DDTs and HCHs in sediment cores from the coastal East China Sea

	DDTs and HCHs in sediment cores from the coastal East China Sea
	Tian Lin; Luca Nizzetto; Zhigang Guo; Yuanyuan Li; Jun Li; Gan Zhang
	2015
发表期刊	Science of The Total Environment
卷号	539 期号:2 页码:388-394
摘要	Four sediment cores were collected along the Yangtze-derived sediment transport pathway in the inner shelf of the East China Sea (ECS) for OCP analysis. The sediment records of HCHs and DDTs in estuarine environment reflected remobilization of chemicals from enhanced soil erosion associated to extreme flood events or large scale land use transformation. The sediment records in the open sea, instead, reflected long-term historical trends of OCP application in the source region. Unlike the so-called mud wedge distribution of sediment, inventories of HCHs and DDTs slightly increased from the mouth of Yangtze River alongshore toward south, suggesting the sediment deposition rate was one of factors on the exposure of chemicals within the inner shelf of the ECS. Re-suspension and transport of the Yangtze-derived sediment and consequent fractionation in grain size and TOC were also responsible for the spatial variation of inventories of catchment derived OCPs in a major repository area of the Yangtze suspended sediment. The total burdens of HCHs and DDTs in the inner shelf of the ECS were 35 tons and 110 tons, respectively. After 1983 (year of the official ban in China), those values were 13 tons and 50 tons, respectively. It appears that the Yangtze still delivers relatively high inputs of DDTs more than 30 years after the official ban. High proportions of ODD + DDE and beta-HCH suggested those OCPs mainly originated from historical usage in the catchment recent years.
学科领域	环境地球化学
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/5767
专题	环境地球化学国家重点实验室_环境地球化学国家重点实验室_期刊论文
推荐引用方式 GB/T 7714	Tian Lin,Luca Nizzetto,Zhigang Guo,et al. DDTs and HCHs in sediment cores from the coastal East China Sea[J]. Science of The Total Environment,2015,539(2):388-394.
APA	Tian Lin,Luca Nizzetto,Zhigang Guo,Yuanyuan Li,Jun Li,&Gan Zhang.(2015).DDTs and HCHs in sediment cores from the coastal East China Sea.Science of The Total Environment,539(2),388-394.
MLA	Tian Lin,et al."DDTs and HCHs in sediment cores from the coastal East China Sea".Science of The Total Environment 539.2(2015):388-394.

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