Porous matrix-loaded multilayer electrode electrochemical wastewater treatment device as well as preparation method and use method thereof

A multi-layer electrode, porous matrix technology, applied in water treatment parameter control, chemical instruments and methods, water/sewage treatment equipment and other directions, can solve the problems of high energy consumption and poor electrode treatment effect, achieve energy saving, Solve the poor processing effect and increase the effect of removing types

Active Publication Date: 2021-04-09
NANJING UNIV YANCHENG ENVIRONMENTAL PROTECTION TECH & ENG RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to overcome the problems of poor electrode treatment effect and high energy consumption in the prior art, the present invention provides a multi-layer electrode electrochemical wastewater treatment device supported by a porous substrate , using graphite felt multi-layer electrodes with different loads, giving the multi-layer electrodes different potentials, so that a micro-current electrolysis unit is formed between the electrodes. Compared with the traditional DC power supply method, the current efficiency can be improved, and the pollutant treatment can be more efficient. The electrode treatment effect saves energy consumption and solves the problems of poor electrode treatment effect and high energy consumption in the prior art

Method used

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  • Porous matrix-loaded multilayer electrode electrochemical wastewater treatment device as well as preparation method and use method thereof
  • Porous matrix-loaded multilayer electrode electrochemical wastewater treatment device as well as preparation method and use method thereof
  • Porous matrix-loaded multilayer electrode electrochemical wastewater treatment device as well as preparation method and use method thereof

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Experimental program
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Effect test

Embodiment 1

[0053] The multi-layer electrode electrochemical wastewater treatment device supported by a porous substrate of the present invention is applied in the technical field of electrochemical water treatment, and is made of high-purity graphite felt after modification and loading. When the present invention is used to treat wastewater, the pH of domestic sewage influent is 4-14, and the pH of chemical wastewater influent is 2-14. The active substances produced by electrolysis are different under different pH environments, and better treatment can be achieved by adjusting the pH for different sewage types. Effect. The invention comprises a cathode unit and at least two anodes, and the anodes are arranged on opposite sides of the cathode unit to improve the utilization rate of the cathode. The cathode unit includes at least two cathodes, and the arrangement of the cathodes is sequentially arranged from one anode to the other.

[0054] The cathode material is graphite felt with a thi...

Embodiment 2

[0089] The basic content of this embodiment is the same as that of Embodiment 1, and the difference is that in this embodiment, 6 cathodes are arranged in total, and the commercial DSA electrode is an anode, and the specific preparation steps of the cathode are:

[0090] Step 1: Put the graphite felt in 95% absolute ethanol, 5% dilute acid and 5% dilute alkali for ultrasonic cleaning. The cleaning time of each cleaning step is 10min. ℃ drying; the acid used is nitric acid, and the alkali used is sodium hydroxide;

[0091] Step 2: Submerge the cleaned and dried graphite felt to 20% H 2 o 2 solution, heated at a constant temperature of 50°C for 4 hours; after the modification was completed, it was washed with deionized water and dried at 60°C to obtain the modified graphite felt;

[0092]Step 3: use the modified graphite felt to be respectively loaded with salt solutions of cobalt nitrate, copper nitrate, tin nitrate, antimony nitrate, ruthenium nitrate, and cerium nitrate to ...

Embodiment 3

[0095] The basic content of this embodiment is the same as that of Embodiment 1, and the difference is that in this embodiment, 6 cathodes are arranged in total, and the commercial DSA electrode is an anode, and the specific preparation steps of the cathode are:

[0096] Step 1: Put the graphite felt in 95% absolute ethanol, 10% dilute acid and 10% dilute alkali for ultrasonic cleaning. The cleaning time of each cleaning step is 15min. ℃ drying; the acid used is nitric acid, and the alkali used is sodium hydroxide;

[0097] Step 2: Submerge the cleaned and dried graphite felt to 30% H 2 o 2 solution, heated at a constant temperature of 55°C for 5 hours; after the modification was completed, it was washed with deionized water and dried at 100°C to obtain a modified graphite felt;

[0098] Step 3: the modified graphite felt is respectively loaded with salt solutions of tin chloride, antimony chloride, cobalt chloride, cupric chloride, cerium chloride, and ruthenium chloride to...

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Abstract

The invention belongs to the technical field of electrochemical water treatment, and relates to a porous matrix-loaded multilayer electrode electrochemical wastewater treatment device as well as a preparation method and a use method thereof. The device comprises a cathode unit and at least two anodes, wherein the anodes are arranged on two opposite sides of the cathode unit; the cathode unit comprises at least two cathodes, and the cathodes are sequentially arranged along a direction from the anode on one side to the cathode on the other side; and the cathodes are made graphite felt, potentials supplied to any two adjacent cathodes are different, and loads on any two adjacent cathodes are different. Compared with a traditional direct-current power supply mode, the device of the invention has the advantages that current efficiency can be improved, pollutant treatment is more efficient, electrode treatment effect is improved, energy consumption is reduced, and the problems that electrode treatment effect is poor and use energy consumption is high in the prior art are solved.

Description

technical field [0001] The invention belongs to the technical field of electrochemical water treatment, and relates to a multilayer electrode electrochemical wastewater treatment device supported by a porous substrate, a preparation method and a use method thereof. Background technique [0002] The treatment of refractory high-concentration organic and toxic industrial wastewater is the current research focus in the water treatment industry. Conventional treatment methods include physical separation, chemical oxidation, and biodegradation. Among them, the electrochemical catalytic oxidation technology is an environmentally friendly advanced oxidation technology, which uses high-activity products such as hydroxyl radicals and active chlorine generated by electrolysis to degrade various organic pollutants. Carbon denitrification, which has the advantages of green efficiency, good flexibility, and no secondary pollution, is one of the hotspots in water treatment technology rese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461
CPCC02F1/46176C02F1/46109C02F2001/46142C02F2201/46105C02F2209/08C02F2209/16C02F2301/046C02F2303/14
Inventor 姜笔存高泽楠于伟华宋均轲屈晋云谈政焱司徒瑜霞刘浩亮林加文贺雨舟
Owner NANJING UNIV YANCHENG ENVIRONMENTAL PROTECTION TECH & ENG RES INST
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