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

A biological carrier and nylon membrane technology, which is applied in chemical engineering, material engineering, and environmental engineering, can solve the problems of microbial system toxicity, secondary pollution, poor mechanical strength, etc., achieve good biocompatibility, and reduce secondary pollution , the effect of increasing the content of quinone groups

Inactive Publication Date: 2014-07-23
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 nylon membranes with a radius of 1 cm into a 3 mol / L hydrochloric acid solution for hydrolysis. After hydrolyzing at 35°C for 12 hours, they were washed with distilled water and dried for later use. Place a 250ml four-necked flask on a magnetic stirrer, add 5 pieces of hydrolyzed nylon membrane, 50ml of 2mol / L NaOH solution to the flask in turn; dissolve 0.1g of anthraquinone-2-sulfonyl chloride into 30ml of dimethyl The sulfoxide was added dropwise to the flask with a constant pressure dropping funnel at 30°C, and the reaction was continued for 6 hours under stirring to obtain a nylon membrane grafted with quinone groups, in which the content of quinone groups was 0.4 mmol / g. Take out the nylon membrane grafted with quinone groups, wash with dimethyl sulfoxide, wash off the attached surface of anthraquinone-2-sulfonyl chloride, then wash with distilled water, and dry to obtain a fixed nylon membrane modified by quinone compounds Nylon membrane with quinone compou...

Embodiment 2

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

Embodiment 3

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

[0032] The nylon membrane biological...

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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 Applications(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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