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Technical method for remedying cadmium-lead contaminated soil by animal-plant collaboration

A lead-contaminated soil and collaborative restoration technology, applied in the field of heavy metal-contaminated soil, can solve the problems of adverse effects on soil structure, soil body damage, and difficulty in regulation, and achieve the effect of low cost, strong pertinence, and convenient operation

Active Publication Date: 2014-08-06
江苏京牧生物技术有限公司
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AI Technical Summary

Problems solved by technology

The defects of single remediation technology are obvious. For example, although chemical remediation is fast and has a wide application area, it is expensive and difficult to control in practical applications; microbial remediation is relatively economical and will not cause secondary pollution to the soil, but it is easy to damage the soil structure. produce adverse effects, leading to damage to soil organisms

Method used

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Experimental program
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Effect test

Embodiment

[0030] The experiment was carried out at the experimental site of Changzhou University. The contaminated soil of the experiment was taken from a chemical polluted site next to Zhongwu Avenue in Changzhou City. The size of the collaborative remediation bed was 2m×1m×0.6m, and the bottom of the collaborative remediation bed was treated with anti-seepage , by laying anti-seepage film, the anti-seepage film adopts 1.5 mm thick plastic film, further, in order to prevent the anti-seepage film from being damaged, fine sand is laid on the lower soil layer of the anti-seepage film and the upper surface of the anti-seepage film as a protective layer.

[0031] Divide the synergetic repair bed into four different areas with glass, put Eisenia chinensis in two areas, and Dura worm in the other two areas. After 30 days, the cadmium and lead content in the two kinds of earthworms were analyzed experimentally, and the cadmium, Eisenia chinensis, which has the largest lead overabsorption and ac...

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Abstract

The invention relates to a technical method for remedying cadmium-lead contaminated soil by animal-plant collaboration. The technical method comprises the following steps: digging a collaborative remediation bed of 5-10 m in side length and 0.5-0.7 m in depth near a governance target area; stripping contaminated soil to fill on the collaborative remediation bed; dividing the collaborative remediation bed into different areas; breeding earthworms in different categories in each area; analyzing the cadmium-lead contents in the earthworms in different categories in experiment after 30-45 days; screening the earthworm varieties with excess absorption and maximum accumulation of cadmium-lead; planting plants in different categories in the different areas of the collaborative remediation bed; reaping the plants during the harvest time; analyzing the cadmium-lead contents in stalk parts and leaf parts of the plants in experiment; screening the plant species with excess absorption and maximum accumulation of cadmium-lead; watering the collaborative remediation bed periodically to maintain the normal growth and propagation of animals and plants on the collaborative remediation bed. According to the invention, remediation and governance of the cadmium-lead contaminated soil are realized by the harvesting and reaping of the animals and the plants.

Description

technical field [0001] The invention relates to the technical field of treatment of heavy metal-contaminated soil, in particular to a technical method for animal and plant collaborative restoration of cadmium- and lead-contaminated soil. Background technique [0002] With the development of my country's industrialization and urbanization and the implementation of the "Stockholm International Convention", a large number of chemical companies have relocated or are about to be decommissioned. These factors have caused quite serious site pollution. Some sites were relocated without any risk assessment and environmental treatment, and the original site land will be gradually adjusted to residential land, public facilities construction land, and green land. At the same time of conversion and secondary development, cadmium and lead polluted soil has become a "chemical time bomb", which seriously threatens human health and ecological security. [0003] At present, there are many meth...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/10
Inventor 万玉山黄利陈艳秋王晓敏李定龙杨彦
Owner 江苏京牧生物技术有限公司
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