Phytoremediation of contaminated soil with PCOPs

Remedy contaminated soil with PCOPs (HCB、pp'-DDT and γ-BHC) were studied by the method of phytoremediation. Results showed that planting ryegrass and garlic could reduce the content of PCOPs in soil and the decrease rate was high in 0~60d. The capability of phytoremediation were affected by plant species, growth period and degree of soil pollution. Ryegrass had a higher capability of absorbing PCOPs than garlic. During the early and middle stages of growth (0~60d), plants had absorbed more PCOPs. Plants' capability of absorption was high in contaminated soil with PCOPs of high content. Soil catalase activity, pH and content of organic matter reflected the changes on livingness of the soil organism. Planting could promote the capability of absorption and using PCOPs by the organism in soil. 1.11~10.25 percent of decreased PCOPs in contaminated soil were absorbed by plants, others might be degraded by plants and microorganism in soil environment after planting.