Activated carbon cathode electro-Fenton system and method for removing halogenated hydrocarbon in underground water by using activated carbon cathode electro-Fenton system

A technology of activated carbon and cathode, applied in chemical instruments and methods, water/sewage treatment, special compound water treatment, etc., can solve the problems of mass transfer effect not being maximized, injection well pipe clogging, cost increase, etc., and achieve repeatability The effect of high utilization rate, improved utilization rate and strong stability

Active Publication Date: 2021-07-23
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, there are problems such as Fe2+ and oxygen supply in the process of groundwater pollution remediation: (1) Fe2+ produced by the sacrificial anode method will increase the output of iron sludge, However, external Fe2+ is easily oxidized to form iron hydroxide and loses its catalytic activity, which

Method used

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  • Activated carbon cathode electro-Fenton system and method for removing halogenated hydrocarbon in underground water by using activated carbon cathode electro-Fenton system
  • Activated carbon cathode electro-Fenton system and method for removing halogenated hydrocarbon in underground water by using activated carbon cathode electro-Fenton system
  • Activated carbon cathode electro-Fenton system and method for removing halogenated hydrocarbon in underground water by using activated carbon cathode electro-Fenton system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The cathodic electro-Fenton system degrades trichlorethylene (TCE), the anode is an MMO electrode, and the cathode is a stainless steel mesh-filled activated carbon layered electrode. Reaction conditions:

[0060] Reactor volume: 2.4L; Current: 100mA; Electrolyte: 50mM Na 2 SO 4 .

[0061] Step 1. Electrode design: the anode uses MMO electrodes, and the cathode uses stainless steel mesh filled with activated carbon (coconut shell) particles. Among them, the stainless steel column materials are all 0.5cm solid stainless steel columns, and the shape of the cathode is a hollow stainless steel mesh box. The size of the stainless steel mesh box is 1cm×5cm×7cm, the total length of the electrode is 35cm, and the mass of activated carbon in each stainless steel mesh box is about 110g.

[0062] Step 2. The cathode and anode are placed horizontally. The oxygen evolution side reaction of the anode generates oxygen, and the hydrogen evolution side reaction generates air flotatio...

example 2

[0067] H in the cathodic electric Fenton system of the present invention 2 o 2 And active oxygen species · OH concentration measurement.

[0068] The cathodic electro-Fenton system degrades TCE, the anode is an MMO electrode, and the cathode is a layered electrode filled with stainless steel mesh and activated carbon. Reaction conditions:

[0069] Reactor volume: 2.4L, current: 100mA; electrolyte: 50mM Na 2 SO 4

[0070] Step 1. Electrode design: the anode uses MMO electrodes, and the cathode uses stainless steel mesh filled with activated carbon (coconut shell) particles. The size of the stainless steel mesh box is 1cm×5cm×7cm, the total length of the electrode is 35cm, and the mass of activated carbon in each stainless steel mesh box is about 110g.

[0071] Step 2 and Step 3 are the same as in Example 1.

[0072] Step 4, fix the electrodes, turn on the power, and the current is 100mA. The continuous experiment was 12 hours, the sampling time was 1, 2, 4, 6, 8, 10, 12...

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PUM

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Abstract

The invention discloses an activated carbon cathode electro-Fenton system which comprises a well casing which is divided into an upper section, a middle section and a lower section, wherein the middle section is a water filter pipe, and the lower section is a precipitation pipe; a plurality of cathodes and a plurality of anodes which are fixed to form a comb tooth structure, wherein the cathodes are stainless steel mesh filled activated carbon cathodes, and the anodes are ruthenium-iridium/iridium-tantalum electrodes; the cathodes and the anodes are arranged in a crossed mode, and the cathode located at the uppermost position is located on the anode located at the uppermost position. The invention also provides a method for removing halogenated hydrocarbon in underground water by using the activated carbon cathode electro-Fenton system. The underground water is repaired by adopting the stainless steel mesh filled activated carbon cathode electro-Fenton technology, the system is used for enhancing the degradation of halogenated hydrocarbon in the underground water, the system has the characteristics of environmental friendliness and simplified operation, and on the basis, the placement mode of the electrode is improved, the oxygen mass transfer effect is enhanced, and external oxygen supply is not needed.

Description

technical field [0001] The invention relates to the technical field of water treatment. More specifically, the present invention relates to an activated carbon cathode electro-Fenton system and its method for removing halogenated hydrocarbons from groundwater. Background technique [0002] In recent years, with the development of industrialization and urbanization, the discharge of various organic wastewater, the seepage of filtrate from urban landfills, the rupture of underground oil pipelines, and the extensive application of agricultural chemicals have led to serious organic pollution of groundwater. As a commonly used chemical raw material, halogenated solvents such as chlorinated hydrocarbons play an important role in the field of industrial cleaning. The research on the control and remediation technology of halogenated hydrocarbon pollution in groundwater has become an important environmental problem that is generally faced in the world. [0003] Halogenated hydrocar...

Claims

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Application Information

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IPC IPC(8): C02F1/461C02F1/72
CPCC02F1/4672C02F1/46109C02F2001/46133C02F2305/023C02F2305/026Y02E60/36
Inventor 崔艳萍多雪文黄颖吴若杰
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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