摘要
本研究以24种全氟化合物(polyfluoroalkyl substances,PFASs)为研究对象,于冬、夏两季采集了太浦河流域重要点位的水样以及沉积物,并采用固相萃取、液液萃取联合高效液相色谱-串联质谱(HPLC/MS-MS)的方法,探讨PFASs在太浦河流域水环境中的时空分布特征以及分配行为.结果显示,水体中PFASs的总质量浓度范围在114.24—168.62 ng·L^(-1),主要的污染物为全氟丁酸(PFBA)和全氟辛酸(PFOA),平均浓度为24.92 ng·L^(-1)和28.18 ng·L^(-1);沉积物中ΣPFASs在2.36—4.73 ng·g^(-1)(dw,干重),主要的污染物为全氟十一酸(PFUdA)和全氟十二酸(PFDoA),平均浓度为0.78 ng·g^(-1)(dw)和0.52 ng·g^(-1)(dw).水样的监测结果显示,各点位PFASs总浓度波动不大,仅在个别点位出现PFASs突增的情况.PFASs在太浦河流段没有明显的季节性差异,这与今年夏季降雨量少的情况有关.PFASs在沉积物-水的分配行为表明,PFASs在沉积物-水的分配系数与总有机碳(total organic carbon,TOC)的含量、PFASs碳链长度以及PFASs官能团结构有关.短链PFASs主要存在于水体中,长链PFASs则主要分布在沉积物中;全氟磺酸类(PFSAs)较全氟羧酸类(PFCAs)更易吸附在沉积物中.对PFASs来源解析发现:水体中PFASs的来源包括了外源输入和点源排放,夏季河体内PFASs主要受到大气远距离传输影响,冬季则与河道周围的工业活动有关.
In this study,the spatial and temporal distribution characteristics and distribution behavior of 24 kinds of perfluoroalkyl substances(PFASs)in the water environment of the Taipu River Basin were explored.Water samples and sediments from important points in the Taipu River Basin were collected in winter and summer.Solid-phase extraction,liquid-liquid extraction and high-performance liquid chromatography tandem mass spectrometry(HPLC/MS-MS)were employed to analyzed the target compounds.The results showed that the total mass concentration of PFASs in water ranged from 114.24 ng·L^(-1)to 168.62 ng·L^(-1).The dominant pollutants were perfluorobutyric acid(PFBA)and perfluorooctanoic acid(PFOA),with average concentrations of 24.92 ng·L^(-1)and 28.18 ng·L^(-1);In the sediment,PFASs ranged from 2.36 ng·g^(-1)(dw)to 4.73 ng·g^(-1)(dw).The dominant pollutants were perfluorodecanoic acid(PFUdA)and perfluoro dodecanoic acid(PFDoA),with average concentrations of 0.78 ng·g^(-1)(dw)and 0.52 ng·g^(-1)(dw).The results of water samples showed that the total concentration of PFASs does not fluctuate much among most points,only a sudden increase occurred at individual points.There was no obvious seasonal difference in PFASs in the Taipu River section,which is related to the low rainfall in this summer.The distribution behavior of PFASs in sediment water showed that the distribution coefficient of PFASs in sediment water is related to the content of total organic carbon(TOC)of the sediment,the carbon chain length of PFASs and the functional group structure of PFASs.Short chain PFASs mainly exists in water,while long chain PFASs mainly in sediments;Compared to perfluorocarboxylic acids(PFCAs),perfluorosulfonic acids(PFSAs)are more easily adsorbed to sediments.The analysis of the source of PFASs shows that the source of PFASs in the water body includes external input and point source discharge.In summer,PFASs in the river is mainly affected by long-distance atmospheric transmission,and in winter,it is related to industrial activities around the river.
作者
张红霞
张洪昌
胡双庆
沈根祥
李贞金
周萌萌
ZHANG Hongxia;ZHANG Hongchang;HU Shuangqing;SHEN Genxiang;LI Zhenjin;ZHOU Mengmeng(School of Resources and Environmental Engineering,East China University of Science and Technology,Shanghai,200237,China;State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants,Shanghai Academy of Environmental Sciences,Shanghai,200233,China)
出处
《环境化学》
CAS
CSCD
北大核心
2024年第3期722-733,共12页
Environmental Chemistry
基金
上海市“科技创新行动计划”社会发展科技攻关项目(21DZ1202102)资助。
关键词
全氟化合物
太浦河
时空分布
分配系数
来源解析
perfluorocarbons
Taipu River
spatial and temporal distribution
distribution coefficient
source resolution
作者简介
通信联系人:沈根祥,E-mail:shengx@saes.sh.cn。
