A kind of nano iron oxyhydroxide gel composite material and its preparation method and application

A technology of iron oxyhydroxide and composite materials, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve problems such as easy agglomeration and difficulty in recycling, so as to reduce environmental pollution and save costs , the effect of strong permeability

Active Publication Date: 2022-03-15
SOUTH CHINA AGRI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

By combining hydrogels and nanomaterials, it solves the problem of easy agglomeration and difficult recovery of heavy metal adsorption nanomaterials in the prior art, and provides new composite materials for heavy metal repair

Method used

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  • A kind of nano iron oxyhydroxide gel composite material and its preparation method and application
  • A kind of nano iron oxyhydroxide gel composite material and its preparation method and application
  • A kind of nano iron oxyhydroxide gel composite material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) Weigh 3.00g of acrylamide (AM), 5.00g of alkaline pulping and papermaking black liquor (from Guangzhou Paper Group Co., Ltd., containing alkali lignin LS), 1.00g of maleic anhydride (MAH), Combined agent N,N-methylenebisacrylamide (NMBA) 0.01g, add 20mL deionized water, stir mechanically until all raw materials are completely dissolved, mix evenly, and then mix 0.1mol·L - 1 FeSO 4 .7H 2 O solution 10mL.

[0052] (2) Add 0.05 g of initiator potassium persulfate (KPS) to the mixture after uniform stirring for 1 h in step (1), stir evenly, after fully dissolving, let it stand until a gel is formed, wash thoroughly, and then freeze-dry for 6 h ;

[0053] (3) Soak the xerogel obtained in step (2) in 1mol L -1 NaHCO 3 solution for 2 hours, and then dried in the air (or dried with oxygen) to obtain the nano-iron oxyhydroxide gel composite material.

[0054] The appearance of the nanometer iron oxyhydroxide gel composite material is as follows figure 1 shown.

[00...

Embodiment 2

[0058] (1) Weigh 4.00g of acrylamide (AM), 5.00g of alkaline pulping and papermaking black liquor (from Guangzhou Paper Group Co., Ltd.), 1.00g of maleic anhydride (MAH), crosslinking agent N,N- Add 0.01g of methylenebisacrylamide (NMBA), add 20mL of deionized water, stir mechanically until all raw materials are completely dissolved, mix evenly, and then mix 0.1mol·L -1 FeSO 4 .7H 2 O solution 10mL.

[0059] (2) Add 0.05 g of initiator potassium persulfate (KPS) to the mixture after uniform stirring for 2 hours in step (1), stir evenly, after fully dissolving, let it stand until a gel is formed, wash thoroughly, and then freeze-dry for 12 hours ;

[0060] (3) Soak the xerogel obtained in step (2) in 1mol L -1 NaHCO 3 The solution is dried for 4 hours, and then dried in the air (or dried with oxygen) to obtain the nano-iron oxyhydroxide gel composite material.

Embodiment 3

[0062] (1) Weigh 5.00g of acrylamide (AM), 5.00g of alkaline pulping and papermaking black liquor (from Guangzhou Paper Group Co., Ltd.), 1.00g of maleic anhydride (MAH), crosslinking agent N,N- Add 0.01g of methylenebisacrylamide (NMBA), add 20mL of deionized water, stir mechanically until all raw materials are completely dissolved, mix evenly, and then mix 0.1mol·L -1 FeSO 4 .7H 2 O solution 10mL.

[0063] (2) Add 0.05 g of initiator potassium persulfate (KPS) to the mixture after uniform stirring for 1 h in step (1), stir evenly, after fully dissolving, let it stand until a gel is formed, wash thoroughly, and then freeze-dry for 18 h ;

[0064] (3) Soak the xerogel obtained in step (2) in 1mol L -1 NaHCO 3 solution for 3 hours, and then dried in the air (or dried with oxygen) to obtain the nano-iron oxyhydroxide gel composite material.

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Abstract

The invention provides a nano-iron oxyhydroxide gel composite material and a preparation method and application thereof. The present invention uses alkaline pulping and papermaking black liquor and acrylamide, maleic anhydride, crosslinking agent and initiator to prepare a gel composite material with crosslinked interpenetrating network macromolecules and high permeability, and passes the The method of in-situ synthesis produces nano-iron oxyhydroxide, and the preparation method is simple and feasible, and innovatively realizes the recycling and utilization of alkaline pulping and papermaking black liquor, saves costs and reduces environmental pollution. The nano-iron oxyhydroxide is evenly distributed in the composite material obtained by the present invention, and the interpenetrating network structure of the composite material effectively prevents the aggregation and shedding of the nano-iron oxyhydroxide, and provides a suitable place for the dispersion and fixation of the nano-iron oxyhydroxide , the adsorption and removal effect on heavy metals is obvious, and it has broad application prospects in the field of heavy metal removal.

Description

technical field [0001] The invention belongs to the technical field of nanocomposite materials, in particular to a nanometer iron oxyhydroxide gel composite material and its preparation method and application. Background technique [0002] Pb exists widely in nature, but Pb pollution in soil and water environment mainly comes from various industrial activities and transportation of human beings. Pb and its compounds have become one of the 68 priority pollutants in my country because of their non-degradable toxic pollution characteristics. In addition, Pb can endanger human health through various channels such as food chains, rivers, and groundwater. [0003] At present, the methods of controlling Pb in the environment that are widely researched and applied mainly include: one is to use biochemical methods such as plants and microorganisms. Through the absorption, accumulation and flocculation of heavy metal Pb by plants or microorganisms, the concentration of heavy metal Pb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F289/00C08F220/56C08F222/06C08F222/38C08K3/22B01J20/26B01J20/28C02F1/28B01J20/30C02F101/20
CPCC08F289/00C08K3/22B01J20/264C02F1/286B01J20/24C02F1/285B01J20/28047C02F2101/20B01J2220/4837C08K2201/011C08K2003/2265C08F220/56C08F222/06C08F222/385
Inventor 李永涛姚波刘永林张玉龙柯美国林学明徐会娟
Owner SOUTH CHINA AGRI UNIV
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