关键词: 污染土壤, 机械化学法, 毒理研究, 生态风险评价

Abstract: In order to evaluate the risk of crop growth and ecological health after the remediation of organic contaminated soil by ball milling mechanochemical method, the effects of remediated soil, polluted soil and pollution-free soil on the growth of crops were compared by planting rice, soybean. The results showed that the growth period of rice in polluted soil was longer than that of rice in remediated soil, and the growth period of rice in remediated soil was similar to that in non-polluted soil. Comparing the growth status of crop fruits, it was found that the growth status of fruit in non-polluted soil was better than remediated soil, both were better than polluted soil fruits; The size of soybean fruits in non-polluted soil was the same, and there were great difference among the polluted soil soybean fruits. The toxicity of rice fruits grown in non-polluted soil, remediated soil and polluted soil were non-toxic, toxic and high toxic respectively. 41 kinds of volatile and semi-volatile pollutants were detected in remediated soil, mainly 2,4-dichlorophenol and polycyclic aromatic hydrocarbons. The non-carcinogenic risk of 2,4-dichlorophenol and phenol in remediated soil was lower than acceptable. The carcinogenic risk of benzo （b） fluoranthene was also lower than the acceptable risk level. It can be seen from this, the toxicity of soil remediated by ball milling mechanochemical method is reduced, and the carcinogenic and non-carcinogenic risk is reduced.

Key words: polluted soil, mechanochemical method, toxicological studies, ecological risk assessment