School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, PR China; Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangzhou Key Laboratory Environmental Catalysis and Pollution Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou, 510006, PR China.
Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangzhou Key Laboratory Environmental Catalysis and Pollution Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou, 510006, PR China; Synergy Innovation Institute of GDUT, Shantou, 515041, PR China.
Environ Pollut. 2020 Dec;267:115497. doi: 10.1016/j.envpol.2020.115497. Epub 2020 Aug 27.
The study aimed to investigate temporal trends of "old" and "new" persistent halogenated organic pollutants (HOPs) in Taihu Lake, the third largest freshwater lake in China, and the associated health risks. Five fish species were consecutively collected from the lake every year during 2011-2018. HOPs including 37 polychlorinated biphenyls (PCBs), 10 organochlorine pesticides (OCPs), short- and medium-chain chlorinated paraffins (SCCPs and MCCPs), 19 polybrominated diphenyl ethers (PBDEs), and 10 new brominated flame retardants (NBFRs), were measured. The results showed that all the HOPs were detected, with MCCPs and NBFRs showing the highest and lowest concentrations, respectively. The levels of SCCPs and MCCPs were several orders of magnitude higher than those of the other HOPs. There were obvious increasing trends for SCCPs, MCCPs, and hexachlorobenzene, but a decreasing trend for PBDEs. No obvious increasing or decreasing trends were observed for the other HOPs. The present study indicated that the use of NBFRs to replace PBDEs was not yet clearly observed. Fish consumption did not result in non-carcinogenic risks, but posed low carcinogenic risks, with PCBs and DDTs being the highest-risk contaminants because of historical residues. This is the first study for the temporal variations of the HOPs in the lake.
本研究旨在调查中国第三大淡水湖太湖中“旧”和“新”持久性卤代有机污染物 (HOPs) 的时间变化趋势及其相关健康风险。2011-2018 年期间，每年连续从湖中采集 5 种鱼类。共检测到 37 种多氯联苯 (PCBs)、10 种有机氯农药 (OCPs)、短链和中链氯化石蜡 (SCCPs 和 MCCPs)、19 种多溴二苯醚 (PBDEs) 和 10 种新型溴化阻燃剂 (NBFRs)。结果表明，所有 HOPs 均被检出，其中 MCCPs 和 NBFRs 的浓度最高和最低。SCCPs 和 MCCPs 的水平比其他 HOPs 高出几个数量级。SCCPs、MCCPs 和六氯苯呈明显上升趋势，而 PBDEs 则呈下降趋势。其他 HOPs 则没有明显的上升或下降趋势。本研究表明，用 NBFRs 替代 PBDEs 的情况尚未得到明显观察。鱼类消费不会导致非致癌风险，但存在低致癌风险，其中 PCBs 和滴滴涕因历史残留而成为最高风险污染物。这是该湖 HOPs 时间变化的首次研究。
