Declining polychlorinated dibenzo-p-dioxins and dibenzofurans levels in the sediments from Dongting Lake in China

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Declining polychlorinated dibenzo-p-dioxins and dibenzofurans levels in the sediments from Dongting Lake in China
	Gao, L. R. ; Zheng, M. H. ; Zhang, B. ; Liu, W. B. ; Zhao, X. R. ; Zhang, Q. H.
刊名	CHEMOSPHERE
	2008-08
卷号	73 期号:1 页码:S176-S179
关键词	dioxins sodium pentachlorophenol sediment Dongting lake
英文摘要	Dongting Lake is the second largest freshwater lake in China. Technical sodium pentachlorophenate (Na-PCP) had been sprayed since 1960s to control the spread of snailborne schistosomiasis up to the middle of 1990s. As one of the by-products of Na-PCP, polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) may enter the environment. It has been reported that the concentrations of PCDD/Fs in sediments in Dongting Lake were 130-891 pg I-TEQ g(-1) in 1995. High toxicity of sediment to exposed microorganisms and fish may be risk on environment. In order to determine the present levels of the contamination, eight sediment samples from Dongting Lake were analyzed for PCDD/Fs using HRGC-HRMS. Total I-TEQ values for these samples were at a ranged of 0.7-11 pg g(-1), with a mean value of 4.5 pg g(-1). The results show that PCDD/Fs concentrations of contemporary sediment have declined since 1995. Certain PCDD/F congeners as well as OCDD, typical for Na-PCP, predominated in lake sediment indicating that the using of PCP-Na is the main source of PCDD/Fs in the lake. These variations in levels can reflect changes in PCDD/F sources to the environment over time. (c) 2008 Elsevier Ltd. All rights reserved.
WOS记录号	WOS:000259359100029
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/21928]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
推荐引用方式 GB/T 7714	Gao, L. R.,Zheng, M. H.,Zhang, B.,et al. Declining polychlorinated dibenzo-p-dioxins and dibenzofurans levels in the sediments from Dongting Lake in China[J]. CHEMOSPHERE,2008,73(1):S176-S179.
APA	Gao, L. R.,Zheng, M. H.,Zhang, B.,Liu, W. B.,Zhao, X. R.,&Zhang, Q. H..(2008).Declining polychlorinated dibenzo-p-dioxins and dibenzofurans levels in the sediments from Dongting Lake in China.CHEMOSPHERE,73(1),S176-S179.
MLA	Gao, L. R.,et al."Declining polychlorinated dibenzo-p-dioxins and dibenzofurans levels in the sediments from Dongting Lake in China".CHEMOSPHERE 73.1(2008):S176-S179.