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Preparation method and application of quinonoid compound modified nylon membrane biological carrier

A technology of biological carrier and nylon membrane, which is applied in the fields of chemical engineering, environmental engineering, and material engineering. It can solve the problems of microbial system poisoning, poor mechanical strength, and easy loss, so as to reduce secondary pollution, have good biocompatibility, Effect of increasing quinone group content

Inactive Publication Date: 2015-05-20
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a nylon membrane with excellent pore structure performance, stable chemical and mechanical properties, no biotoxicity, self-contained amino active groups, stable bond forming performance, and large surface area, which is suitable for quinone compounds. Immobilization, the use of quinone-based compounds to modify the surface of nylon membranes by chemical grafting, so as to apply the technical scheme of accelerating the degradation of azo dyes and biological denitrification in water pollution control, solves the continuous dosing cost of water-soluble redox mediators High, easy to cause secondary pollution and the problems of easy loss, poor mechanical strength, unstable bond-forming performance and toxic effects on microbial systems in the reported immobilization methods of quinone compounds

Method used

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  • Preparation method and application of quinonoid compound modified nylon membrane biological carrier
  • Preparation method and application of quinonoid compound modified nylon membrane biological carrier
  • Preparation method and application of quinonoid compound modified nylon membrane biological carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Put 20 pieces of nylon membranes with a radius of 1 cm into 3 mol / L hydrochloric acid solution for hydrolysis. After hydrolysis at 35°C for 12 hours, wash with distilled water and dry for later use. Place a 250ml four-neck flask on a magnetic stirrer, add 5 pieces of hydrolyzed nylon membranes, 50ml of 2mol / L NaOH solution to the flask; dissolve 0.1g of anthraquinone-2-sulfonyl chloride into 30ml of dimethyl In the base sulfoxide, drop it into the flask with a constant pressure dropping funnel at 30°C, and continue the reaction under stirring for 6 hours to obtain a nylon membrane grafted with quinone groups, in which the quinone group content is 0.4 mmol / g. Take out the nylon membrane grafted with quinone groups, wash it with dimethyl sulfoxide, wash off the anthraquinone-2-sulfonyl chloride attached to the surface, wash it with distilled water, and dry it to obtain the nylon membrane modified by quinone compounds. Nylon membrane with quinone compounds.

Embodiment 2

[0029] Put 20 pieces of nylon membranes with a radius of 1 cm into 2mol / L hydrochloric acid solution for hydrolysis. After hydrolysis at 40°C for 10 hours, wash with distilled water and dry for later use. Place a 250ml four-neck flask on a magnetic stirrer, add 5 pieces of hydrolyzed nylon membranes, 50ml of 1mol / L NaOH solution to the flask; dissolve 0.1g of anthraquinone-2-sulfonyl chloride into 30ml of dimethyl In the base sulfoxide, drop it into the flask with a constant pressure dropping funnel at 35°C, and continue to react for 5 hours under stirring conditions to obtain a nylon membrane grafted with quinone groups, in which the content of quinones is 0.3 mmol / g. The nylon membrane grafted with quinone groups is taken out, washed with dimethyl sulfoxide to remove anthraquinone-2-sulfonyl chloride attached to the surface, washed with distilled water, and dried to obtain a nylon membrane modified with quinone compounds.

Embodiment 3

[0031]Put 20 pieces of nylon membranes with a radius of 1 cm into 4 mol / L hydrochloric acid solution for hydrolysis. After hydrolysis at 30°C for 15 hours, wash with distilled water and dry for later use. Place a 250ml four-neck flask on a magnetic stirrer, add 5 hydrolyzed nylon membranes and 50ml of 3mol / L NaOH solution to the flask; dissolve 0.1g of anthraquinone-2-sulfonyl chloride into 30ml of dimethyl In the base sulfoxide, drop it into the flask with a constant pressure dropping funnel at 30°C, and continue to react for 4 hours under stirring conditions to obtain a nylon membrane grafted with quinone groups, in which the content of quinones is 0.2 mmol / g. The nylon membrane grafted with quinone groups is taken out, washed with dimethyl sulfoxide to remove anthraquinone-2-sulfonyl chloride attached to the surface, washed with distilled water, and dried to obtain a nylon membrane modified with quinone compounds.

[0032] The application of the nylon membrane biocarrier mo...

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Abstract

The invention discloses a quinonoid compound modified nylon membrane biological carrier and a preparation method and application thereof and belongs to the field of environmental engineering, chemical engineering and materials engineering. By adoption of the technical scheme, a quinonoid compound is fixed to a nylon membrane with excellent pore structure properties and amino active groups through a chemical grafting method, and a quinonoid compound modified nylon membrane biological carrier which is large in quinonoid grafting amount, high in water scouring resistance, stable in mechanical performance, free in biological toxic properties and high in catalytic efficiency is prepared and is applied to biodegradation and bio-denitrification of azo dyes. The quinonoid compound modified nylon membrane biological carrier has the beneficial effects that the preparation method is simple, and the reaction time and cost are saved; the carrier bonding is stable, and the catalytic efficiency is high. In addition, for a microbial denitrification process, the nylon membrane has high toughness and high biocompatibility, is easy to hang, has the characteristic of forming a stable microbial community and is suitable for industrial production and popularization and application.

Description

technical field [0001] The invention belongs to the fields of environmental engineering, chemical engineering and material engineering, and relates to a method for immobilizing quinone compounds by chemical means on a nylon membrane carrier, a quinone-based modified nylon membrane and its application, in particular to its role in accelerating the degradation of azo dyes and bioreaction application in nitrification. Background technique [0002] In today's society, with the development of economy and the progress of industry, the problem of water pollution has gradually attracted people's attention. A large amount of nitrogen-containing sewage enters the water body, causing serious harm to the ecological environment and human health. Traditional nitrogen-containing wastewater treatment methods are mainly physical, chemical, and biological. Among them, biological denitrification technology is widely used because of its simple process, low price, high removal rate, and environ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28C02F3/34
Inventor 郭建博许晴牛春梅廉静郭延凯侯正浩李绍英
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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