Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin University of Science & Technology, Tianjin, 300457, China.
Environ Sci Pollut Res Int. 2017 Dec;24(35):26967-26973. doi: 10.1007/s11356-015-5882-8. Epub 2015 Dec 9.
Hexachlorocyclohexanes (HCHs) and dichlorodiphenyltrichloroethanes (DDTs) tend to persist in the environment for long periods of time. The concentration and distribution of HCHs and DDTs were investigated in surface sediments of Yongdingxinhe wetland and Binhai wetland by gas chromatography-mass spectrometer (GC-MS). All isomers of HCHs and DDTs were detected in all of the samples. The concentrations of total HCHs (ΣHCHs) in two wetland sediments ranged from 69.81 to 379.28 ng · g , with a mean value of 224.55 ng · g . The concentrations of total DDTs (ΣDDTs) ranged from 98.32 to 129.10 ng · g , with a mean value of 113.71 ng · g . The results of an ecological risk assessment demonstrated that there was high-risk ecological effect of organochlorine pesticides (OCPs) on the estuary wetlands. Lindane and technical DDTs were found to be the main sources of OCPs.
六氯环己烷（HCHs）和滴滴涕（DDTs）在环境中往往存在很长一段时间。通过气相色谱-质谱联用仪（GC-MS）对永定新河湿地和滨海湿地表层沉积物中 HCHs 和 DDTs 的浓度和分布进行了研究。所有 HCHs 和 DDTs 的异构体均在所有样品中检测到。两种湿地沉积物中总 HCHs（ΣHCHs）的浓度范围为 69.81-379.28ng·g-1，平均值为 224.55ng·g-1。总滴滴涕（ΣDDTs）的浓度范围为 98.32-129.10ng·g-1，平均值为 113.71ng·g-1。生态风险评估的结果表明，河口湿地有机氯农药（OCPs）具有高风险的生态效应。林丹和技术滴滴涕被认为是 OCPs 的主要来源。
