鄱阳湖表层水中全氟辛酸和全氟辛烷磺酸污染现状调查

INVESTIGATION OF PERFLUOROOCTANOIC ACID(PFOA) AND PERFLUOROOCTANE SULFONATE(PFOS) POLLUTION IN SURFACE WATER OF POYANG LAKE

为阐明鄱阳湖表层水中全氟辛酸(PFOA)和全氟辛烷磺酸(PFOS)的污染现状,于2011年4月7～9日采集鄱阳湖的表层水样30份和长江水样2份,采用超高效液相色谱-三重四极杆串联质谱/质谱法检测样品中PFOS和PFOA含量,探索鄱阳湖表层水中PFOS和PFOA的污染水平及空间分布特征。结果表明:PFOS和PFOA的浓度范围分别为未检出～0.71ng/L和0.30～1.89ng/L,均值分别为0.35ng/L和1.10ng/L。而位于长江的0号点水中PFOA和PFOS含量分别为15.11ng/L和0.81ng/L。鄱阳湖表层水中的PFOS和PFOA在整体上都呈现南部高于北部的趋势,这可能是由鄱阳湖的水动力条件和其周边PFCs污染源分布不同所致。以上研究结果显示,鄱阳湖表层水中PFOS和PFOA处于较低的污染水平。

In order to clarify the pollution status of perfluorooctanoic acid（PFOA） and perfluorooctane sulfonate（PFOS） in surface water of Poyang Lake,30 water samples in the Poyang Lake and 2 water samples in the Yangtze River were collected from April 7th to April 9th in 2011.The PFOS and PFOA concentrations were detected by using Ultra performance liquid chromatography coupled to triple quadrupole Tandem Mass Spectrometry（UPLC-MS/MS）.The aims of the present study are to examine the pollution level and spatial variation of PFOA and PFOS in surface water samples collected from the Poyang Lake.The ranges of PFOS and PFOA concentrations in surface water of the Poyang Lake were from undetectable to 0.71 ng/L and from 0.30 ng/L to 1.89 ng/L,respectively,with the average of 0.35 ng/L and 1.10 ng/L,respectively.The PFOA and PFOS concentrations in surface water of the Yangtze River（site 0） were 15.11 ng/L and 0.81 ng/L,respectively.The spatial variation of the total PFCs showed the higher concentration in the south part than in the north part of the Poyang Lake.This might be due to the different PFCs sources and hydrodynamics of the Poyang Lake.The above results demonstrate that the pollution levels of PFOS and PFOA in the Poyang Lake are still low.