高原(数学)
环境科学
全氟辛烷
沉积物
环境化学
水槽(地理)
高度(三角形)
空间分布
自然地理学
水文学(农业)
地理
地质学
化学
磺酸盐
地貌学
数学分析
几何学
数学
有机化学
遥感
岩土工程
钠
地图学
作者
Yu Chen,Lijia Wei,Wei Luo,Ning Jiang,Yali Shi,Zhao Pin,Bila Ga,Zhiguo Pei,Yingming Li,Ruiqiang Yang,Qinghua Zhang
标识
DOI:10.1016/j.jhazmat.2022.130170
摘要
Per-and polyfluoroalkyl substances (PFASs) are omnipresent globally and received increasing attention recently. However, there are limited data on PFASs in the Tibetan Plateau (TP), a remote high-altitude mountain region, which is regard as an important indicator region to study long-range transport behaviors of contaminants. This study investigates the occurrence, distribution, partitioning behavior, and sources of 26 PFASs in water and sediments from the four lakes of TP. The ΣPFAS concentrations ranged from 338 to 9766 pg L-1 in water, and 12.2-414 pg g-1 dry weight in sediments. Perfluorobutanonic acid (PFBA) and perfluorooctane sulfonate (PFOS) were detected in all samples. Qinghai Lake had the highest ΣPFAS concentrations in both water and sediments, while the Ranwu Lake had the lowest. The functional groups and CF2 moiety units were investigated as essential factors influencing the partition behavior. Principal component analysis (PCA) combined back-trajectory was used to infer possible sources of PFASs. The results suggested that the main source of PFASs in Yamdrok Lake, Namco Lake, and Ranwu Lake on southern TP were mainly originated from South Asia via long-range atmospheric transport (LRAT); while for the Qinghai Lake of northern TP, LRAT, local emissions, and tourism activities were the primary sources of PFASs.
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