应用物种敏感性分布法分析太湖及天目湖水体的生态风险

采用物种敏感性分布法(SSDs法),应用水生生物急性和慢性毒性数据计算了31种污染物在水中和其中疏水物质在沉积物中的预测无效应浓度(PNECwater和PNECsed),通过收集以往报道的16种污染物在太湖和天目湖的环境浓度,用商值法求得物质的风险商并进行排序.结果发现:蒽、菲、萘、荧蒽、阿特拉津和马拉硫磷在太湖的梅梁湾和五里湖具有很大的生态风险;毒死蜱、三丁基锡氧化物和环己锡虽无环境浓度报道但很有可能具有风险.

Ecological risk assessment of water in Taihu Lake and Tianmu Lake using species sensitivity distribution model

Ecological risk assessment on the pollutants in lakes can enable appropriate monitoring and management work,which is important for the protection and recovery of aquatic ecosystem,the prevention of algae bloom and lake degradation.Ecological risk assessment on the typical pollutants in Taihu Lake and Tianmu Lake was performed using species sensitivity distributions(SSDs).The predicted no-effect concentration for water and sediment(PNECater for all compounds,PNECsed for hydrophobical ones) for 31 compounds was derived from the acute and chronic toxicity data of aquatic organisms.Environment concentrations of 16 pollutants were collected from published documents.Then the risk ratios(PEC/PNEC ratio) of these 16 pollutants were calculated and arranged.Among the 16 pollutants,anthracene,phenanthrene,naphthalene,fluoranthene,atrazine and malathion are likely to pose ecological risk to the environment of Liangmei Bay and Tianmu Lake in Taihu Lake,and Wuli Lake.Moreover,chlorpyrifos,tributyltin oxide and tricyclohexylhydroxytin have great potential of causing ecological risk,though no concentration data were reported.