Ecological Risk Assessment of Pesticide Residues Chronic Impacts in Taihu Lake
Taihu Lake is an important ecosystem in east China, and also an ecologically vulnerable region. Pesticide residues can be detected in Taihu Lake. Although the environmental concentrations are not high enough to harm the ecosystem acutely, the residues can pose potential risk to the ecosystem and human health because of their chronic impacts. It is necessary to assess the ecological risk induced by pesticide residues chronic impacts. Based on the integration of risk quotient method and probabilistic risk assessment method, this paper proposes a methodology of ecological risk assessment of pesticide residues chronic impacts. It indicates that dichlorvos posed quite high chronic risk to the ecosystem, while risks posed by other pesticides are acceptable. Whereas combined ecological risk posed by the mixture is 24.08% in average, which exceeds the acceptable 5% level. Temporal variations of each pesticides contribution to the total ecological risk are also presented. This analysis shows that risk alleviation actions should be made taking account of the pesticide residues chronic impacts in Taihu Lake.
Changsheng Qu Jun Bi Lei Huang Fengying Li Jie Yang
State Key Laboratory of Pollution Control and Resource Reuse School of the Environment, Nanjing University Nanjing 210093, China
国际会议
成都
英文
1-4
2010-06-18（万方平台首次上网日期，不代表论文的发表时间）