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Biological photoelectrochemical reagent for synchronously realizing plastic degradation and heavy metal reduction, and preparation method thereof

A photoelectrochemical and biological technology, applied in the field of environmental governance, can solve the problems of complex preparation methods and high energy consumption of carbon fiber membranes, achieve high universality and promotion value, realize recycling and high purification efficiency

Active Publication Date: 2021-12-21
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation method of the carbon fiber membrane is complicated, and the plastic degradation can only be achieved by the electro-Fenton oxidation method, which consumes a lot of energy.

Method used

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  • Biological photoelectrochemical reagent for synchronously realizing plastic degradation and heavy metal reduction, and preparation method thereof
  • Biological photoelectrochemical reagent for synchronously realizing plastic degradation and heavy metal reduction, and preparation method thereof
  • Biological photoelectrochemical reagent for synchronously realizing plastic degradation and heavy metal reduction, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] In the present embodiment, Fusarium oxysporum is used as biological raw material to prepare plastic and heavy metal biophotoelectrochemical reagents, and the specific preparation method is as follows:

[0067] Fusarium oxysporum bacterial solution (50mL, the number of effective viable bacteria: 6.8×10) 6 cells / mL) was added with 10 mg of polymeric carbonized nitrogen (CNx), and placed in an incubator for 24 hours in the dark, so that CNx and electroactive chemoheterotrophic bacteria formed ionic bonds through electrostatic adsorption to form ionic bonds to form a biophotoelectrochemical system. . The solution was then centrifuged at 7500 rpm for 6 min, the supernatant was removed, 0.9% NaCl was added to resuspend, and the resuspension was centrifuged to obtain a biophotoelectrochemical reagent.

[0068] In the present embodiment, the using method of biophotoelectrochemical reagent is:

[0069] The biophotoelectrochemical reagent was added to the sewage containing plas...

Embodiment 2

[0072] In the present embodiment, Fusarium oxysporum is used as biological raw material to prepare plastic and heavy metal biophotoelectrochemical reagents, and the specific preparation method is as follows:

[0073] Fusarium oxysporum bacterial solution (50mL, the number of effective viable bacteria: 6.8×10) 6 Cells / mL) was added with 10 mg of carbon dot-doped polymeric carbonized nitrogen, and placed in an incubator for 24 hours in the dark, so that CNx and electroactive chemoheterotrophs formed ionic bonds through electrostatic adsorption to form ionic bonds to form a biophotonics photoelectricity. chemical system. The solution was then centrifuged at 7500 rpm for 6 min, the supernatant was removed, 0.9% NaCl was added to resuspend, and the resuspension was centrifuged to obtain a biophotoelectrochemical reagent.

[0074] In the present embodiment, the using method of biophotoelectrochemical reagent is:

[0075] The biophotoelectrochemical reagent was added to the sewage ...

Embodiment 3

[0078] In the present embodiment, Fusarium oxysporum is used as biological raw material to prepare plastic and heavy metal biophotoelectrochemical reagents, and the specific preparation method is as follows:

[0079] Fusarium oxysporum bacterial solution (50mL, the number of effective viable bacteria: 6.8×10) 6 Cells / mL) was added with 10 mg of cadmium sulfide (CdS), and placed in an incubator for 24 hours in the dark, so that CdS and electroactive chemoheterotrophs formed ionic bonds through electrostatic adsorption to form ionic bonds to form a biophotoelectrochemical system. Then, the solution was centrifuged at 7500 rpm for 6 min, the supernatant was removed, 0.9% NaCl was added to resuspend, and then the resuspension was centrifuged to obtain a biophotoelectrochemical reagent.

[0080] In the present embodiment, the using method of biophotoelectrochemical reagent is:

[0081] The biophotoelectrochemical reagent was added to the sewage containing plastic and metal ions at...

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Abstract

The invention discloses a biological photoelectrochemical reagent for synchronously realizing plastic degradation and heavy metal reduction, and a preparation method thereof. The biological photoelectrochemical reagent contains a photosensitizer and chemoheterotrophic microorganisms. According to the reagent, plastics in sewage can be degraded into organic acid under the illumination condition based on the photosensitizer attached to cell membranes of chemoheterotrophic bacteria, and degradation products can be utilized by chemoheterotrophic microorganisms, so that heavy metals in the sewage are reduced into metal elementary substances. The metal elementary substances can be attached to the surfaces of microorganisms and the photosensitizer through the self-precipitation effect, so that the cell activity of heterotrophic microorganisms and the light capture efficiency of the photosensitizer are improved, and plastic degradation and heavy metal reduction in sewage are effectively driven. The photoelectrochemical reagent is not limited by special reaction conditions, plastic degradation and heavy metal reduction in sewage can be realized by taking ubiquitous sunlight as driving force, the operation is simple and feasible, and the application value and the economic value are relatively high.

Description

technical field [0001] The invention belongs to the field of environmental treatment, and in particular relates to a biophotoelectrochemical reagent capable of simultaneously realizing plastic degradation and heavy metal reduction and a preparation method thereof. Background technique [0002] Plastic pollution, also known as white pollution, mainly refers to the ecological environment pollution caused by the random disposal of plastic products made of polystyrene, polypropylene, polyvinyl chloride and other polymer compounds after use. Only 10% of these plastics will be recycled, and most of the rest will be left in environmental media through methods such as accumulation or landfill. Studies have shown that plastics are widely distributed in freshwater, marine and groundwater environments, which will not only cause serious environmental pollution, but also a great waste of resources. [0003] Commonly used plastic treatment methods mainly include incineration, landfill an...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F1/30C02F1/46C02F101/20
CPCC02F3/005C02F1/30C02F2101/20Y02W10/37
Inventor 叶捷胡安东陈一平周顺桂
Owner FUJIAN AGRI & FORESTRY UNIV
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