Contamination of organochlorine pesticides in water and sediments from a waterbird-inhabited lake, East Central China
Contamination of organochlorine pesticides in water and sediments from a waterbird-inhabited lake, East Central China
复制标题
华东地区水鸟栖息湖泊水体和沉积物中有机氯农药污染
DOI：
10.1007/s11356-014-2831-x
复制
发表时间：
2014-08-01
影响因子：
5.8
通讯作者：
Xing, Xinli
中科院分区：
文献类型：
--
作者：
Hu, Ying;Yuan, Linxi;Xing, Xinli
以水鸟栖息地--羊柴湖为研究对象，分析了17种有机氯农药（OCPs）在水体和沉积物中的污染现状和潜在风险。水和沉积物中的总有机氯农药浓度分别为10.12-59.75纳克/升和4.25-27.35纳克/克干重。六氯环己烷（HCHs）和二氯二苯基三氯乙烷（DDTs）是最丰富的有机氯农药，而六氯苯和环二烯农药的检测水平较低。受水鸟影响较大的样点的∑OCPs（17种OCPs之和）水平显著高于无明显水鸟影响的样点（单因素方差分析，P<0. 05），表明鸟类活动是影响这些污染物浓度分布的原因之一。水体和沉积物中有机氯农药的组成和来源分析表明，可能有新引入的林丹和七氯。大多数有机氯农药在水和沉积物之间的分配不平衡。生态风险评估结果表明，研究区DDTs的残留水平可能对生态系统造成不利影响。
Seventeen organochlorine pesticides (OCPs) were investigated in the water and sediments from a waterbird-inhabited lake (Yangchaihu Lake) to evaluate their current pollution levels and potential risks. The concentrations of total OCPs in water and sediments were 10.12–59.75 ng/l and 4.25–27.35 ng/g dry weight, respectively. Hexachlorocyclohexanes (HCHs) and dichlorodiphenyltrichloroethanes (DDTs) were the most abundant OCPs, while HCB and cyclodiene pesticides were detected with low levels. Levels of ∑OCPs (sum of 17 OCPs) at sites highly influenced by waterbirds were significantly higher than the sites with no significant waterbird populations (one-way ANOVA,P< 0.05), suggesting that bird activities were one reason for concentration distribution of these pollutants. Compositional and source analyses of OCPs in water and sediments indicated that there might be fresh introduction of lindane and heptachlor. The partitions of most OCPs were not in equilibrium between water and sediments. The results of an ecological risk assessment showed that residue levels of DDTs in the studied area might pose adverse effects on ecosystems.