Spatial and vertical distribution of organochlorine pesticides in sediments from Daya Bay, South China

被引：65

作者：

Wang, Zhiyuan ^{[1
,2
]}

Yan, Wen ^{[1
,2
]}

Chi, Jisong ^{[1
,2
]}

Zhang, Gan ^{[3
]}

机构：

[1] Chinese Acad Sci, S China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China

[2] Chinese Acad Sci, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China

[3] Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Guangdong, Peoples R China

来源：

MARINE POLLUTION BULLETIN | 2008年 / 56卷 / 09期

关键词：

organochlorine pesticides; DDTs; HCHs; sediment; Daya Bay;

D O I：

10.1016/j.marpolbul.2008.05.019

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The spatial and vertical distribution of organochlorine pesticides (OCPs) has been investigated in Daya Bay, China. The concentration of total OCPs in surface sediment range from 16.66 to 44.04 ng/g dry weight with a mean concentration of 26.60 ng/g. DDTs and HCHs were the predominant species. The ratios of (DDD + DDE)/DDT reflected a cocktail input pattern of fresh and weathered DDTs. The predominant alpha-HCH and the alpha/beta-HCH ratios indicated that the technical HCH contamination was mainly due to historical usage, although there was fresh input of lindane. The variation profiles of concentrations showed that OCPs were extensively applied between the late 1950s and early 1980s in China. A recent increasing trend in concentrations of DDTs and HCHs was found in both cores. The increasing ratios of (DDE + DDD)/DDT with corresponding decreases of DDE/DDT ratio implied that most of the DDTs deposited after their production ban were more likely "weathered" DDTs derived from soil residues. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：1578 / 1585

页数：8

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