[Spatial Distribution and Source of Perfluorinated Compounds in Urban Soil from Part of Cities in Anhui Province, China].

In order to explore the spatial distribution and source of perfluorinated compounds (PFCs),eleven mixed urban soil samples were collected from 7 cities in Anhui Province in 2013.Fifteen individual PFCs were detected by ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS),and principal components analysis was used to trace the different sources of PFCs in urban soil.The results showed that the total concentration of PFCs (Σ) ranged from 1.15 to 5.98 ng·g dry weight (dw),with an average concentration of 2.69 ng·g.perfluorooctane sulfonate (PFOS) with a concentration range of n.d.-3.56 ng·g and an average concentration of 0.96 ng·g was the dominant PFC contaminant,followed by perfluorooctane acid (PFOA) with a concentration range of n.d.-2.89 ng·g and an average concentration of 0.64 ng·g.The highest Σ concentration in all selected mixed urban soil samples was from Chuzhou City with the value of 5.89 ng·g,followed by Jingxian County of Xuancheng City (4.04 ng·g).Interestingly,the PFOS concentration was as high as 3.56 ng·g in Jingxian County,accounting for 88.1% of the total PFCs concentration,which might be influenced by paper industry in this area.Comparing to other soil samples in China,Σ concentration of urban soil from Anhui Province was at middle level.Over 60% of Σ in urban soil of Anhui province could be attributed to the four principal components,represented by PFOA,perfluorobutane sulfonate,perfluorododecanoic acid,perfluorobutane acid and PFOS.