Temporal and spatial changes in persistent organic pollutants in Vietnamese coastal waters detected from plastic resin pellets.
Temporal and spatial changes in persistent organic pollutants in Vietnamese coastal waters detected from plastic resin pellets.
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DOI：
10.1016/j.marpolbul.2016.05.063
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发表时间：
2016-08
影响因子：
5.8
通讯作者：
Dung Quang Le;H. Takada;Rei Yamashita;Kaoruko Mizukawa;J. Hosoda;Dao Thi Anh Tuyet
中科院分区：
文献类型：
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作者：
Dung Quang Le;H. Takada;Rei Yamashita;Kaoruko Mizukawa;J. Hosoda;Dao Thi Anh Tuyet
对2007年至2014年在越南明州岛和巴拉特河口收集的塑料树脂颗粒进行了二氯二苯基三氯乙烷（DDTs），多氯联苯（PCB）和六氯环己烷（HCHs）分析。这项研究是作为国际颗粒观察计划的一部分进行的，该计划旨在监测持久性有机污染物（POP）的全球分布。与多氯联苯相比，滴滴涕的含量较高，表明该区域的农业投入而不是工业排放。在此期间，除六氯环己烷异构体外，两个海滩上的大多数持久性有机污染物浓度都有所下降。尽管2007/2008年至2014年期间，这两个海滩的滴滴涕浓度急剧下降，但滴滴涕占滴滴涕总量的60-80%，这表明该地区仍有新的化学品输入。本研究强烈建议开展进一步调查，利用塑料树脂颗粒追踪海洋环境中持久性有机污染物水平的时间和空间模式。
Plastic resin pellets collected at Minh Chau island and Ba Lat estuary between 2007 and 2014 in Vietnam were analyzed for dichloro-diphenyl-trichloroethanes (DDTs), polychlorinated biphenyls (PCBs) and hexachlorocyclohexanes (HCHs). The study was carried out as part of the International Pellet Watch program for monitoring the global distribution of persistent organic pollutants (POPs). Higher levels of DDTs compared to PCBs indicated agricultural inputs rather than industrial discharges in the region. Most POP concentrations on both beaches decreased over the period, with the exception of HCH isomers. Though the concentration of DDTs showed a drastic decline on both beaches between 2007/2008 and 2014, DDTs accounted for 60–80% of total DDTs, suggesting that there is still a fresh input of these chemicals in the region. This study strongly recommends further investigations to track temporal and spatial patterns of POP levels in the marine environment using plastic resin pellets.