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CN-122006659-A - Polymeric ferric sulfate-based water treatment composition, preparation method and application

CN122006659ACN 122006659 ACN122006659 ACN 122006659ACN-122006659-A

Abstract

The invention belongs to the technical field of wastewater treatment, and particularly relates to a polymeric ferric sulfate-based water treatment composition, a preparation method and application. The polymeric ferric sulfate-based water treatment composition comprises, by weight, 40-50 parts of polymeric ferric sulfate, 35-45 parts of bentonite, 5-15 parts of cyclodextrin modified silica nanoparticles and 10-20 parts of corn straw powder. The specific surface area of the polymeric ferric sulfate-based water treatment composition is 22-40m 2 /g, the average pore diameter is 1-5nm, and the particle size is 3-5mm. The polymeric ferric sulfate-based water treatment composition developed by the invention not only can effectively remove antimony in water, but also can realize water quality purification under the conditions of no generation of a large amount of sediment and low chromaticity.

Inventors

  • ZHANG WEN
  • ZHANG XINBING
  • HAN ZHANTAO
  • ZHAO WENDE

Assignees

  • 生态环境部土壤与农业农村生态环境监管技术中心

Dates

Publication Date
20260512
Application Date
20260323

Claims (10)

  1. 1. The polymeric ferric sulfate-based water treatment composition is characterized by comprising, by weight, 40-50 parts of polymeric ferric sulfate, 35-45 parts of bentonite, 5-15 parts of cyclodextrin modified silica nanoparticles and 10-20 parts of corn straw powder.
  2. 2. The polymeric ferric sulfate based water treatment composition according to claim 1, wherein the polymeric ferric sulfate based water treatment composition has a specific surface area of 22-40m 2 /g, an average pore size of 1-5nm, and a particle size of 3-5mm.
  3. 3. A method for preparing the polymeric ferric sulfate-based water treatment composition according to any one of claims 1 to 2, comprising the steps of: (1) Mixing polymeric ferric sulfate, bentonite, cyclodextrin modified silicon dioxide nano particles and corn stalk powder to obtain a mixture; (2) Sintering the mixture to obtain a sintered product; (3) And (3) treating the sintered product to obtain the porous polymeric ferric sulfate-based water treatment composition.
  4. 4. The method of claim 3, wherein the mixture of step (1) is added with water to prepare a blank, and the blank is formed into pellets of 3-5mm to obtain the mixture.
  5. 5. The method of claim 3, wherein the specific sintering operation in the step (2) comprises heating to 140-160 ℃ and drying, and then heating to 300-500 ℃ and sintering.
  6. 6. The method according to claim 5, wherein the heating rate in the step (2) is 4.5-6 ℃.
  7. 7. The method of claim 6, wherein the drying time in the step (2) is 0.5 to 1.5 hours, and the sintering time is 1 to 3 hours.
  8. 8. The method of claim 3, wherein the step (3) comprises naturally cooling the sintered product to room temperature.
  9. 9. Use of the polymeric ferric sulfate-based water treatment composition of any one of claims 1-2 or prepared by the preparation method of any one of claims 3-8 in the treatment of wastewater contaminated with heavy metals.
  10. 10. The use according to claim 9, wherein the heavy metal is antimony and the heavy metal removal rate is 99% or more.

Description

Polymeric ferric sulfate-based water treatment composition, preparation method and application Technical Field The invention belongs to the technical field of wastewater treatment, and particularly relates to a polymeric ferric sulfate-based water treatment composition, a preparation method and application. Background Heavy metal polluted wastewater is generated in metallurgy, mining, electroplating, chemical industry and the like. After the heavy metals are dissolved in the water body, the heavy metals can not be naturally degraded, and can be remained in the water for a long time, so that toxic effects can be generated on aquatic organisms, further the food chain is affected, and finally the health of human beings is endangered. These heavy metals in water not only enter the human body through direct drinking of the polluted water source, but also can be indirectly transmitted through aquatic products, crops and the like. Therefore, ensuring that the water source is not polluted by heavy metals has become an urgent task for ensuring ecological safety and human health. The development of novel high-efficiency water treatment materials has become an important research direction in the field of environmental protection. The conventional water treatment method, such as a neutralization precipitation method, can effectively remove heavy metals in water by adjusting the pH to generate hydroxide precipitates, but often causes secondary pollution problems such as color change, precipitate generation and the like. The ceramsite material is prepared by taking clay, shale, fly ash and other aluminous materials as raw materials and sintering at high temperature. Although the material has certain adsorption capacity, secondary pollution such as sediment can be reduced. But has the defects of single pore structure, limited specific surface area, lower adsorption efficiency of heavy metal ions and organic pollutants due to the fact that the traditional ceramsite mainly comprises closed pores, insufficient mechanical strength, high raw material cost, increasingly scarce high-quality clay resources, ecological environment damage in the exploitation process and incapacity of meeting the sustainable development concept, and the fact that cracks are easily generated in the sintering process to cause the reduction of cylinder pressure and influence the long-term use stability. The PFS is generally used as a flocculating agent, and only the chemical characteristics of the PFS are utilized, and the pyrolysis behavior (such as SO 3、H2 O release) of the PFS is not combined to regulate and control the pore structure of the ceramsite. The Chinese patent application CN201610544744.9 discloses a preparation method of an ammonia and phosphorus removal compound medicament, which comprises the following steps of 1) dissolving polymeric ferric sulfate in water and stirring to obtain a polymeric ferric sulfate aqueous solution, wherein the mass concentration of the polymeric ferric sulfate aqueous solution is 40% -50%, 2) sequentially adding zeolite powder and magnesium chloride into the polymeric ferric sulfate aqueous solution and mixing to obtain a mixed solution with stable components, 3) spray-drying the mixed solution and grinding the mixed solution into nano-scale, wherein the weight percentage of each raw material in the steps is 60% -70% of polymeric ferric sulfate, 25% -35% of zeolite powder and 4% -6% of magnesium chloride. The product obtained by the preparation method has stable composite performance, has the effect of the composite coagulant, and also has the effects of adsorption decolorization and denitrification and dephosphorization. Another chinese patent application No. cn201811583600.X discloses an industrial wastewater treatment agent and a preparation method thereof. The industrial wastewater treatment agent comprises the following raw materials of polymeric ferric sulfate, polymeric aluminum chloride, composite particles, polyethyleneimine or modified matters thereof and polyacrylamide. The industrial wastewater treatment agent has reasonable compatibility of components, overcomes the defects of high input cost, limited degradable substances, poor degradation effect and easy secondary pollution of the traditional industrial wastewater treatment agent, can effectively treat various harmful components in industrial wastewater, has stable chemical property, powerfully adsorbs oils and polymers which are difficult to degrade in water, has obvious wastewater treatment effect, low use cost and strong universality, and is suitable for treating industrial wastewater such as slime water, oily wastewater, printing and dyeing wastewater, papermaking wastewater, chemical wastewater and domestic wastewater. The prior art has made a certain research on materials for industrial wastewater treatment, and has achieved a certain effect, but most of the materials are nitrogen, phosphorus, organic matters and the like in the purified