Occurrence Distribution and Ecological Risk of 1 Bisphenol Analogues in The Surface Water from A 2 Water Diversion Project in Nanjing China 3
Because of the widespread use of bisphenol analogues (BPs) as the alternatives to 17 bisphenol A (BPA) they have attracted considerable attention for health risk in aquatic ecosystems. 18 The occurrence and distribution of six BPs were researched in soluble phase 5 kDa) colloidal 19 phase (5 kDa to 1 mm) and suspended particulate matter (SPM 1 mm) in a water diversion project 20 of Nanjing, China. Except for bisphenol Z, all BPs were detected in the two or three phases, the total 21 concentrations of detected BPs were 161 613 ng/L, 5.19 77.2 ng/L and 47.5 353 ng/g for the soluble 22 phase, colloidal phase and SPM, respectively. Among the detected compounds, BPA still the 23 dominant BPs in the soluble and colloidal phases, followed by BPS, while BPAF was the major 24 contaminant in SPM, followed by BPA. The mean contribution proportions of colloids were 1 2 25 orders of magnitude higher than SPM, suggesting that colloids have an obvious impact on 26 regulating BPs' environmental behaviors. In terms of spatial distribution, although the water 27 diversion project could reduce the pollution levels of BPs, which might further affect the ecological 28 security of the Yangtze River. 29