title: Temporal-spatial distributions and ecological risks of perfluoroalkyl acids (PFAAs) in the surface water from the fifth-largest freshwater lake in China (Lake Chaohu).
abstract: To investigate the residues, compositions, distributions and potential ecological risks of perfluoroalkyl acids (PFAAs), water samples were collected seasonally between August 2011 and November 2012 from 20 sites in Lake Chaohu and its tributary rivers. The mean concentration of total PFAAs (TPFAAs) was 14.46 ± 6.84 ng/L. PFOA was the predominant contaminant (8.62 ± 4.40 ng/L), followed by PFBA (2.04 ± 1.16 ng/L) and PFHxA (1.23 ± 1.50 ng/L). The TPFAAs concentrations peaked in August 2012 in each area, except for the western river. The opposite spatial trends were found for PFOA and PFOS in both the lake and river areas. Except for PFOS and PFUdA, the levels of TPFAAs and PFAAs were significantly related to the composition of fluorescent dissolved organic matter (FDOM) but not related to total DOM expressed by dissolved organic carbon (DOC). The risk of PFOS determined by a species sensitivity distribution model was notably above that of PFOA.
authors: MOE Laboratory for Earth Surface Processes, College of Urban & Environmental Sciences, Peking University, Beijing 100871, China.
authors: Wen-Xiu
authors: WX
authors: Liu
authors: MOE Laboratory for Earth Surface Processes, College of Urban & Environmental Sciences, Peking University, Beijing 100871, China.
authors: Wei
authors: W
authors: He
authors: MOE Laboratory for Earth Surface Processes, College of Urban & Environmental Sciences, Peking University, Beijing 100871, China.
authors: Ning
authors: N
authors: Qin
authors: MOE Laboratory for Earth Surface Processes, College of Urban & Environmental Sciences, Peking University, Beijing 100871, China.
authors: Xiang-Zhen
authors: XZ
authors: Kong
authors: MOE Laboratory for Earth Surface Processes, College of Urban & Environmental Sciences, Peking University, Beijing 100871, China.
authors: Qi-Shuang
authors: QS
authors: He
authors: MOE Laboratory for Earth Surface Processes, College of Urban & Environmental Sciences, Peking University, Beijing 100871, China.
authors: Bin
authors: B
authors: Yang
authors: MOE Laboratory for Earth Surface Processes, College of Urban & Environmental Sciences, Peking University, Beijing 100871, China.
authors: Chen
authors: C
authors: Yang
authors: Section of Toxicology and Environmental Chemistry, Institute A, University of Copenhagen, University Park 2, DK-2100 Copenhagen Ø, Denmark.
authors: Sven Erik
authors: SE
authors: Jorgensen
authors: MOE Laboratory for Earth Surface Processes, College of Urban & Environmental Sciences, Peking University, Beijing 100871, China. Electronic address: xufl@urban.pku.edu.cn.
authors: Fu-Liu
authors: FL
authors: Xu
mesh_terms: D002681:China; D004784:Environmental Monitoring; D005466:Fluorocarbons / Q000032:analysis*; D060106:Lakes / Q000737:chemistry*; D062211:Spatio-Temporal Analysis; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D005466:Fluorocarbons; D014874:Water Pollutants, Chemical
keywords: Ecological risks; Fluorescent dissolved organic matter; Lake Chaohu; Perfluoroalkyl acids; Residual levels; Species sensitivity distribution model; Temporal-spatial distributions