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Preparation and application of magnetic cationic hydrogel-based composite adsorption material

A cationic hydrogel and composite adsorption material technology, which is applied in the direction of adsorption of water/sewage treatment, filtration and separation, water pollutants, etc., can solve the problems of inorganic anions in water that have not been reported, and achieve small secondary pollution and simple recycling and regeneration , low-cost effect

Inactive Publication Date: 2017-06-13
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the invention of hydrogel adsorbent loaded with cheap active metals has not been involved, and the application of inventions for the removal of inorganic anions in water has not been reported.

Method used

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  • Preparation and application of magnetic cationic hydrogel-based composite adsorption material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0042] 1. Weigh 5g of (3-acrylamidopropyl) trimethylammonium chloride (APTMACl) monomer, add 0.5g of cross-linking agent N, N'-methylenebisacrylamide (MBA) to it, and then Add 0.8mL pure water. After the cross-linking agent MBA is completely dissolved, add 0.1ml accelerator N,N,N',N'-tetramethylethylenediamine (TEMED) and 0.5g magnetic γ-Fe 2 o 3 When the above substances are mixed evenly, add 1.5mL saturated potassium persulfate (KPS) solution of initiator. The reaction was stirred for 15 min in a water bath at 60 °C. After the gel was formed, the magnetic hydrogel was transferred to a glass bottle and immersed in pure water for 5 days. Change the water every 8 hours to wash away unreacted substances such as monomers, cross-linking agents, initiators and accelerators. The magnetic hydrogel is then freeze-dried and ground into granules for future use.

[0043] 2. Immerse the cationic hydrogel particles in the mixed solution of saturated lanthanum nitrate and zirconium sulf...

Embodiment example 2

[0046] 1. Weigh 5g of (3-acrylamidopropyl) trimethylammonium chloride (APTMACl) monomer, add 0.5g of cross-linking agent N, N'-methylenebisacrylamide (MBA) to it, and then Add 0.8mL pure water. After the cross-linking agent MBA is completely dissolved, add 0.1ml accelerator N,N,N',N'-tetramethylethylenediamine (TEMED) and 0.5g magnetic γ-Fe 2 o 3 When the above substances are mixed evenly, add 1.5mL saturated potassium persulfate (KPS) solution of initiator. The reaction was stirred for 15 min in a water bath at 60 °C. After the gel was formed, the magnetic hydrogel was transferred to a glass bottle and immersed in pure water for 5 days. Change the water every 8 hours to wash away unreacted substances such as monomers, cross-linking agents, initiators and accelerators. The magnetic hydrogel is then freeze-dried and ground into granules for future use.

[0047] 2. Immerse the cationic hydrogel particles in the saturated lanthanum nitrate and zirconium sulfate solution, the ...

Embodiment example 3

[0050] 1. Weigh 5g of (3-acrylamidopropyl) trimethylammonium chloride (APTMACl) monomer, add 0.5g of cross-linking agent N, N'-methylenebisacrylamide (MBA) to it, and then Add 0.8mL pure water. After the cross-linking agent MBA is completely dissolved, add 0.1ml accelerator N,N,N',N'-tetramethylethylenediamine (TEMED) and 0.5g magnetic γ-Fe 2 o 3 When the above substances are mixed evenly, add 1.5mL saturated potassium persulfate (KPS) solution of initiator. The reaction was stirred for 15 min in a water bath at 60 °C. After the gel was formed, the magnetic hydrogel was transferred to a glass bottle and immersed in pure water for 5 days. Change the water every 8 hours to wash away unreacted substances such as monomers, cross-linking agents, initiators and accelerators. The magnetic hydrogel is then freeze-dried and ground into granules for future use.

[0051] 2. Immerse the hydrogel particles in a mixed solution of lanthanum nitrate-ethanol (every 100ml contains 20g of la...

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Abstract

The invention relates to a preparation method and application of a magnetic cationic hydrogel-based composite adsorption material removing inorganic anionic pollutants in water. The magnetic cationic hydrogel-based composite adsorption material contains cationic hydrogel, magnetic substances and different forms of active metals. The preparation method of the magnetic cationic hydrogel-based composite adsorption material comprises the following steps: carrying out free radical copolymerizationontrimethyl ammonium chloride and methylene bisacrylamide, adding magnetic substances for reacting, and then carrying out in-situ loading on the different forms of the active metals, and the synthesized composite adsorption material has high surface positive charges and an exclusive adsorption site and can efficiently and quickly adsorb and remove F<->, PO4<3->, NO<3->, AsO4<3-> and SbO4<3-> in water. The prepared composite adsorption material has good chemical stability, wider pH value application range, strong resistance to ion interference, easiness in magnetic field separation and multiple regeneration times, low ion dissolving-out quantity and no secondary pollution and has good application potential.

Description

technical field [0001] The invention relates to the fields of composite materials and environmental science and technology, in particular to the preparation and application of a magnetic cationic hydrogel-based composite adsorption material. Background technique [0002] With the rapid development of social economy, the types and quantities of inorganic anion pollutants entering water bodies are increasing, mainly including: phosphate (PO 4 3- ), Antimonate (SbO 3 - ), arsenate (AsO 3 - ), nitrate (NO 3 - ), fluoride (F - ), etc. are mostly derived from industrial / agricultural production, such as: mining, metallurgy (aluminum), pharmaceuticals, leather / rubber / glass / chemical fiber processing, printing and dyeing, pesticides / fertilizers, etc. Some mainly come from domestic wastewater, such as: detergents, wetting agents, foaming agents, soap / medicine / personal care products, etc. These anionic pollutants have potential or significant toxicity to human skin (chromium), ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/34C02F1/28C02F101/10C02F101/14C02F101/22
CPCB01J20/223B01J20/28009B01J20/28047B01J20/3425B01J20/3475C02F1/285C02F2101/10C02F2101/103C02F2101/105C02F2101/14C02F2101/22
Inventor 王毅力董硕勋赵怡雯
Owner BEIJING FORESTRY UNIVERSITY
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