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.
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
Environ Pollut. 2019 Feb;245:46-52. doi: 10.1016/j.envpol.2018.10.112. Epub 2018 Nov 1.
Large amounts of short chain and medium chain chlorinated paraffins (SCCPs and MCCPs) are released into the environment during production and usage. However, compared to SCCPs, there is a significant lack of attention for MCCPs. In this work, 83 air samples, collected between 2012 and 2015 from the Tibetan Plateau, were analyzed to investigate the airborne levels and distributions of MCCPs, further to evaluate their potential long-range transport behavior on the alpine area. The total air MCCP concentrations at Shergyla Mountain and Lhasa were between 50 and 690 pg/m and 800-6700 pg/m, respectively. At Shergyla Mountain, MCCP concentrations in the air appeared an increasing trend with altitude, which indicated that MCCPs could potentially possess the ability of "mountain cold trapping". C and C congener groups were the dominant homologue groups. The mountain contamination potential (MCP) of different congener groups is closely related to their equilibrium partitioning coefficients between octanol and air (K), and water and air (K). Increasing MCCPs levels might be a potential threat to the environment and human exposure.
大量的短链和中链氯化石蜡（SCCPs 和 MCCPs）在生产和使用过程中会释放到环境中。然而，与 SCCPs 相比，MCCPs 受到的关注要少得多。在这项工作中，我们分析了 2012 年至 2015 年期间从青藏高原采集的 83 个空气样本，以调查 MCCPs 的空气浓度和分布情况，进一步评估它们在高山地区的潜在远距离传输行为。在谢尔格拉山和拉萨，总空气 MCCP 浓度分别在 50 到 690 pg/m 和 800 到 6700 pg/m 之间。在谢尔格拉山，空气中的 MCCP 浓度随着海拔的升高呈现出上升的趋势，这表明 MCCPs 可能具有“高山冷阱”的能力。C 和 C 同系物组是主要的同系物组。不同同系物组的山地污染潜力（MCP）与它们在辛醇和空气（K）以及水和空气（K）之间的平衡分配系数密切相关。MCCPs 水平的增加可能对环境和人类暴露构成潜在威胁。
