太湖梅梁湾全氟化合物污染现状研究

采用超高效液相色谱-三重四极杆串联质谱/质谱法研究了太湖梅梁湾表层水中全氟化合物(Perfluorinated Compounds,PFCs)的污染水平及空间分布特征.结果表明,梅梁湾表层水中总PFCs浓度范围为50.06～87.53ng·L-1,均值为66.57ng·L-1.PFHxA、PFOA和PFOS是太湖梅梁湾最主要的PFCs,其浓度范围分别为17.34～32.52ng·L-1、7.26～15.57ng·L-1和3.47～8.06ng·L-1.PFHxA、PFOA和PFOS占总PFCs含量的59.33%;梅梁湾表层水中总PFCs含量的空间分布特征总体上呈现东部高于西部的趋势,这可能是由梅梁湾的水动力条件和污染源分布不同所致.

A study on the perfluorinated compounds pollution in Meiliang Bay, Taihu Lake

The pollution level and spatial distribution of perfluorinated compounds (PFCs) in surface water samples collected from Meiliang Bay of Taihu Lake were studied by using Ultra performance liquid chromatography coupled with triple quadrupole Tandem Mass Spectrometry (UPLC-MS/MS). The total PFCs concentrations in surface water from Meiliang Bay ranged from 50.06 ng·L^-1 to 87.53 ng·L^-1 with an average of 66.57 ng·L^-1. Perfluorohexanoic acid (PFHxA), perfluorooctanoic acid (PFOA), and perfluorooctane sulfonate (PFOS) were the major PFCs in the Meiliang Bay, Taihu Lake, with ranges of 17.34 ~32.52 ng·L^-1, 7.26 ~15.57 ng·L^-1, and 3.47~8.06 ng·L^-1, respectively. These three PFCs accounted for 59.33% of the total amount of PFCs. Higher total PFC concentration was found in the east part than the west part of Meiliang Bay. This might be due to the different PFC sources and hydrodynamics of Meilaing Bay.