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Composite hydrogel for water purification and preparation method and application method thereof

A technology of composite hydrogel and application method, which is applied in the field of composite hydrogel for water purification and its preparation, which can solve the problems of difficult removal of metal ions, difficulty of catalyst recovery, increase of industrial cost, etc., easy recovery and reduced follow-up treatment Steps, the effect of reducing the cost of industrial applications

Pending Publication Date: 2020-12-08
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the traditional (like) Fenton system, metal ions are directly added to make it react directly with sewage in a homogeneous system, which makes it difficult to recover the catalyst and remove the metal ions, and may produce very difficult to handle. "Iron slime", increasing industrial costs

Method used

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  • Composite hydrogel for water purification and preparation method and application method thereof
  • Composite hydrogel for water purification and preparation method and application method thereof
  • Composite hydrogel for water purification and preparation method and application method thereof

Examples

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Effect test

Embodiment 1

[0038] Example 1: A composite hydrogel for water purification, including a catalytic system and hydrogel raw materials to prepare a polymer hydrogel body with a bulk structure. The catalytic system includes a catalyst and a carrier supporting the catalyst. The catalyst is a Fenton reaction catalyst or a Fenton-like reaction catalyst.

[0039] The body of the hydrogel is acrylamide. In addition, the hydrogel body can be polyvinyl alcohol, polyacrylic acid, polyacrylamide, polyacrylate, polyoxyethylene, etc.

[0040] The catalyst is a metal ion catalyst with variable valence in the transition zone, such as a source of Fe such as FeOOH, Fe 3 o 4 , Fe 2 o 3 , FeSO 4 , FeCl 2 etc. Co sources such as CoCl 2 , CoSO 4 ,Co 3 o 4 , Co(OH) 2 Wait, Mn 2+ , Cu 2+ , Ni 2+ , Ce 4+ Change the valence of metal ions in the transition zone. One or a mixture of several of these. Among them, it is preferable to use iron source ion catalysts, cobalt source ion catalysts, and manga...

Embodiment 2

[0044] Embodiment 2: a kind of preparation method of composite hydrogel for water purification, comprises the following steps:

[0045] A, prepare the graphene dispersion liquid that concentration is 1 g / L by Hummer method.

[0046] B. Take 100ml graphene dispersion and add CoCl 2 ·6H 2 O, up to CoCl 2 ·6H 2 The concentration of O was 10 mmol / L, and the mixture was stirred at a constant temperature of 80°C for 200 minutes to disperse the metal ions uniformly and obtain a composite material.

[0047] The metal ion form can be a solution or a particle. The metal ion is preferably a variable valence metal ion in the transition zone, for example, Fe source ion: FeOOH, Fe 3 o 4 , Fe 2 o 3 , FeSO4 , FeCl 2 etc.; Co source ion: CoCl 2 , CoSO 4 ,Co 3 o 4 , Co(OH) 2 etc.; manganese source ion Mn 2+ : Cu 2+ , Ni 2+ , Ce 4+ Wait.

[0048] Metal ions can also be selected from the above-mentioned multiple ions, not limited to one.

[0049] C. Take monomer acrylamide, cr...

Embodiment 3

[0054] Embodiment 3: a kind of preparation method of composite hydrogel for water purification, comprises the following steps:

[0055] A, the concentration obtained by the Hummer method is 0.1 g / L graphene dispersion.

[0056] B. Take 0.1ml graphene dispersion and add CoCl 2 ·6H 2 O, up to CoCl 2 ·6H 2 The O concentration is 0.1 mmol / L, and the mixture is stirred at a constant temperature of 10° C. for 10 minutes to disperse the metal ions uniformly and obtain a composite material.

[0057] C. Take monomer acrylamide, crosslinking agent N, N-methylene bisacrylamide and initiator ammonium persulfate, the molar ratio of monomer, crosslinking agent and initiator is 0.1:0.1:0.1, and then compound with The materials were mixed, vacuumized for 0.5 hours, and then kept at a constant temperature for 1 hour to synthesize composite hydrogel particles for water purification.

[0058] All the other contents are the same as in Example 1.

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Abstract

Provided are a composite hydrogel for water purification as well as the preparation method and the application method thereof provided by the invention, a Fenton system or a Fenton-like system is combined with the hydrogel, so that the related properties of the hydrogel are greatly improved, the repeated utilization of a Fenton system catalyst is realized, and the problems of high cost and large dosage of the catalyst are solved; meanwhile, the hydrogel can be reactivated through adsorption, so that recovery and reutilization are realized, the cost is greatly reduced, and the problem of secondary pollution of catalyst ions and materials is solved.

Description

technical field [0001] The invention relates to the field of sewage treatment. [0002] Specifically, it relates to a composite hydrogel for water purification and its preparation method and application method. Background technique [0003] With the rapid development of industry, a lot of refractory organic wastewater has been produced that is very harmful to the environment and human health. Hydrogel is a kind of polymer network system formed by certain chemical cross-linking or physical cross-linking. It has high water retention rate and adjustable mechanical properties, and has great potential in the environmental field. Divided into natural hydrophilic polymers and synthetic hydrophilic polymers. Natural polymers have better biocompatibility, abundant sources, and low prices. They have been studied by many scholars, but their stability is poor and they are easy to decompose. Therefore, artificially synthesized hydrogels are required, and traditionally synthesized hydr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C08F220/56C08F222/38C08F2/44C08K9/12C08K3/16C08J3/075C08L33/26C02F101/30
CPCC02F1/725C08F220/56C08F2/44C08K9/12C08K3/16C08J3/075C08J2333/26C02F2101/30C02F2305/023C08F222/385
Inventor 刘文元邢明阳张金龙谭金林张维杨博李天悦鲍延刘昕玥
Owner EAST CHINA UNIV OF SCI & TECH
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