State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Helmholtz Zentrum München - German Research Center for Environmental Health, Molecular EXposomics (MEX), Ingolstädter Landstrasse 1, D-85764, Germany; TUM, Wissenschaftszentrum Weihenstephan für Ernährung, Landnutzung und Umwelt, Department für Biowissenschaften, Weihenstephaner Steig 23, 85350 Freising, Germany.
Sci Total Environ. 2015 Jun 15;518-519:328-36. doi: 10.1016/j.scitotenv.2015.03.024. Epub 2015 Mar 12.
This study investigated a wide range of semi-volatile organic compounds (SVOCs), including 28 persistent organochlorine pesticides (OCPs), 18 polychlorinated biphenyls (PCBs), 13 polybrominated diphenyl ethers (PBDEs), and 3 hexabromocyclododecane (HBCD) congeners in lichen, moss and soil collected from the southeastern Tibetan Plateau, China. This allows research provides insight into elevation gradient distributions and possible cold trapping effects of SVOCs in this high mountain area, and compares lichens and mosses as air passive samplers for indicating SVOC occurrences. DDTs, endosulfans, HCHs and hexachlorobenzene predominated in all of the samples. Source analysis indicted that there were fresh inputs of DDTs and HCHs in the sampling region. Lichens and mosses shared commonalities in revealing the profiles and levels of SVOCs based on their lipid-content-normalized concentrations. The concentrations of 12 OCPs and 14 PCBs in lichens were significantly linearly correlated with altitudes, whereas the correlations for mosses and soil with altitudes were insignificant. Both a frequency distribution diagram and the Mountain Contamination Potential Model indicated that SVOCs with specific values of log KOA (8-11) and log KWA (2-4) had relative high mountain contamination potential on the Tibetan Plateau.
本研究调查了广泛的半挥发性有机化合物（SVOCs），包括 28 种持久性有机氯农药（OCPs）、18 种多氯联苯（PCBs）、13 种多溴二苯醚（PBDEs）和 3 种六溴环十二烷（HBCD）同系物，这些物质存在于中国青藏高原东南部采集的地衣、苔藓和土壤中。该研究提供了对高山地区 SVOCs 海拔梯度分布和可能的冷阱效应的深入了解，并比较了地衣和苔藓作为指示 SVOCs 存在的空气被动采样器。DDTs、硫丹、六氯环己烷和六氯苯在所有样品中均占主导地位。来源分析表明，采样区域有 DDTs 和 HCHs 的新鲜输入。地衣和苔藓在基于脂质含量归一化浓度揭示 SVOCs 的特征和水平方面具有共同性。12 种 OCPs 和 14 种 PCBs 在地衣中的浓度与海拔呈显著线性相关，而苔藓和土壤与海拔的相关性不显著。频率分布图和山地污染潜力模型均表明，log KOA（8-11）和 log KWA（2-4）值特定的 SVOCs 在青藏高原上具有相对较高的山地污染潜力。
