Heavy metal contaminated soil remediation device and isolated remediation method

Abstract

The invention discloses a heavy metal contaminated soil remediation device which comprises a contaminated soil layer (1), wherein an isolated adsorption layer (2) covers the contaminated soil layer (1), and a soil dressing layer (4) is arranged on the upper surface of the isolated adsorption layer (2); accumulator plants (5) are planted on the soil dressing layer (4), and a permeable layer (3) is arranged in the soil dressing layer (4); a plurality of water collecting pipes (6) are arranged in the permeable layer (3), and a plurality of water inlet holes (8) are formed in the water collecting pipes (6). The invention further discloses an isolated remediation method using the device. The method comprises the following steps: adsorbing heavy metals in contaminated soil through the isolated adsorption layer (2), then enriching the heavy metals through the accumulator plants (5), removing the accumulator plants (5), and removing the heavy metals in the soil. The heavy metal contaminated soil remediation device has the advantages of low cost, small occupying space and high contaminated soil remediation efficiency.

Description

technical field [0001] The invention relates to heavy metal contaminated soil restoration, in particular to a heavy metal contaminated soil restoration device and an isolation restoration method. Background technique [0002] Soil pollution can be roughly divided into two categories: inorganic pollutants and organic pollutants. Inorganic pollutants mainly include acids, alkalis, heavy metals, salts, compounds of radioactive elements cesium and strontium, compounds containing arsenic, selenium and fluorine, etc. Organic pollutants mainly include organic pesticides, phenols, cyanides, petroleum, synthetic detergents, 3,4-benzopyrene, and harmful microorganisms brought by urban sewage, sludge, and manure. When there are too many harmful substances in the soil and exceed the self-purification capacity of the soil, the composition, structure and function of the soil will change, the microbial activities will be inhibited, and the harmful substances or their decomposition product...

AI Technical Summary

Problems solved by technology

Some mines have not established rock dumps and tailings ponds during mining, and waste rocks and tailings are piled up randomly, resulting in the heavy metals rich in tailings entering the soil, and the remaining metal waste residues after ore processing enter the groundwater system with rainwater, causing serious damage. soil heavy metal pollution

[0004] However, heavy metals in contaminated soil are difficult to degrade, so the remediation of heavy metal-contaminated soil is still a big problem

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