疏浚底泥生态毒理性风险分析方法的研究进展

疏浚底泥土地利用应该尽可能避免对施用土壤、周围地表水及地下水的污染,通过生物聚积试验和急性、亚急性毒性试验考查底泥对水及土壤中生物、植物发芽生长的影响,通过渗滤试验评价其对地下水层的污染。疏浚底泥土地利用前,其生态毒理性风险分析的方法包括风险简化评价和风险详细评价。通常简化评价方法用于估计底泥土地利用对生态系统影响程度;详细评价法进一步通过生物毒性试验和柱状渗滤试验来确定其生态毒理性影响,界定其风险特性。

Ecotoxicity Assessment of Contaminated Dredged Materials in Land Use

Dredged materials should be analyzed,and their potential effects on the ecosystem should be estimated by making an ecotoxicological risk assessment before land application.The effects on aquatic organisms and plant germination growth are considered through the bioaccumulation test and acute sub-acute toxicity tests,and groundwater contamination is estimated through(percolation) test.The general procedure includes two steps: a simplified risk assessment and a detailed risk assessment.The simplified risk assessment,based on the physico-chemical characteristics,is used to estimate the potential effects on(ecosystem,)and the detailed risk assessment can be employed to make these effects clear and define precisely the risk(characteristics).