Preparation method and application of polypyrrole functional mediator doped with water-soluble anthraquinone or naphthoquinone compound

A compound and water-soluble technology, which is applied in the field of preparation of polypyrrole functional mediators, can solve the problems of restricting catalytic performance and low doping, and achieve the effects of reducing secondary pollution, good stability, and not easy to lose

Inactive Publication Date: 2011-12-14
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Description
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AI Technical Summary

Problems solved by technology

However, the molar ratio of pyrrole to counter anion in the prepared AQDS / PPy / ACF redox mediator is only 6:1, and the doping ratio is low. On the one hand, it restricts the catalytic performance of the AQDS / PPy / ACF functional mediator. On the one hand, whether the polypyrrole functional mediator doped with water-soluble quinones can catalyze the microbial denitrification process has not been reported at home and abroad.

Method used

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  • Preparation method and application of polypyrrole functional mediator doped with water-soluble anthraquinone or naphthoquinone compound
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  • Preparation method and application of polypyrrole functional mediator doped with water-soluble anthraquinone or naphthoquinone compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Preparation of polymerization solution

[0033] Get 150mL double-distilled water in a 200mL beaker, add 1.1818g anthraquinone-2-sodium sulfonate to dissolve, and make a concentration of 0.024mol / l anthraquinone-2-sodium sulfonate solution, then adjust the pH with dilute sulfuric acid to 3. Then add 1 mL of pyrrole, stir for 5 minutes, and mix well; among them, pyrrole needs to be distilled twice before polymerization to remove impurities formed by oxidation in the air.

[0034] (2) Pretreatment of activated carbon felt and platinum electrode

[0035] Activated carbon felt: Cut the activated carbon felt into felt pieces with a side length of 3cm×3cm, soak and wash with deionized water three times, dry at 110~120°C, and store for later use;

[0036] Platinum sheet electrode: put the platinum sheet electrode into nitric acid solution with a volume ratio of 1:1 and 1mol / L NaOH solution in turn for 5 minutes each; then ultrasonically clean it in double distilled water, ...

Embodiment 2

[0086] (1) Preparation of polymerization solution

[0087] Get 150mL double-distilled water in a 200mL beaker, add 1.1818g anthraquinone-1-sodium sulfonate to dissolve, and make a concentration of 0.024mol / l anthraquinone-1-sodium sulfonate solution, then use dilute sulfuric acid to adjust the pH to 5. Then add 0.5mL pyrrole, stir for 5 minutes, and mix well; among them, pyrrole needs to be distilled twice before polymerization to remove impurities formed by oxidation in the air.

[0088] (2) Carry out pretreatment to activated carbon felt and platinum electrode, same as embodiment 1.

[0089] (3) Embed the pretreated platinum sheet electrode in step (2) into the activated carbon felt, and then insert it into the 200mL beaker containing the polymerization solution described in step (1), and use cyclic voltammetry to analyze The polymerization solution of sodium anthraquinone-1-sulfonate is subjected to cyclic voltammetry electrochemical polymerization, and the electrochemical...

Embodiment 3

[0095] (1) Preparation of polymerization solution: The difference from Example 1 is that 1.1932 g of sodium anthraquinone-1,5-disulfonate was weighed, the pH was adjusted to 7, and 1 mL of pyrrole was added.

[0096] (2) Carry out pretreatment to activated carbon felt and platinum electrode, same as embodiment 1.

[0097] (3) The difference from Example 1 is that the cyclic voltammetric electrochemical polymerization is carried out on the polymerization solution of sodium anthraquinone-1,5-disulfonate by cyclic voltammetry, and the electrochemical polymerization conditions are: polymerization potential: 0.30~ 0.50V; polymerization time: 1h; potential change rate: 0.03V / s.

[0098] Then, according to the steps of Example 2, the degradation test of nitrate and nitrite was carried out on the activated carbon felt doped with anthraquinone-1,5-sodium disulfonate prepared in this example, and the results can be found in Figure 11 and Figure 12 : Activated carbon felt doped with ...

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Abstract

The invention discloses a preparation method of a polypyrrole functional mediator doped with a water-soluble anthraquinone or naphthoquinone compound and application thereof. Specifically, the preparation method comprises: (1) preparing a polymerization solution: firstly preparing a saturated solution of the water-soluble anthraquinone or naphthoquinone compound, then adding 0.33-0.67mL of pyrrole to every 100mL of the saturated solution and mixing well; (2) pretreating active carbon felt and platinum plate electrodes; (3) embedding the pretreated platinum plate electrodes in step (2) into the active carbon felt, then conducting electrochemical polymerization in the polymerization solution, with a polymerization potential of 0.30-0.50V, a polymerization time of 1-3h and a potential changerate of 0.03-0.07V/s. The polypyrrole functional mediator provided in the invention plays an accelerating role in a microorganism denitrification process, and is recyclable and free of secondary pollution.

Description

technical field [0001] The invention belongs to the technical field of biological treatment of wastewater, in particular to a preparation method and application of a polypyrrole functional mediator doped with a water-soluble quinone compound. Background technique [0002] Nitrogen pollution is currently a topic of international concern. Excessive nitrogen compounds entering natural water bodies will not only deteriorate the quality of water environment, affect the quality of drinking water and forest ecosystems, but also cause serious harm to human health and the survival of animals and plants. First of all, nitrogen is the main factor causing eutrophication of water bodies. When a large amount of sewage containing nitrogen nutrients is directly discharged into the receiving water body, it will lead to abnormal growth of algae and other aquatic plants, consume dissolved oxygen in water, and cause deterioration of water quality. The structure of the water ecological environm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B3/00C02F3/28
Inventor 郭建博廉静郭延凯杨景亮罗湘南刘春李再兴蒋静智陈建荣
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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