mg 4.49%, F 0.66%, Fe 0.2%, and Al 0.63%; The particle size of the activated carbon is 1100 mesh; The particle size of the clay mineral is 1000 mesh; The particle size of the iron oxide is 1100 mesh; The inorganic solvent is tap water; The ratio of the total mass of the calcium magnesium silicate mineral, activated carbon, clay mineral and iron oxide to the mass of the inorganic solvent is 1:1; The particle size of the water purifying agent is 200 - 300 mesh; The preparation method of the water purifying agent comprises the following steps: Put the calcium magnesium silicate mineral, activated carbon, clay mineral and iron oxide into a mixing tank, add tap water, mix for 40 min, then extrude and granulate, then put it into a calcining furnace, calcine at 750 °C for 40 min, then cool to below 40 °C, and finally put it into a grinding machine to obtain the water purifying agent.

[0074] Take 1000 mL of the MBR produced water from the landfill leachate (COD 1047 mg / L, chromaticity > 500), add 3 g of the water purifying agent prepared in Example 3, stir for 20 min, then add 1 mL of a PAM solution with a mass concentration of 0.1%, continue to stir for 1 min, then let it settle for 20 min, take the supernatant for detection, COD 88 mg / L, transparent and colorless.

[0075] It can be seen from the above examples and comparative examples that the water purifying agent provided by the present invention has excellent purification effect.

[0076] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A water purifying agent, characterized in that, It includes the following raw materials: calcium magnesium silicate minerals, activated carbon, clay minerals, iron oxide and inorganic solvents; The mass ratio of the calcium magnesium silicate minerals, activated carbon, clay minerals and iron oxide is (2~3):(4~5):(1~2):(1~2).

2. The water purifying agent according to claim 1, wherein The clay minerals include at least one of kaolin and bentonite.

3. The water purifying agent according to claim 1, characterized in that, The particle sizes of the clay minerals, activated carbon and iron oxide are independently 800~1200 mesh.

4. The water purifying agent according to claim 1, wherein The particle size of the calcium magnesium silicate minerals is 600~1000 mesh.

5. The water purifying agent according to claim 1, characterized in that, The mass ratio of the total mass of the calcium magnesium silicate minerals, activated carbon, clay minerals and iron oxide to the mass of the inorganic solvent is 1:(0.5~1).

6. The water purifying agent according to claim 1, characterized in that, The particle size of the water purifying agent is 200~300 mesh.

7. The preparation method of the water purifying agent according to any one of claims 1 to 6, characterized in that, It includes the following steps: Mix the calcium magnesium silicate minerals, activated carbon, clay minerals, iron oxide and inorganic solvents, and carry out granulation and calcination in sequence to obtain the water purifying agent.

8. The preparation method according to claim 7, characterized in that, The temperature of the calcination is 600~800 °C, and the time of the calcination is 20~40 min.

9. The method of using the water purifying agent according to any one of claims 1 to 6 or the water purifying agent prepared by the preparation method according to claim 7 or 8, characterized in that, It includes: Mix the water to be treated, the water purifying agent and the flocculant, and then let it settle.

10. The usage method according to claim 9, characterized in that, The volume ratio of the water to be treated to the mass of the water purifying agent is 1000 mL:(0.1~20) g.