State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; China National Environmental Monitoring Centre, Beijing 100012, China.
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Environ Int. 2020 Jul;140:105767. doi: 10.1016/j.envint.2020.105767. Epub 2020 May 1.
Research on the environmental fate and behavior of short- and medium-chain chlorinated paraffins (SCCPs and MCCPs, respectively), especially in high-altitude remote mountain areas, has rarely been conducted. In this study, the distribution and profiles of SCCPs and MCCPs in soils, barks, needles, lichens, and mosses in the Tibetan Plateau area were investigated during the period from 2010 to 2016. The total CP concentrations in soils, barks, needles, lichens, and mosses increased with increasing altitude from 1983 to 5147 m a.s.l. (above sea level), covering a range of 1843.5 km × 370.6 km. Generally, the mean SCCP levels were higher than mean MCCP levels in different environmental matrices. Moreover, as-obtained linear relationships between CP concentrations in different environmental matrices and altitudes (p < 0.05) indicated that the mountain cold-trapping could affect the presence and congener patterns of both SCCPs and MCCPs in the Tibetan Plateau environment. C and C congener groups were found to be the dominant groups in SCCPs and MCCPs in the environmental samples, respectively. Finally, the back-trajectory model was employed to reveal the differences of the potential sources in different regions of the Tibetan Plateau.
对短链和中链氯化石蜡（SCCPs 和 MCCPs，分别）在环境中的归宿和行为的研究，尤其是在高海拔偏远山区，很少进行。本研究于 2010 年至 2016 年期间调查了青藏高原地区土壤、树皮、针叶、地衣和苔藓中 SCCPs 和 MCCPs 的分布和特征。土壤、树皮、针叶、地衣和苔藓中总氯代石蜡（CP）浓度随海拔从 1983 米至 5147 米（海拔）升高而增加，覆盖范围为 1843.5 千米×370.6 千米。一般来说，不同环境基质中 SCCP 的平均水平高于 MCCP 的平均水平。此外，不同环境基质中 CP 浓度与海拔之间的线性关系（p<0.05）表明，山地冷捕获可能会影响青藏高原环境中 SCCPs 和 MCCPs 的存在和同系物模式。在环境样品中，C 和 C 同系物组分别被发现是 SCCPs 和 MCCPs 的主要同系物组。最后，利用后向轨迹模型揭示了青藏高原不同地区潜在来源的差异。
