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Method for grafting redox mediator on surface of inorganic filler and application

An inorganic filler and mediator technology, which is applied in the field of redox mediator grafting on the surface of inorganic fillers, can solve the problems of porous structure bacterial group blockage, low final yield, long reaction steps, etc., and achieve increased biodegradation rate, The effect of simple reaction process and few reaction steps

Active Publication Date: 2019-07-23
XIAMEN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are following problems in this method: (1) reaction step is long, time-consuming is long, final yield is low, and cost is high; (2) use the anthraquinone compound that contains sulfonyl chloride group to be easy to produce hydrogen chloride gas when contacting water vapor, dangerous Large, so the production environment needs to be strictly controlled during use, resulting in inconvenient operation and increased cost; (3) Although the porous inorganic filler has a large specific surface area, the internal porous structure is easily blocked by bacteria in practical applications, and cannot play a role. Only surface quinone-based compounds can function

Method used

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  • Method for grafting redox mediator on surface of inorganic filler and application
  • Method for grafting redox mediator on surface of inorganic filler and application
  • Method for grafting redox mediator on surface of inorganic filler and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]Stir 100 parts of methanol, 12 parts of 3-mercaptopropyltrimethoxysilane and 1 part of dilute hydrochloric acid with a mass concentration of 0.1 wt% at room temperature for 0.5 hours, add them to 50 parts of 5 μm talcum powder, raise the temperature to 50 ° C, and react 2 hours, cooling down, filtering, filtering out solids, washing with absolute ethanol three times, and drying to obtain mercaptopropyl modified talc powder 1.

[0038] Add 100 parts of mercaptopropyl modified talc powder 1, 10 parts of 1-allyloxy-4-hydroxyanthraquinone-9,10-dione, 300 parts of tetrahydrofuran and 3 parts of benzoin ethyl ether into the container, and stir at room temperature Irradiate for 5 minutes under ultraviolet light with a dominant wavelength of 365 nm and a light intensity of 100 W / cm, filter, wash the filtered solid with absolute ethanol three times, and dry to obtain talc powder 1 grafted with a redox mediator.

[0039] FT-IR analysis, the product is at 1669cm -1 A strong and sh...

Embodiment 2

[0041] Stir 100 parts of methanol, 20 parts of 3-mercaptopropyltrimethoxysilane and 1 part of dilute hydrochloric acid with a mass concentration of 0.1 wt% at room temperature for 0.5 hours, add them to 50 parts of 20 μm talcum powder, heat up to 50 ° C, and react 2 hours, cooling down, filtering, filtering out solids, washing with absolute ethanol 3 times, and drying to obtain mercaptopropyl modified talc powder 2.

[0042] Add 100 parts of mercaptopropyl-modified talc powder 2, 20 parts of 1-allyloxy-4-hydroxyanthraquinone-9,10-dione, 500 parts of tetrahydrofuran and 4 parts of benzoin dimethyl ether into the container at room temperature Under stirring, irradiate for 25 minutes under ultraviolet light with a dominant wavelength of 365 nm and a light intensity of 20 W / cm, filter, and wash the filtered solid three times with absolute ethanol, and dry to obtain talc powder 2 grafted with a redox mediator.

[0043] The S element content of talc powder before and after grafting ...

Embodiment 3

[0045] Stir 100 parts of absolute ethanol, 25 parts of 3-mercaptopropyltriethoxysilane and 1 part of dilute hydrochloric acid with a mass concentration of 0.1 wt% at room temperature for 1 hour, add them to 100 parts of 100 μm tourmaline, and heat up to 70 °C , reacted for 3 hours, lowered the temperature, filtered, the filtered solid was washed 3 times with absolute ethanol, and dried to obtain mercaptopropyl-modified wollastonite 1.

[0046] Add 100 parts of mercaptopropyl modified wollastonite 1, 30 parts of 1-allyloxy-4-hydroxyanthraquinone-9,10-dione, 800 parts of toluene and 6 parts of benzoin dimethyl ether into the container, Under stirring at room temperature, irradiate for 5 minutes under ultraviolet light with a dominant wavelength of 365 nm and a light intensity of 150 W / cm, filter, and wash the filtered solid with absolute ethanol three times, and dry to obtain wollastonite 1 grafted with a redox mediator.

[0047] The S element content of wollastonite before and ...

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Abstract

The invention belongs to the field of water treatment, relates to the field of treatment of pollutant-containing wastewater and particularly relates to a method for grafting a redox mediator on the surface of inorganic filler and application. The method comprises the following steps: taking a thiopropyl silane coupling agent and the inorganic filler to react, so as to obtain thiopropyl modified inorganic filler; then carrying out mercapto-ene click chemical reaction on the thiopropyl modified inorganic filler and an allyl-containing redox mediator to obtain the inorganic filler with the surface grafted with the redox mediator. The inorganic filler with the surface grafted with the redox mediator, prepared by the method provided by the invention, can be used for rapidly accelerating the degradation of azo dyestuffs and can be repeatedly utilized; the method has the advantages of wide source of raw materials, few reaction steps and low cost; raw materials which easily produce toxic and harmful substances after being in contact with moisture are not needed; the inorganic filler can be widely applied to the treatment of wastewater containing the azo dyestuffs and nitrate.

Description

technical field [0001] The invention relates to the field of water treatment engineering, in particular to a method and application of a redox mediator grafted on the surface of an inorganic filler. Background technique [0002] With the development of society and economy, the population continues to grow. In order to meet people's higher and higher requirements for industrial and agricultural products, a large number of chemical substances are artificially synthesized. The manufacture and use of these chemical substances cause many Wastewater from degraded pollutants is discharged into the environment on which animals, plants and human beings depend, eventually causing serious harm to human health and the entire natural ecosystem. Azo dyes are a kind of difficult biodegradable chemical substances. Because of their simple synthesis process, low cost and outstanding dyeing performance, they have become the most widely used synthetic dyes in the printing and dyeing process of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/10C02F3/00C02F3/28C02F101/16C02F101/30
CPCC02F3/00C02F3/105C02F3/2806C02F2101/163C02F2101/308Y02W10/10
Inventor 严滨董正军叶茜蒋林煜徐苏曾孟祥
Owner XIAMEN UNIV OF TECH
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