METHOD FOR REMEDIATING SOIL POLLUTED WITH CADMIUM-POLYCHLORINATED BIPHENYL COMPOUNDS

摘要

Disclosed is a method for remediating soil polluted with cadmium-polychlorinated biphenyl compounds, comprising: soaking Tagetes patula seeds with 10% hydrogen peroxide for 10 min and then rinsing with distilled water, and spot-sowing in a seedling raising pot; transplanting into soil polluted with cadmium-polychlorinated biphenyl compounds after the Tagetes patula young seedlings grow to 5-8 cm, putting in a greenhouse for cultivation, and applying an appropriate amount of water, so that the soil water content is kept at 60-80% of the field capacity; and removing the whole plants from the polluted soil and handling properly after the Tagetes patula grows to be mature, then planting the Tagetes patula in the soil polluted with cadmium-polychlorinated biphenyl compounds for the second time, and repeating the above operations until the content of cadmium in the soil reaches environmental safety standards. The present invention has the advantages of: Tagetes patula has strong adaptability and can be propagated by means of sowing or cutting, is easy to cultivation and manage and is resistant to drought and cold; Tagetes patula has better tolerance and cadmium accumulation capability in soil polluted with cadmium-polychlorinated biphenyl combined, and can effectively and rapidly remediate polluted soil, improve soil structure and beautify the environment.