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Preparation and application of magnetic dual-network kation hydrogel-based composite adsorbing material

A cationic hydrogel and composite adsorption material technology, which is applied in the fields of adsorbing water/sewage treatment, water pollutants, alkali metal compounds, etc., can solve the problem of unreported inorganic anions in water, etc. The effect of electric charge, strong exclusive adsorption properties

Inactive Publication Date: 2018-09-21
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 dual-network 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 dual-network kation hydrogel-based composite adsorbing material

Examples

Experimental program
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Effect test

Embodiment example 1

[0036] 1. Weigh 5g of (3-acrylamidopropyl)trimethylammonium chloride (APTMACl) monomer, and add 0.5g of cross-linking agent N,N'-methylenebisacrylamide (MBA) into it. Weigh 0.5g of sodium alginate and add it to 10ml of water. After the cross-linking agent MBA and sodium alginate are completely dissolved, mix the two solutions and add 0.1ml accelerator N,N,N',N'-tetramethylethylenediamine (TEMED) and 0.5g magnetic γ-Fe 2 o 3 . After the above substances are mixed evenly, add 1.5mL saturated potassium persulfate (KPS) solution of the initiator, and stir and react in a 60°C water bath for 15min. After the gel was formed, the resulting magnetic hydrogel was transferred to a glass bottle and immersed in a calcium chloride solution for 2 days. Then soak in deionized water for 3 days, and 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 ...

Embodiment example 2

[0040] 1. Weigh 5g of (3-acrylamidopropyl)trimethylammonium chloride (APTMACl) monomer, and add 0.5g of cross-linking agent N,N'-methylenebisacrylamide (MBA) into it. Weigh 0.5g of sodium alginate and add it to 10ml of water. After the cross-linking agent MBA and sodium alginate are completely dissolved, mix the two solutions and add 0.1ml accelerator N,N,N',N'-tetramethylethylenediamine (TEMED) and 0.5g magnetic γ-Fe 2 o 3 . After the above substances are mixed evenly, add 1.5mL saturated potassium persulfate (KPS) solution of the initiator, and stir and react in a 60°C water bath for 15min. After the gel was formed, the resulting magnetic hydrogel was transferred to a glass bottle and immersed in a calcium chloride solution for 2 days. Then soak in deionized water for 3 days, and 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 ...

Embodiment example 3

[0044] 1. Weigh 5g of (3-acrylamidopropyl)trimethylammonium chloride (APTMACl) monomer, and add 0.5g of cross-linking agent N,N'-methylenebisacrylamide (MBA) into it. Weigh 0.5g of sodium alginate and add it to 10ml of water. After the cross-linking agent MBA and sodium alginate are completely dissolved, mix the two solutions and add 0.1ml accelerator N,N,N',N'-tetramethylethylenediamine (TEMED) and 0.5g magnetic γ-Fe 2 o 3 . After the above substances are mixed evenly, add 1.5mL saturated potassium persulfate (KPS) solution of the initiator, and stir and react in a 60°C water bath for 15min. After the gel was formed, the resulting magnetic hydrogel was transferred to a glass bottle and immersed in a calcium chloride solution for 2 days. Then soak in deionized water for 3 days, and 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 ...

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Abstract

The invention relates to a preparation method and application of a magnetic dual-network kation hydrogel-based composite adsorbing material aiming at anion pollutants in water. The adsorbing materialincludes kation hydrogel, calcium alginate, magnetic matter and multi-element hydrated oxidation state active metal components. The preparation process of the adsorbing material involves the free radical polymerization effect between trimethyl ammonium chloride and methylene bisacrylamide, the electrostatic effect of Ca2+ and alginic acid, dispersed doping of the magnetic matter and in-situ loading of the active metal components, and the adsorbing material has high surface positive charge and exclusive adsorption potential, and can efficiently and rapidly adsorb inorganic pollutants such as PO43-, NO3-, F- and AsO43- and organic pollutants such as anion dye away. The adsorbing material is good in chemical stability, good in mechanical performance, wide in pH value range, high in ion interference resistance, low in ion dissolving-out amount and free of secondary pollution, and has good application potential, and magnetic field separation and repeated regeneration are easy.

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 double network cationic hydrogel-based composite adsorption material. Background technique: [0002] With the rapid development of social economy, the types and quantities of anionic pollutants entering water bodies are increasing day by day. cause serious harm. Anionic pollutants mainly include phosphate (PO 4 3- ), nitrate (NO 3 - ), fluoride (F - ), arsenate (AsO 3 - ) and other inorganic anion pollutants and organic anion pollutants. High concentration of PO 4 3- Direct discharge into receiving water bodies with limited self-purification capacity or has been polluted will bring the risk of eutrophication, reduce dissolved oxygen in water, and reduce aquatic organisms; excessive NO 3 - It will migrate and transform, bringing health problems such as: cancer, cyanosis, mental d...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/30C02F101/14C02F101/16C02F101/10
CPCB01J20/046B01J20/06B01J20/24B01J20/261B01J20/28009B01J20/28047B01J2220/46B01J2220/4806B01J2220/4812C02F1/281C02F1/285C02F1/286C02F2101/105C02F2101/14C02F2101/163C02F2101/308
Inventor 王毅力周小惠董硕勋
Owner BEIJING FORESTRY UNIVERSITY
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