A method for in-situ electrochemical circulation well repair of chlorinated hydrocarbon polluted groundwater
An in-situ electrochemical and remediation method technology is applied in the field of in-situ electrochemical circulation well remediation of chlorinated hydrocarbon-contaminated groundwater, which can solve the problems of pollutant leakage, groundwater level rise, affecting in-situ water flow field, etc., and achieves low voltage. , the effect of short distance between poles
An in-situ electrochemical and remediation method technology is applied in the field of in-situ electrochemical circulation well remediation of chlorinated hydrocarbon-contaminated groundwater, which can solve the problems of pollutant leakage, groundwater level rise, affecting in-situ water flow field, etc., and achieves low voltage. , the effect of short distance between poles
CN110357348BActive Publication Date: 2021-12-28CHINA UNIV OF GEOSCIENCES (WUHAN)
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[0046] refer to figure 2 , using plexiglass tanks to build a simulated aquifer, the dimensions of the plexiglass tanks are: length x width x height = 80 x 60 x 60cm 3 , the plexiglass tank is filled with 1-4m of actual sediment from a certain place in the Jianghan Plain, mainly sandy soil, with a permeability coefficient of about 10 -2 cm / s, install transparent plexiglass tubes as water injection wells and pumping wells 5cm away from the left and right sides of the plexiglass tank. The outer diameter of the transparent plexiglass tubes is 50mm, the inner diameter is 40mm, and the length is 70cm. The bottom of the tube is closed, and 6 holes (aperture is 0.5cm) are opened in a circle every 5cm at the side 45cm of two transparent plexiglass tubes to communicate with the outside, and nylon gauze is put on around the transparent plexiglass tube as a filter screen; Coated with IrO 2 and Ta 2 o 5 The plate-shaped titanium-based electrode is used as the cathode and anode. The si...
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Abstract
The invention provides a method for repairing in-situ electrochemical circulation wells polluted by chlorinated hydrocarbons. The steps are as follows: dig wells in groundwater polluted areas, and install well pipes in the wells, wherein every two wells form a group, and in each group of wells, One well is used as a water injection well, and the other well is used as a water pumping well. The top end of the well pipe is open and the bottom end is closed. Several small holes are opened on the lower end of the well pipe; the anode plate is suspended into the water injection well and the cathode plate, the anode plate and the cathode plate are respectively connected to the positive pole and the negative pole of the power supply arranged outside the well through wires; the power supply is started to energize the anode plate and the cathode plate, and at the same time, the groundwater in the pumping well is continuously pumped by a water pump and injected into the water injection well In order to strengthen the groundwater flow circulation, the hydrogen and oxygen produced in the water injection wells diffuse to the aquifer under the action of the groundwater flow circulation to promote the chemical / microbial degradation of chlorinated hydrocarbons in the groundwater. The restoration method provided by the invention has stable effects and is environmentally friendly.
Description
technical field [0001] The invention relates to the field of groundwater treatment, in particular to an in-situ electrochemical circulation well repair method for chlorinated hydrocarbon polluted groundwater. Background technique [0002] In recent years, chlorinated hydrocarbons such as carbon tetrachloride, chloroform, dichloroethane, trichloroethylene (TCE), and tetrachloroethylene have been used in large quantities as organic solvents, cleaning agents, and chemical raw materials, causing serious pollution to soil and groundwater environments. . Taking TCE as an example, statistics show that as of 2012, the total production capacity of trichlorethylene in my country was close to 570,000 tons / year, and the production capacity has exceeded one million tons / year in recent years. Chlorinated hydrocarbons are extremely harmful to the human body and have strong carcinogenic, teratogenic, and mutagenic properties. They are currently key pollutants controlled by various countrie...
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Patent Timeline
28 Dec 2021
Publication
CN110357348B
- IPC
- C02F9/14; C02F1/461; C02F101/36
- CPC
- C02F3/301; C02F1/46104; C02F2101/36
- Inventors
- θ’ζΎθ; εζ΄