Historical contamination and ecological risk of organochlorine pesticides in sediment core in northeastern Chinese river.
Historical contamination and ecological risk of organochlorine pesticides in sediment core in northeastern Chinese river.
复制标题
DOI：
10.1016/j.ecoenv.2013.04.009
复制
发表时间：
2013-07
影响因子：
6.8
通讯作者：
Luo Wang;Hongliang Jia;Xianjie Liu;Yeqing Sun;Meng Yang;Wenjun Hong;Hong Qi;Yi-Fan Li
中科院分区：
文献类型：
--
作者：
Luo Wang;Hongliang Jia;Xianjie Liu;Yeqing Sun;Meng Yang;Wenjun Hong;Hong Qi;Yi-Fan Li
为全面了解大凌河流域21种有机氯农药（OCPs）的分布、来源、污染历史和生态风险，对大凌河流域28个表层沉积物样品和1个沉积物柱样进行了分析。结果表明，六氯环己烷和二氯二苯基三氯乙烷是表层沉积物样本中最常检测到的污染物，浓度（ngg− 1干重）分别为1.1至30和2.2至45。方差分析表明，不同地点表层沉积物中HCHs和DDTs残留量差异显著（P<0.05）。沉积物芯样中六氯环己烷和滴滴涕的残留量（ngg−1dw）分别为2.1 - 18和9.1 - 53。沉积物柱样中HCHs和DDTs浓度的时间变化趋势受到施用历史、排放和土壤残留的影响。HCHs和DDTs的成分分析表明，新的来源主要是农业活动造成的林螨醇和三氯杀螨醇。此外，根据现有的沉积物质量基准，DDTs对大凌河和渤海底栖生物可能存在轻微的潜在健康风险。
Twenty-eight surface sediment samples and one sediment core were analyzed for 21 organochlorine pesticides (OCPs), in order to provide extensive information of distribution, sources, pollution history and ecological risk of these OCP compounds in Daling River area, China. The results showed that hexachlorocyclohexanes (HCHs) and dichlorodiphenyltrichloroethanes (DDTs) were the most frequently detected contaminants in the surface sediment samples with concentrations (in ngg−1dry weight (dw)) from 1.1 to 30 and from 2.2 to 45, respectively. Analysis of variance showed significant (P<0.05) differences between HCHs and DDTs residues in surface sediment sampled from the various locations. Residues of HCHs and DDTs in sediment core (in ngg−1dw) ranged from 2.1 to 18 and 9.1 to 53, respectively. The temporal trends of HCHs and DDTs concentrations in the sediment core were affected by application history, emission and soil residues. Compositional analysis of HCHs and DDTs indicated that new sources were lindane and dicofol mainly due to agricultural activities. Additionally, based on the available sediment quality guidelines, slight potential health risks of DDTs may exist to benthic organisms in Daling River and Bohai Sea.