摘要
对天津市大黄堡湿地自然保护区内的水、底泥及生物样品的不同组织中的全氟化合物(PFCs)的污染水平进行了研究,分析了PFCs在水-底泥的分配系数,生物积累因子以及生物体内不同组织间的分配系数.水相中的PFCs以全氟辛烷羧酸(PFOA)为主,浓度范围为24.8—48.2 ng.L-1,其次为全氟辛烷磺酸(PFOS),浓度范围为4.05—15.9 ng.L-1.底泥中的PFCs含量较低,PFOA和PFOS是主要的PFCs,浓度分别为<0.10—2.1 ng.g-1dw和0.54—1.10 ng.g-1dw.生物体内的PFCs主要以PFOS为主,乌鱼内脏的PFOS浓度高达82.6 ng.g-1ww,而肌肉部分也达49.0 ng.g-1ww;长链全氟烷基羧酸(PFCAs)的浓度也普遍较高;PFOA的浓度相对较低,在乌鱼内脏和肌肉中的含量分别为1.28和0.61 ng.g-1ww.PFOS在水蛇肝脏部分高达46.6 ng.g-1ww.PFCs的水-底泥分配系数(KOC)在102.83—104.20之间,随着碳链增加1个CF2,PFCAs的lgKOC值增加了0.58 lg单位,而且PFOS的lgKOC值大于相同链长的PFCAs.PFCs的生物积累因子在101.26—103.76之间,表现出长链的PFCAs和PFOS较容易富集.PFCs在生物体内各组织之间的分配系数表明长链的PFCAs和PFOS更容易分配到动物的内脏中,尤其是肝脏.
Investigation was conducted on the concentration,bioaccumulation and tissue distribution of perfluorinated compounds（PFCs） in water,sediment and organisms from Dahuangpu Wetland Natural Conservation,Tianjin.The water-sediment distribution coefficient,bioaccumulation factor,and distribution ratio between different organs of the organism were analyzed.Perfluorooctanoic acid（PFOA） was the predominant PFC in aqueous phase,with a concentration range between 24.8—48.2 ng·L-1,followed by perfluorooctane sulfonate（PFOS） with a range of 4.05—15.9 ng·L-1.PFOS and PFOA were the major PFCs found in sediments with lower levels,ranging from0.10 to 2.1 ng·g^-1 and from 0.54 to 1.10 ng·g^-1,respectively.PFOS was the major PFC in organisms.The concentrations of PFOS in viscera and muscle of mullet were 82.6 and 49.0 ng·g^-1,respectively.Long-chain perfluoroalkyl alkyl carboxylic acids（PFCAs） were also detected at high levels,while PFOA was found at relatively low levels with concentrations of 1.28 and 0.61 ng·g^-1,respectively.PFOS was also the primary PFC in water snake with an average concentration of 46.6 ng·g^-1 in their livers.The K OC of PFCs ranges from 102.83 to 104.20.The lg K OC of PFCAs increased by 0.58 lg unit with each additional CF2 moiety,and the lg K OC of PFOS was higher than the corresponding carboxylic acid.The BAF of PFCs ranges between 101.26 and 103.76,and long-chain PFCAs and PFOS seemed to be absorbed by organism more easily.The tissue distribution of PFCs in organisms shows that long-PFCAs and PFOS tend to be accumulated in viscera,especially liver.
出处
《环境化学》
CAS
CSCD
北大核心
2011年第3期638-644,共7页
Environmental Chemistry
基金
国家自然科学基金项目(No.20877043)
科技部国际合作项目(No.2009DFA92390)资助
关键词
全氟化合物
水-底泥分布
生物积累
天津大黄堡
湿地自然保护区
相间分布
perfluorinated compounds（PFCs）
distribution between water and sediment
bioaccumulation
Dahuangpu Tianjin
wetland natural conservation
phase distribution
