持久性有机污染土壤的植物修复及其机理研究进展

Research advances in phytoremediation and its mechanisms of POPs-contaminated soils

随着人类对化学品的依赖程度越来越高,环境的有机污染状况也越来越严重。有机污染土壤的植物修复是指利用植物在生长过程中,吸收、降解、钝化有机污染物的一种原位处理污染土壤的方法,具有应用成本低、生态风险小、对环境副作用小等特点。本文综述了近年来国内外有机污染土壤的植物修复研究进展情况,重点介绍了多氯联苯、多环芳烃、农药和硝基芳香化合物等持久性有机污染物的植物修复,阐述了有机污染土壤植物修复的关键机制,并分析了该技术在实际工程应用中的局限性及应考虑的因素。最后,指出了今后该领域的重点研究方向。

There is an increasing organic pollution in the environment, because human being is more and more relying on chemicals. Phytoremediation of organic pollutants-contaminated soils is an on-site remediation technology based on the plant absorption, degradation, and passivation of organic pollutants, and characterized by low-cost, low-risk, and low side-effect to the environment. In this paper, some recent research advances in phytoremediation of organic pollutantscontaminated soils both at home and abroad were summarized, with the focus on the phytoremediation of PCBs, PAHs, pesticides, and nitryl-aromatic compounds. The key mechanisms of phytoremediation for soils contaminated by organic pollutants were expounded, and the limitations of this technology as well as the affecting factors that should be considered in an actual project were analyzed. Future directions of this research field were pointed out.