Method for restoring soil heavy metal cadmium pollution by use of herba cichorii
A technology for remediating soil and heavy metals, which is applied in the field of phytoremediation of heavy metal-contaminated soils. It can solve problems such as the small amount of heavy metals absorbed and accumulated, the overall effect of practical application is not large, and it does not have good economic benefits. It achieves strong drought resistance and management Low cost and strong adaptability
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[0023] Example 1 Soil remediation test in polluted mining area
[0024] The test site was a farmland contaminated by heavy metals in the Chenzhou mining area, Hunan. The concentration of heavy metal cadmium in the soil of this farmland was 1.44mg / kg, of which the effective cadmium content was 0.73mg / kg.
[0025] The specific method is as follows: plant chicory in the field in the above-mentioned heavy metal compound pollution area, choose the soil suitable for deep loose soil, carry out conventional arable land and fertilize, and broadcast the chicory directly in the contaminated soil. Pest management and field moisture management, and timely topdressing.
[0026] The test soil was collected from heavy metal polluted farmland in Chenzhou mining area, and there was no water in the field. The sampling depth is 0~30cm. Multi-point sampling is adopted, and the mixed soil sample is composed of more than 3 distributed point samples n. After the soil sample is retrieved, crush the soil b...
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