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Method for treating printing and dyeing wastewater by using magnetic graphene-based Fen+ three-dimensional electrode heterogeneous electro-Fenton

A magnetic graphene, printing and dyeing wastewater technology, applied in the direction of water/sewage treatment, chemical instruments and methods, oxidized water/sewage treatment, etc., can solve the problems of unstable degradation and unsatisfactory reuse effect, so as to increase the electrolysis space, Improve the current efficiency and treatment effect, and the effect of wide pH value adaptation range

Active Publication Date: 2019-04-16
GUANGDONG ENG TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Many scholars have studied particle materials with catalytic functions (activated carbon, metal conductive particles, ceramics, etc.) as three-dimensional electrodes, but there are defects of unstable degradation and unsatisfactory repeated use effect

Method used

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  • Method for treating printing and dyeing wastewater by using magnetic graphene-based Fen+ three-dimensional electrode heterogeneous electro-Fenton
  • Method for treating printing and dyeing wastewater by using magnetic graphene-based Fen+ three-dimensional electrode heterogeneous electro-Fenton
  • Method for treating printing and dyeing wastewater by using magnetic graphene-based Fen+ three-dimensional electrode heterogeneous electro-Fenton

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Embodiment 1

[0044] The present invention adopts magnetic graphene-based Fe n+ An embodiment of the method for processing printing and dyeing wastewater by three-dimensional particle electrode heterogeneous electro-Fenton, the method for processing printing and dyeing wastewater includes the following steps:

[0045] 1) The magnetic graphene-based Fe n+ Particle materials are added to the reaction tank of printing and dyeing wastewater;

[0046] 2) After fully mixing evenly, adjust the pH value of the sewage to 3, 6, 9, and 11 respectively, and carry out mechanical stirring and aeration to make the magnetic graphene-based Fe n+ The particle material is suspended in the reaction tank;

[0047] 3) At an electrolysis current of 0.65A and a current density of 8.89mA / cm 2 Magnetic separation and precipitation were carried out after 240 min of electro-Fenton reaction to recover magnetic graphene-based Fe n+ Particle material; measure effluent COD, methylene blue concentration value, and calc...

Embodiment 2

[0053] The present invention adopts magnetic graphene-based Fe n+ An embodiment of the method for processing printing and dyeing wastewater by three-dimensional particle electrode heterogeneous electro-Fenton, the method for processing printing and dyeing wastewater includes the following steps:

[0054] 1) The magnetic graphene-based Fe n+ Particle materials are added to the reaction tank of printing and dyeing wastewater;

[0055] 2) After fully mixing evenly, adjust the pH value of the sewage to 6, and carry out mechanical stirring and aeration to make the magnetic graphene-based Fe n+ The particle material is suspended in the reaction tank;

[0056] 3) At an electrolysis current of 0.65A and a current density of 8.89mA / cm 2 Magnetic separation and precipitation were carried out after 240 min of electro-Fenton reaction to recover magnetic graphene-based Fe n+ Particle material; measure effluent COD, methylene blue concentration value, and calculate its removal rate;

...

Embodiment 3

[0063] The present invention adopts magnetic graphene-based Fe n+ An embodiment of the method for processing printing and dyeing wastewater by three-dimensional particle electrode heterogeneous electro-Fenton, the method for processing printing and dyeing wastewater includes the following steps:

[0064] 1) The magnetic graphene-based Fe n+ Particle materials are added to the reaction tank of printing and dyeing wastewater;

[0065] 2) After fully mixing evenly, adjust the pH value of the sewage to 6, and carry out mechanical stirring and aeration to make the magnetic graphene-based Fe n+ The particle material is suspended in the reaction tank;

[0066] 3) At an electrolysis current of 0.16A and a current density of 2.2mA / cm 2 Magnetic separation and precipitation were carried out after 220 min of electro-Fenton reaction to recover magnetic graphene-based Fe n+ Particle material; measure effluent COD, methylene blue concentration value, and calculate its removal rate; test...

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Abstract

The invention discloses a method for treating printing and dyeing wastewater by using magnetic graphene-based Fen+ three-dimensional electrode heterogeneous electro-Fenton. The method includes the following steps that 1, a magnetic graphene-based Fen + particle material is added into a reaction tank of the printing and dyeing wastewater; 2, after full mixing, the pH value of sewage is adjusted tobe 3-11; 3, an electro-Fenton reaction is carried out under the condition that the electrode current is 0.16-0.98 A, finally, the product stands still, and the particle electrode material is obtainedthrough magnetic separation and recovery, wherein the magnetic graphene-based Fen+ heterogeneous catalyst particle material serves as a third electrode, between an anode plate and a cathode plate, ofthe reaction tank, and a three-dimensional particle electrode reaction device is formed. The method has the advantages that the treatment effect is good, the pH value is wide application range, the particle electrode can be repeatedly used, secondary pollution is avoided, the current efficiency is high and the electrocatalytic activity is stable.

Description

technical field [0001] The invention relates to the technical field of environmental functional materials and water treatment, in particular to a magnetic graphene-based Fe n+ Three-dimensional particle electrode heterogeneous electro-Fenton method for treating printing and dyeing wastewater. Background technique [0002] Printing and dyeing wastewater contains a large amount of residual dyes, the concentration changes greatly, the pollution components are complex, the chemical oxygen demand, chroma, salt content are high, BOD 5 / COD is low, and the dye has strong anti-oxidation and photolysis resistance, is difficult to biodegrade, has "three effects" effects, and is also harmful to animal and human health. Therefore, the deep removal of dye pollutants in wastewater is one of the research hotspots and difficulties in the field of environmental remediation. [0003] With its high reactivity, advanced oxidation technology can convert organic pollutants, especially trace and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/72
CPCC02F1/46109C02F1/467C02F2101/308C02F2001/46142
Inventor 姚创杨远秀唐源胜饶俊元刘建新黄弦王万证涂家财侯明才郭婉婷黄俏
Owner GUANGDONG ENG TECH INST