Groundwater remediation method by Electro-Fenton reaction using iron cathode

A groundwater remediation and groundwater technology, which is applied in the direction of contaminated groundwater/leachate treatment, chemical instruments and methods, water/sewage treatment, etc. It can solve the problems of large amount of iron sludge, iron anode corrosion loss, limited capacity, etc. , to reduce the production of iron sludge, avoid potential risks, and shorten the treatment time

Active Publication Date: 2013-03-20
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Unlike wastewater treatment, issues such as Fe(II) supply and pH adjustment difficulties exist during groundwater remediation
The supply of Fe(II) has the following problems: ①When the sacrificial anode method is used to produce Fe(II), the amount of Fe(II) and the final iron sludge production are large, and the corrosion loss of the iron anode is very serious; ②When When Fe(II) is added from an external source, due to the large amount of Fe(II) at the beginning, it cannot be fully utilized and regulated, and a part of Fe(II) will be oxidized to Fe(III) under the action of anode oxygen, and Fe(III) The ability to reduce to Fe(II) at the

Method used

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  • Groundwater remediation method by Electro-Fenton reaction using iron cathode
  • Groundwater remediation method by Electro-Fenton reaction using iron cathode
  • Groundwater remediation method by Electro-Fenton reaction using iron cathode

Examples

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Example Embodiment

[0017] ① Electrode material selection: Inert conductive materials such as titanium coating are selected for anode; cast iron is selected for cathode A; conductive materials such as titanium coating are selected for cathode B; the shapes of anode, cathode A and cathode B are mesh or perforated plate.

[0018] ②Installation of electrodes, catalysts and reactors: such as figure 1 As shown, anode 1, cathode A2 and cathode B4 are installed in sequence from bottom to top, the distance between anode 1 and cathode A2 is 2~40cm, and the distance between cathode A2 and cathode B4 is 4~80cm; A varistor 8 is set between the cathodes A2, three electrodes are connected with the DC power supply 6 to form an electrolytic circuit, and an ammeter 7 is used to measure the current in the circuit; the loaded palladium catalyst 3 is filled between the cathode A2 and the cathode B4 close to the cathode A2, and the filling thickness is It is 1~5cm, and the mass ratio content of palladium in the suppo...

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Abstract

The invention relates to a groundwater remediation method by Electro-Fenton reaction using an iron cathode. Specifically, an inert conductive material is used as an anode; iron is used as a cathode A; a conductive material is used as a cathode B; hydrogen peroxide is in situ generated by hydrogen and oxygen, which are produced by electrolyzing the groundwater, under the action of a catalyst; highly strong oxide is generated with the existence of Fe(II) and in a weak acid condition with the pH being 3 to 3.5 to oxidize and decompose the organic pollutants in the groundwater, so as to achieve the in-situ remediation of the organically contaminated groundwater; and the Fe(II) is in situ generated by using the iron cathode A in the weak acid condition with the pH being 3 to 3.5, which is formed under the electrochemical action automatically. By the method, the Fe(II) at a certain concentration is in situ generated by using the iron as one cathode and in the weak acid condition, which is formed under the electrochemical action automatically; and the method is flexible and controllable in the processing effect and environment-friendly in the processing process.

Description

technical field [0001] The invention relates to an iron-cathode electric Fenton groundwater restoration method, which belongs to the technical field of groundwater restoration. Background technique [0002] Groundwater is widely used as a source of drinking water. However, groundwater in many cities is polluted to varying degrees. The pollution caused by toxic organic substances such as chlorinated hydrocarbons, benzene series, ethers, etc. is particularly serious. The overall pollution situation is very serious. In groundwater pollution, the contamination of groundwater by small-area sites characterized by source pollution has received high attention due to the high degree of pollution and serious hazards. Therefore, it is of great significance to remediate the groundwater of the polluted site caused by toxic organic substances. [0003] Electro-Fenton technology has attracted great attention in the field of water treatment due to its advantages of good treatment effect, f...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F1/461C02F103/06
Inventor 袁松虎廖鹏
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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