Characteristics,sources,and risk assessment of perfluorinated compounds in agricultural water of typical rivers in suburban Beijing
Characteristics and spatial distribution of perfluorinated compounds(PFCs)pollution in agricultural water of suburban Beijing typical rivers were investigated in 30 water samples collected from the agricultural water of Liangshui River in Tongzhou District and Ciwei River-Xiaoqing River in Fangshan District.The species and concentration of PFCs in water were determined and studied using ultra-high performance liquid chromatography-tandem mass spectrometry,and occurrence characteristics and possible sources of PFCs were analyzed.Finally,an ecological risk assessment was performed.More PFCs were detected at low levels in the agricultural water environment of typical rivers in suburban Beijing.Eleven types of PFCs were detected in Liangshui River.The total PFC concentration range was 0-62.7 ng·L-1,and the main PFCs were perfluorobutanoic acid,perfluorohexanoic acid,and perfluorooctanoic acid.Twenty one PFCs were detected in Ciwei River-Xiaoqing River.The total PFC concentration range was 0-93.1 ng·L-1,and the main PFCs were perfluoropentanoic acid,perfluoroundecanoic acid,and perfluorododecanesulfonate.The results revealed great upstream pollution of PFCs from agricultural water in typical rivers of suburban Beijing.Pollution originated mainly from sewage treatment plant effluent discharge and surface runoff.The ecological risk assessment showed that the concentrations of PFCs in water bodies did not reach levels that are harmful to the ecological environment.
万方数据
维普
