Use of lipid biomarkers for identification of regional sources and dechlorination characteristics of polychlorinated biphenyls in the East China Sea.
Use of lipid biomarkers for identification of regional sources and dechlorination characteristics of polychlorinated biphenyls in the East China Sea.
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DOI：
10.1016/j.scitotenv.2014.05.054
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发表时间：
2014-08
期刊：
影响因子：
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通讯作者：
Ying Fan;J. Lan;Huijuan Li;Yali Cao;Zongshan Zhao;Jiaokai Wang;Meixun Zhao;Gui-duo Jiang
中科院分区：
文献类型：
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作者：
Ying Fan;J. Lan;Huijuan Li;Yali Cao;Zongshan Zhao;Jiaokai Wang;Meixun Zhao;Gui-duo Jiang
陆地有机质(TOM)指示物可以作为研究有机污染物环境行为的指标，因为它们随TOM一起被输送到陆架海中。为探讨东中国海区多氯联苯的区域来源，采用∑、C27+、C29+和C31n-烷烃的TOM指标以及支链指数和类异戊二烯四醚(BIT)进行了对比研究。结果表明，济州岛西南部泥质区、北纬29°以北沿海和北纬29°以南沿海地区沉积的多氯联苯主要来源于大气沉积、长江沿江输入和局部沿海大气沉积。多氯联苯脱氯、缺氧和∑和梯状脂类等非确定性指标的空间格局具有广泛的相似性，这表明深度脱氯主要发生在济州岛西南部的沿海地区和中央陆架。
Terrestrial organic matter (TOM) indicators could serve as proxies in studying the environmental behavior of organic pollutants because they are transported into the shelf seas along with the TOM. In this study, comparisons between polychlorinated biphenyls (PCBs) and TOM indicators of ∑ C27+ C29+ C31n-alkanes, as well as branched and isoprenoid tetraether (BIT) index, were performed to examine the regional sources of PCBs in the East China Sea. The results indicated that sedimentary PCBs in the mud area southwest of the Cheju Island, coastal area north of the 29°N, and coastal area south of the 29°N were mainly from atmospheric deposition, riverine input of the Yangtze River, and local coastal sources via atmospheric deposition, respectively. The broad resemblance of the spatial patterns of non-definitive indicators of PCB dechlorination, hypoxia, and ∑ ladderane lipids suggested that deep dechlorination mainly occurred at the coastal areas and center shelf southwest of Cheju Island.