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Preparation method of hydrogel with adsorption and catalysis functions

An adsorption catalysis, hydrogel technology, applied in chemical instruments and methods, adsorption water/sewage treatment, other chemical processes, etc., can solve the problems of low desorption rate, inability to achieve treatment effect, etc., achieve simple preparation method, equipment The effect of less demanding, efficient degradation ability

Active Publication Date: 2014-01-22
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, after the hydrogel adsorbs the dye, the desorption rate is low, so that the dye is only adsorbed from the printing and dyeing wastewater to the hydrogel and converted into solid waste, which cannot achieve the ideal treatment effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 0.1 g N,N' -Methylenebisacrylamide was placed in a four-necked flask, 50 ml of tap water was added, and stirred for 30 minutes; 7.2 grams of acrylic acid was added to the above-mentioned flask, and 5 ml of 6 mol / L sodium hydroxide solution was added dropwise under stirring; stirred for 30 minutes Finally, add 0.1 g of ammonium cerium nitrate, raise the temperature to 60 ° C, and keep it for 4 hours; cut the prepared hydrogel into blocks with a length, width and height between 0.2 and 3 cm, and place it in 200 ml of 1 mmol / L gold chloride Soak in the acid solution for 4 hours; the hydrogel is separated and then placed in 300 ml of 10 mmol / L tannic acid solution for reduction for 1 hour; the hydrogel is filtered out and dried in an oven at 70°C to constant weight. The product can completely degrade 20 mg / L methylene blue within 15 minutes.

Embodiment 2

[0030] Put 0.5 g of aluminum sulfate in a four-necked flask, add 50 ml of tap water, and stir for 30 minutes; add 10 g of acrylic acid into the above-mentioned flask, and add 10 ml of 6 mol / L sodium hydroxide solution dropwise under stirring; stir for 30 minutes and then add 0.1 g of ammonium persulfate, heated to 70°C, and kept for 4 hours; cut the prepared hydrogel into blocks with length, width and height between 0.2 and 3 cm, and placed in 200 ml of 5 mmol / L silver nitrate solution Soak for 10 hours; after separation, the hydrogel was placed in 300 ml of 2 mmol / L ascorbic acid solution for reduction for 2 hours; the hydrogel was filtered out and dried in an oven at 80°C until constant weight. The product can completely degrade 20 mg / L Congo red within 15 minutes.

Embodiment 3

[0032] 0.5 g chitosan, 0.3 g N,N' -Methylenebisacrylamide was placed in a four-necked flask, added 50 ml of tap water, and stirred for 30 minutes; 4 grams of acrylic acid was added to the above flask, and 2 ml of 6 mol / L sodium hydroxide solution was added dropwise under stirring; stirred for 30 minutes Finally, add 0.1 gram of hydrogen peroxide and 0.2 gram of ascorbic acid, and keep at 20 degrees for 4 hours; directly place the prepared granular hydrogel in 200 milliliters of 2 mmol / L chloroplatinic acid solution and soak for 24 hours; It was reduced in 300 ml of 5 mmol / L sodium borohydride solution for 4 hours; the hydrogel was filtered off and dried in an oven at 60°C until constant weight. The product can completely degrade 20 mg / L malachite green within 15 minutes.

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PUM

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Abstract

The invention discloses a preparation method of a hydrogel with adsorption and catalysis functions. The preparation method comprises the following steps of: preparing the hydrogel, and loading at least one noble metal to a hydrogel carrier; drying the obtained loaded type hydrogel. The preparation process of a loaded type hydrogel material is simple, moderate in condition and suitable for industrial production; an obtained product can be used for effectively degrading the organic dyes which are contained in a water body and include anionic and cationic dyes and still has better catalytic property after being recycled for multiple times.

Description

technical field [0001] The invention relates to the field of environmental protection water treatment, in particular, the invention relates to a method for preparing a hydrogel capable of degrading organic dyes and having dual functions of adsorption and catalysis. Background technique [0002] Environmental pollution control and treatment is a major issue that human beings face and need to be solved urgently. my country is the largest country in the textile industry, and printing and dyeing is the core process of the textile industry. The wastewater discharged by printing and dyeing accounts for more than 80% of the textile industry's wastewater discharge, and accounts for about 35% of the entire industrial wastewater discharge. The printing and dyeing industry is a major player in the discharge of industrial wastewater, and the resulting ecological damage and economic losses are immeasurable. [0003] Printing and dyeing wastewater has high chroma, strong toxicity, large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/02C08L1/26C08L5/08C08L5/00C08L5/04C08L3/02C08K3/08C08K3/34B01J20/26B01J20/30C02F1/28C02F1/30
Inventor 郑易安王爱勤
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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