A system for purifying soil polluted by refractory organic pesticides
An organic pollution and refractory technology, applied in the field of environmental engineering, can solve problems such as the remediation of contaminated sites that are difficult to apply to OCPs, and achieve the effect of efficient degradation
Inactive Publication Date: 2017-01-25
SOUTHEAST UNIV
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Problems solved by technology
[0005] However, the existing microbial remediation technology is difficult to apply to the remediation of high-concentration OCPs-contaminated sites
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[0015] Such as figure 1 As shown, the system for establishing microbial fuel cells to purify refractory organic pollutants in the soil of the present invention is distributed with a buffer soil layer, an anode layer 4 , a soil layer to be treated 2 , and a cathode layer 5 from bottom to top. Wherein the anode layer and the cathode layer are respectively provided with an anode conductive material 3 and a cathode conductive material 6, for example, buried titanium mesh or carbon cloth etc. to enhance conductivity, which are respectively led out by wires and connected to an external resistor 1. The soil MFC established in the soil has a good effect on the removal of organic matter, and the organic matter in the soil is degraded by a large number of microorganisms in the inoculated anaerobic sludge.
[0016] The target soil is in a strict anaerobic environment, and the anaerobic digestion process of attached microorganisms removes organic matter in the soil. At this time, the act...
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Abstract
The invention discloses a system and a method for purifying soil with pesticide degradation-resistant organic pollutants by using a microbial fuel cell. The system comprises an anode layer (4), a cathode layer (5), an anode conductive material (3), a cathode conductive material (6), a lead and an external resistor (1), wherein the anode layer (4) and the cathode layer (5) are respectively arranged on two sides of a soil layer to be treated; the anode conductive material (3) is arranged in the anode layer; the cathode conductive material (6) is arranged in the cathode layer; the lead is connected with the anode conductive material and the cathode conductive material; the external resistor (1) is connected to the lead. By using the system and the method for purifying the soil with the pesticide degradation-resistant organic pollutants by using the microbial fuel cell, the pesticide degradation-resistant organic pollutants can be efficiently degraded in the soil under the condition that the soil structure is not damaged.
Description
technical field [0001] The invention belongs to the field of environmental engineering, in particular to a method and system for treating soil polluted by pesticides based on microbial dye cells. Background technique [0002] Water, soil and other media in the natural environment have the "purification" effect of pollutants, and can degrade some toxic pollutants, but there are still some organic substances that cannot be degraded by microorganisms, or the time required for degradation is extremely long, which can no longer be controlled The environmental risks it produces, such as organochlorine pesticides, organophosphorus pesticides, carbamate pesticides and herbicides, etc. The above substances have the characteristics of persistent residue, bioaccumulation, semi-volatility and high toxicity. Due to its high octanol-water partition coefficient, it is easy to distribute from the water phase to the organism and accumulate in the biological fat, and further enrich, concentr...
Claims
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IPC IPC(8): B09C1/08
Inventor 李先宁宋海亮吴磊曹羡余春艳
Owner SOUTHEAST UNIV