摘要
为探究东江流域土壤中全氟化合物（perfluorinated compounds,PFCs）分布特征和潜在来源,2013年8月采集东江流域19份表层土样品,利用高效液相色谱-串联质谱联用（HPLC-MS/MS）技术分析了16种PFCs的含量。结果表明,东江流域表层土总PFCs（∑PFCs）含量范围在2.15-5.49μg/kg dw。所采集的表层土样品中,东江东莞段土壤∑PFCs含量明显高于惠州段,全氟辛烷磺酸（0.65-1.28μg/kg dw）为最主要的污染物。与国内相关研究数据相比,东江流域土壤PFCs含量水平整体较高,这可能与流域产业结构和经济活动有关。主成分分析结果表明,电镀防雾剂、食品包装和全氟羧酸的生产过程、大气沉降、电化学氟化过程为东江流域土壤中PFCs的主要来源。与土壤有机质含量相关性研究表明,PFCs更容易分配到有机质含量高的土壤中,且随着PFCs分子碳链的增加,这种趋势更加显著。
In order to explore the spatial distribution and potential source of perfluorinated compounds（PFCs）,19 surface soil samples were collected around the Dongjiang River in August,2013.The levels of 16 individual PFCs were quantified by high performance liquid chromatography-tandem mass spectrometry（HPLC-MS/MS）.Results show that total concentrations of PFCs（∑PFCs）range from 2.15 to 5.49μg/kg dry weight（dw）.The∑PFCs concentrations in soils from Dongguan section are significantly higher than those of Huizhou section around the Dongjiang River.Perfluorooctane sulfonate（PFOS）whose concentration ranging from 0.65 to 1.28μg/kg dw is the dominant PFC contaminant.Compared with other regions in China,the∑PFCs concentrations in soils around the Dongjiang River are relatively high,which could be relative to industrial structure and economic activity.Additionally,principal component analysis（PCA）model was employed to quantitatively calculate the contribution of extracted sources.The manufacturing of electroplating antifoggants,food packing and perfluoroalky carboxylates,atmospheric deposition and electrochemical fluorination are the three main source categories for PFCs in soils around the Dongjiang River.Relevant research between PFCs concentrations and soil total organic carbon shows that PFCs are more easily distributed in the soil with higher organic matter content,which would be more significant with the increases of PFCs chains.
出处
《地球与环境》
CAS
CSCD
2015年第3期302-307,共6页
Earth and Environment
基金
国家自然科学基金项目(11275130)
吉林省教育厅"十二五"科学技术项目(吉教科合字[2014]第518号)
关键词
全氟化合物
东江
表层土
空间分布
来源解析
perfluorinated compound
the Dongjiang River
surface soil
spatial distribution
source appointment
