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Liquid anode and method for enriching and separating anions in water body

An anode and liquid technology, applied in the field of water treatment, can solve the problems such as the difficulty of effectively removing anions, achieve the effect of accelerating the exchange current density, simple preparation, and wide application range

Active Publication Date: 2020-10-13
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that it is difficult to effectively remove anions in wastewater, the present invention provides a liquid anode with simple operation, large adsorption capacity of adsorption material, low operating voltage, and high efficiency; Composition, using the hydrophobic liquid as the main body of the electrode, the hydrophilic film as the immobilized film, and the conductive electrode as the electrified medium; that is, the hydrophobic liquid is filled in the bag made of the hydrophilic immobilized film, and then the conductive electrode is placed on it. liquid anode

Method used

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  • Liquid anode and method for enriching and separating anions in water body
  • Liquid anode and method for enriching and separating anions in water body
  • Liquid anode and method for enriching and separating anions in water body

Examples

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Effect test

Embodiment 1

[0022] Embodiment 1: liquid anode structure such as figure 1 As shown, including hydrophilic PVC solid-carrying film 1, hydrophobic dianionic ionic liquid 2, and Fe electrode 3; the hydrophobic liquid is filled in a bag made of hydrophilic solid-carrying film, and then the conductive electrode is placed in it Prepare a liquid anode;

[0023] The preparation method of hydrophilic PVC immobilized film is as follows: dissolve 3.6g of polyvinyl chloride in 38.6g of dimethylacetamide solution, stir until it is completely dissolved, add 0.41g of vinyl acetate, and keep stirring, Add 1.5g of nano-alumina powder during the stirring process, then immediately add 0.3g of dispersant sodium hexametaphosphate, and finally add 2.0g of pore-forming agent polyvinylpyrrolidone, stir evenly for 24 hours, seal and stand for defoaming, and then cast the film Cast the solution on a clean glass plate, scrape it until it forms a film, volatilize for 60 seconds, put it into the 25% ethanol coagulati...

Embodiment 2

[0026] Embodiment 2: liquid anode structure such as figure 2 As shown, it includes hydrophilic PVA solid-carrying film 1, hydrophobic conductive liquid 2, and Cu electrode 3; the hydrophobic liquid is filled in a bag made of hydrophilic solid-carrying film, and then the conductive electrode is placed in it to obtain a liquid state anode;

[0027] The preparation method of the hydrophilic PVA immobilized membrane is as follows: Weigh 6g of PVA into 54mL of distilled water, and heat to completely dissolve the PVA in distilled water, then add 4.20g of glacial acetic acid to the solution, stir evenly to prepare a membrane-making solution, Stand by after soaking off. Wet the clean polyester filter cloth with water and lay it flat on the glass plate, flat and free of air bubbles, pour the film-making solution on the filter cloth, scrape it into a liquid film with a uniform thickness with a glass rod, put the prepared film on the Dry in an oven at 60°C for 3 hours, then air-dry na...

Embodiment 3

[0030] Embodiment 3: liquid anode structure such as image 3 As shown, it includes hydrophilic PVDF solid-carrying film 1, hydrophobic conductive liquid 2, and graphite electrode 3; the hydrophobic liquid is filled in a bag made of hydrophilic solid-carrying film, and then the conductive electrode is placed in it to obtain a liquid state anode;

[0031] The hydrophilic PVDF immobilized membrane is prepared as follows: PVDF is selected as material, N,N-dimethylacetamide (DMAc) is used as solvent, polyvinylpyrrolidone (PVP) and polyethylene glycol (PEG) are used as additives, among which PVDF and PVP 18% and 14% respectively, and the molecular weight of PEG is 200. PVDF, PVP and PEG are mixed and dissolved in DMAc, and after static defoaming and filtration, a casting solution is formed, heated to ripening, and vacuum degassed in a vacuum box again. Then use a frame-type applicator to form a film on flat glass, put it in a coagulation bath, and soak it in alcohol and distilled w...

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Abstract

The invention discloses a liquid anode which is composed of hydrophobic liquid, a hydrophilic immobilization film and a conductive electrode; a bag made of the hydrophilic immobilization film is filled with the hydrophobic liquid, and then the conductive electrode is placed in the bag, and therefore, the liquid anode can be prepared; the hydrophobic liquid is hydrophobic ionic liquid or hydrophobic conductive liquid. Compared with a traditional anode material, the liquid anode is simple in preparation method, large in electrode specific surface area and large in capacitance; physical adsorption, chemical adsorption and electric adsorption are organically coupled, so that the liquid anode is suitable for treating complex anions in water, and the problems of small current density, failure torealize efficient mass transfer, low electrolysis efficiency and large power consumption of a conventional electrode electrolyzing low-concentration wastewater can be solved.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a method for enriching and separating anions in a water body by a liquid anode. Background technique [0002] There are many ionic pollutants in the form of anions in water, most of which have certain potential or significant toxicity and can cause water environmental problems to varying degrees. Nitrate (NO 3 - ), phosphate (PO 4 3- ) The most direct harm is to cause eutrophication of the water body, deteriorate the sensory properties of the water body, and destroy the ecological balance of the water body. Perchlorate (ClO 4 - ) Although it cannot cause acute toxicity to organisms in the water body, its impact on chronic toxicity cannot be ignored. Most of the heavy metals in water exist in the form of positively charged metal hydrate ions, and a small part exist in the state of metal complex anions and oxyacid anions. Because the existence and propert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/469
CPCC02F1/469C02F2201/46
Inventor 李军燕杨聪庆瞿广飞王芳赵驰
Owner KUNMING UNIV OF SCI & TECH
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