Occurrence of organochlorine pesticides in the environmental matrices from King George Island, west Antarctica
Occurrence of organochlorine pesticides in the environmental matrices from King George Island, west Antarctica
复制标题
南极洲西部乔治王岛环境基质中有机氯农药的存在
DOI：
10.1016/j.envpol.2015.06.025
复制
发表时间：
2015
影响因子：
8.9
通讯作者：
Jiang Guibin
中科院分区：
文献类型：
--
作者：
Zhang Qinghua;Chen Zhaojing;Li Yingming;Wang Pu;Zhu Chaofei;Gao Guanjun;Xiao Ke;Sun Huizhong;Zheng Shucheng;Liang Yong;Jiang Guibin
南极洲被认为是许多持久性有机污染物的最终汇。本研究旨在利用高分辨气相色谱/高分辨质谱联用技术研究有机氯农药（OCPs）的含量、分布和潜在来源。在西南极乔治王岛不同环境基质中测定了23种有机氯农药。土壤和沉积物中的总浓度（1，230 OCPs）处于相当低的水平，范围为93.6- 1，260 pg g− 1干重，苔藓中为223- 1，053 pg g− 1干重，地衣中为373-812 pg g− 1干重。六氯苯（HCB）、二氯二苯基三氯乙烷（DDT）及其代谢产物（尤其是p，p′-DDE）和六氯环己烷（HCHs）是所有样品中的主要污染物。与技术产品相比，较低的α-HCH/γ-HCH和较高的p，p′-DDE/p，p′-DDT比值表明，近期生产的和老化的技术滴滴涕具有远距离大气迁移（LRAT）。观察到许多有机氯农药浓度对总有机碳（TOC）的显著依赖性。除了LRAT，当地的生物活动也可以贡献和影响污染物的空间分布。
Antarctica is considered as a final sink of many persistent organic pollutants (POPs). This work aims to investigate the levels, distributions and potential sources of organochlorine pesticides (OCPs) with HRGC/HRMS technique. Twenty-three OCPs were measured in various environmental matrices from King George Island, west Antarctica. The total concentrations (Σ23OCPs) were at quite low levels, ranging 93.6–1260 pg g−1dry weight (dw) in soil and sediment, 223–1053 pg g−1dw in moss and 373–812 pg g−1dw in lichen. Hexachlorobenzene (HCB), dichloro-diphenyl-trichloroethane (DDT) and its metabolites (especiallyp,p′-DDE) and hexachlorocyclohexanes (HCHs) were the main contaminants in all samples. Lowerα-HCH/γ-HCH and higherp,p′-DDE/p,p′-DDT ratios compared with the technical products indicated long-range atmospheric transport (LRAT) of recent lindane and aged technical DDT. Significant dependence of many OCPs concentrations on total organic carbon (TOC) was observed. Apart from LRAT, local biotic activities could also contribute and influence the spatial distribution of the contaminants.