Zhang Qinghua, Chen Zhaojing, Li Yingming, Wang Pu, Zhu Chaofei, Gao Guanjun, Xiao Ke, Sun Huizhong, Zheng Shucheng, Liang Yong, Jiang Guibin
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Institute of Environment and Health, Jianghan University, Wuhan 430056, China.
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Environ Pollut. 2015 Nov;206:142-9. doi: 10.1016/j.envpol.2015.06.025. Epub 2015 Jul 8.
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(-1) dry weight (dw) in soil and sediment, 223-1053 pg g(-1) dw in moss and 373-812 pg g(-1) dw in lichen. Hexachlorobenzene (HCB), dichloro-diphenyl-trichloroethane (DDT) and its metabolites (especially p,p'-DDE) and hexachlorocyclohexanes (HCHs) were the main contaminants in all samples. Lower α-HCH/γ-HCH and higher p,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.
南极洲被认为是许多持久性有机污染物（POPs）的最终归宿地。这项工作旨在利用高分辨率气相色谱/高分辨率质谱技术研究有机氯农药（OCPs）的含量、分布及潜在来源。对来自南极西部乔治王岛的各种环境基质中的23种OCPs进行了测定。土壤和沉积物中总浓度（Σ23OCPs）相当低，干重（dw）范围为93.6 - 1260 pg g⁻¹，苔藓中为223 - 1053 pg g⁻¹ dw，地衣中为373 - 812 pg g⁻¹ dw。六氯苯（HCB）、二氯二苯三氯乙烷（DDT）及其代谢物（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。与工业品相比，较低的α-HCH/γ-HCH和较高的p,p'-DDE/p,p'-DDT比值表明近期林丹和陈旧工业品DDT存在长距离大气传输（LRAT）。观察到许多OCPs浓度与总有机碳（TOC）有显著相关性。除了LRAT外，当地生物活动也可能对污染物的空间分布产生影响。
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