Remediation method and device for heavy metal contaminated soil

Abstract

The invention relates to the technical field of soil remediation, and provides a remediation method and device for heavy metal contaminated soil. The contaminated soil is isolated in situ, an isolation area is formed, and the contaminated soil does not need to be transferred; the isolated contaminated soil is leached by adopting an eluting agent, the content of the heavy metals in leaching liquidis regularly detected, the leaching liquid is extracted from the isolation area after the content reaches a set value, a soil sample is collected regularly for detection in the leaching process, leaching is stopped after the soil sample passes detection, and thus the preliminary treatment and purification are carried out on the heavy metal contaminated soil in situ; and an improvement agent is added to the soil of the isolation area after leaching is stopped, remediation plants are planted on the soil after the improvement agent is added and are used for performing ecological remediation, andthus further remediation and purify are carried out. According to the remediation method and device for the heavy metal contaminated soil, the remediation cycle of the contaminated soil is greatly shortened by the dual remediation effects, moreover, a good landscape effect is achieved while remediation achieved, and the durability of the remediation effect is realized.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a method and device for remediating heavy metal-contaminated soil. Background technique [0002] With the development of society and economy, people's requirements for the environment are getting higher and higher, and relevant laws, regulations and norms on the remediation of heavy metal-contaminated soil have been issued. The market demand for remediation of heavy metal-contaminated soil is increasing. In addition to meeting the repair standards, the requirements for repair cycle, repair cost, and effect durability are also getting higher and higher. Usually, remediation devices are used to artificially remediate contaminated soil or phytoremediation technology is used to carry out ecological remediation of heavy metal-contaminated soil. In the prior art, soil remediation using remediation devices usually requires the soil to be transferred to the remediation device to...

AI Technical Summary

Problems solved by technology

Usually, remediation devices are used to artificially remediate contaminated soil or phytoremediation technology is used to carry out ecological remediation of heavy metal-contaminated soil. In the prior art, soil remediation using remediation devices usually requires the soil to be transferred to the remediation device to separate the heavy metal components. , to achieve soil remediation, but the process is more complicated, and the effect is low in durability; phytoremediation technology is to plant corresponding plants in the heavy metal-contaminated soil in the corresponding area to repair it. Phytoremediation technology is an ecological, environmentally friendly and effective Technology is widely used because of its low cost, but it is mainly used in farmland restoration and mine ecological restoration due to its long restoration period. With the vigorous advancement of modern ecological city construction, more polluted sites need to be built into Green areas, parks and other green areas also have high requirements for landscape effects, and the restoration of urban polluted sites often needs to be completed efficiently and quickly, so the existing phytoremediation technology cannot meet the restoration needs of urban polluted sites and shorten the repair cycle , Improving repair efficiency becomes crucial

Images