Flat plate type low-temperature plasma soil remediation method and device

Abstract

The invention discloses a flat plate type low-temperature plasma soil remediation method and device. The flat plate type low-temperature plasma soil remediation device comprises a conveying belt madeof a conductive material and connected with a ground wire. A high-voltage electrode layer is arranged on the upper portion of the conveying belt and electrically connected with a low-temperature plasma power source. The low-temperature plasma power source is switched on, and then a low-temperature plasma discharge area is formed between the conveying belt and the high-voltage electrode layer. Thesoil remediation method comprises the steps that the conveying belt conveys contaminated soil to pass through the low-temperature plasma discharge area; the discharge area conducts discharge on the surface and the interior of the contaminated soil; O2, N2 and water molecules in air collide with high-energy electrons in the discharge area, and thus high-energy groups are generated; and the high-energy groups and toxic and harmful substances in the contaminated soil react to generate nontoxic and harmless small-molecule substances. According to the flat plate type low-temperature plasma soil remediation method and device, continuous and large-batch treatment of the contaminated soil is achieved, the treatment effect is good, the cost is low, the period is short, and safety is good.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a flat-plate low-temperature plasma soil remediation method and device. Background technique [0002] Heavy metal pollution has the characteristics of high toxicity, long-term treatment, enrichment and concealment, and it is easy to accumulate through the food chain and seriously affect human health. With the emergence of heavy metal poisoning incidents in recent years, it is particularly important to study efficient, low-cost, green and environmentally friendly soil remediation methods. [0003] At present, the methods adopted at home and abroad to remove heavy metals in soil are mainly divided into physical, chemical and biological methods. Physical methods mainly include activated carbon adsorption, electrode method, electromagnetic method, soaking method and functional paper removal method, etc., which have significant disadvantages such as low adsorption efficiency...

AI Technical Summary

Problems solved by technology

Physical methods mainly include activated carbon adsorption, electrode method, electromagnetic method, soaking method and functional paper removal method, etc., which have significant disadvantages such as low adsorption efficiency, heavy equipment, and inability to composite adsorb various heavy metals.

Chemical methods include chemical precipitation, removal of inorganic and organic acids, extraction, ion exchange, and ion cross-linking, but they have drawbacks such as toxicity, complicated adsorption process, environmental pollution, and inability to desorb and reuse.

Biological methods such as bioflocculation, biosorption and phytoremediation, etc., but this method has disadvantages such as low adsorption efficiency, long treatment period and high treatment cost.

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