Contamination And Risk Assessment Of Phenolic Endocrine Disrupting Chemicals In Water Body, Sediment And Aquatic Organisms From The Pearl River Estuary

At present,the contamination status of endocrine disrupting chemicals has attracted worldwide attention.The present study determined 4-NP,4-t-OP and BPA in water body(overlying water,sediment)and biota(fish,shrimp and mollusk)collected along the Pearl River Estuary(Humen outlet,Jiaomen outlet,Modaomen outlet and Yamen outlet).Meanwhile,the migration of 4-NP and BPA between overlying water,sediment and organisms were calculated.Besides,the potential risk posed by phenolic endocrine disrupting chemicals were assessed.The main conclusions are as follows:(1)The concentrations of 4-NP,4-t-OP and BPA in overlying water were 233.04-3352.86 ng/L,1.20-3.99 ng/L and 12.41-62.78 ng/L,respectively;in sediment were 7.55-20.80 ng/g dw,<0.17 ng/g dw and 2.31-13.16 ng/g dw,respectively;in biota were 17.48-237.12 ng/g dw,<0.11-0.61 ng/g dw and 0.19-4.36 ng/g dw.The contamination of NP in overlying water,sediment and aquatic organisms were obvious.(2)The distribution coefficient of 4-NP and BPA between overlying water and sediment were 41-1032.11 L/kg and 6.2-32.42 L/kg,respectively;the bioconcentration factors(BCF)of 4-NP and BAP from overlying water to organisms were 10.88-338.31 L/kg and 13.10-147.71 L/kg,respectively;the biota-sediment accumulation factors(BSAF)of 4-NP and BPA were 1.63-30.19 and 0.02-1.88,respectively.The markedly migration of NP between water body and aquatic organisms were observed.(3)The total risk quotient(RQ)of 4-NP,4-t-OP and BPA in overlying water were 2.19-30.55,reaching a higher level;in sediment were 0.7-1.78,in which the vaule of RQ in Humen outlet and Jiaomen outlet were both exceed 1.The total hazard quotient(HQ)of the compound pollution of 4-NP,4-t-OP and BPA were all below 1,indicating no serious harm to the health of human aquatic food.