标题：OCCURRENCE CHARACTERISTICSOF BPA AND STEROID ESTROGENS IN WATER AND SEDIMENT AND THEIR RELATIONSHIP WITH WATER QUALITYOF ERHAI LAKE,A TYPICAL PLATEAU LAKE IN CHINA
摘要：In this research,water and sediment of ErhaiLake were studied to reveal occurrence characteris-tics and evaluate ecological risk of BPA and steroidestrogens.The detected concentrations of BPA,E2,E1,E23,EE2andE3inlake water were 4.02~10.51ng/L,0.73-24.53ngL2.40-6.52ng/L,9.17~20.65ng/L,7.83~26.63ng/Land 0.85~57.44ng/L during the dry season,respectively,while the EEQs ranged 25.94~74.84ng/L.Comparedwith dry season,under the influence of initial rain,the EEQs increased by 57%.PNEC-based ecologicalrisk assessment results showed that except BPA wasat moderate risk,steroid EDCs were almost at highrisk whether in dry or rainy season.EDCs content insediments rangeswere3.66~59.33ug/kg, nd~17.65ug/kg.22.21~ 181.40" Kgs.for BPA.kg,nd~26.33ug/kg and nd~12.28ug/kg for BPA, E2α,E1,E23,EE2 and E3,respectively.The highestconcentration section was located near the outlet ofthe Erhai Lake as the result of the deep lake waterand the long process of EDCs deposition.By com-paring the distribution characteristics of EDCs withCOD,nitrogen and phosphorus,we found that E2α.,E23,E3 and EE2 were closely related to soluble totalnitrogen,probably mainly from agricultural non-point source pollution during dry season.However,in rainy season,EDCs in Erhai Lake were more af-fected by runoff.
