北京水源地鱼体全氟化合物的暴露水平及其健康风险

发布时间：2018-01-24 13:57

本文关键词： 全氟化合物(PFASs) 鱼营养级暴露水平健康风险水源地　出处：《生态毒理学报》2017年01期 　论文类型：期刊论文

【摘要】：全氟化合物(PFASs)作为一类新型的有机污染物,因具有持久性、可长距离传输、生物蓄积性和生物毒性等POPs特性,近年来得到全世界的广泛关注。本文以北京市水源地(密云水库和官厅水库)为研究区域,采用固相萃取(SPE)前处理与高效液相色谱串联质谱联用(HPLC-MS/MS)相结合的方法,分析测定了鱼样品中包括全氟辛烷磺酸(PFOS)、全氟辛酸(PFOA)、全氟丁酸(PFBA)、全氟丁烷磺酸(PFBS)等在内的12种PFASs的含量。利用同位素法确定了不同种类鱼的营养级关系,研究不同营养级中的PFASs浓度及生物放大效应,重点对全氟辛烷磺酸(PFOS)与全氟辛酸(PFOA)的生态风险以及对人体的健康风险进行评价。结果表明:北京市水源地的鱼体中的PFASs存在不同程度的检出,其中,全氟辛烷磺酸(PFOS)、全氟辛酸(PFOA)、全氟壬酸(PFNA)、全氟癸酸(PFDA)、全氟十一酸(PFUdA)和全氟十二酸(PFDoA)的检出率均达到100%,PFASs总量浓度达1.70~14.32 ng·g~(-1) wet weight(w.w.),PFOS和长链全氟羧酸PFCAs是鱼体中的主要污染物。同位素鉴定水库鱼的营养级层次范围在2.11~4.10,且肉食性鱼类营养级大多高于杂食性鱼类,PFOS沿着食物链生物放大的过程与稳定碳氮同位素富集过程基本同步。此外,采用人均日摄入量法(average daily intake,ADI)评估得到PFOS与PFOA的风险值分别为1.16 ng·kg~(-1)·d~(-1)和0.31ng·kg~(-1)·d~(-1),整体低于人均每天可承受摄入量(tolerable daily intake,TDI),结果表明,北京水源地鱼体中PFOS和PFOA含量未达到对生态系统和人体健康具有风险的水平。
[Abstract]:As a new class of organic pollutants, perfluorinated compounds (PFASs) have POPs properties such as persistence, long distance transport, bioaccumulation and biotoxicity. In recent years, it has received worldwide wide attention. In this paper, the source of water in Beijing (Miyun Reservoir and Guanting Reservoir) as the study area. The determination of perfluorooctane sulfonate (PFOS) in fish samples was carried out by means of solid phase extraction (SPE) pretreatment and HPLC-MS / MS combined with HPLC / MS. Perfluorooctanoic acid (PFOAA). The contents of 12 PFASs including perfluorobutane sulfonic acid (PFBS) were determined by isotopic method. The effects of PFASs concentration and biomagnification in different nutrient levels were studied. Perfluorooctane sulfonic acid (PFOS) and perfluorooctanoic acid (PFOAA). The results showed that PFASs was detected in fish body of Beijing water source to varying degrees. Among them, perfluorooctane sulfonic acid (PFOSU), perfluorooctanoic acid (PFOAA), perfluorononic acid (PFNAA), perfluorodecanoic acid (PFDAA). The detectable rate of PFU dA) and PFDoA of perfluorinated undecanoic acid (PFU) and perfluorinated 12 acid (PFDoA) were both 100%. The total concentration of PFASs was 1.70 ~ 14.32 ng 路g ~ (-1) wet weight. PFOS and long-chain perfluorocarboxylic acid PFCAs are the main pollutants in fish body. The nutrient level of reservoir fish identified by isotopes is 2.11 ~ 4.10. In addition, the process of biomagnification along the food chain and the process of stable carbon and nitrogen isotopic enrichment were basically synchronized. Daily average intake was measured by daily intake per person. The risk values of PFOS and PFOA were 1.16 ng 路kg ~ (-1) 路d ~ (-1) and 0.31 ng 路kg ~ (-1) 路d ~ (-1) respectively. The whole was lower than the per capita tolerable daily daily in taking TDI, the results showed that. The contents of PFOS and PFOA in Beijing water source fish were not up to the level of risk to ecosystem and human health.
【作者单位】：西北大学城市与环境学院;中国科学院生态环境研究中心城市与区域生态国家重点实验室;中国科学院大学;北京林业大学;
【基金】：水体污染控制与治理科技重大专项(2015ZX07203-005) 国家自然科学基金项目(41571478)
【分类号】：X171.5;X52
【正文快照】： 1.西北大学城市与环境学院,西安7101272.中国科学院生态环境研究中心城市与区域生态国家重点实验室,北京1000853.中国科学院大学,北京1000494.北京林业大学,北京100083Occurrence and Human Health Risk of PFASs in Fishes from DrinkingWater Sources of BeijingLiu Sifan1,

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