干旱区地理2025，Vol.48Issue(3)：391-404,14.DOI:10.12118/j.issn.1000-6060.2024.181
中天山PM2.5中重金属和多环芳烃污染特征、来源及健康风险评价
Characteristics,sources and health risk assessment of PM2.5-bound heavy metals and polycyclic aromatic hydrocarbons pollution in middle Tianshan Mountains
摘要
Abstract
To investigate the pollution characteristics of PM2.5 in the middle Tianshan Mountains,PM2.5 samples were collected in Wulasitai region of the middle Tianshan Mountains from July to September 2019.Heavy metal contents were analyzed using inductively coupled plasma-mass spectrometry(ICP-MS),while polycyclic aromat-ic hydrocarbons(PAHs)were examined using gas chromatography-mass spectrometry(GC-MS).The study ex-plored the sources and health effects of heavy metals and PAHs in PM2.5.The key results are as follows:(1)Con-centrations of heavy metals and PAHs during summer and autumn in the middle Tianshan Mountains were rela-tively low.The average concentration levels of each element were:Fe>Cu>Zn>Pb>Mn>Cr>As>V>Rb>Ni>Co>Se>Cd>Tl.The total average heavy metal concentration was 238.50 ng·m-3,with Fe(139.90 ng·m-3)and Cu(78.72 ng·m-3)being dominant,while other elements were below 10 ng·m-3.The total average concentration of PAHs was 1.37 ng·m-3,with 3-ring,4-ring,and 5-7 ring PAHs concentration accounting for 3.59%,32.34%,and 64.07%,respectively.(2)During the observation period,PM2.5 was influenced by long-distance transport from the west and short-distance transport from the north and west.It may also have been affected by local valley wind and boundary layer changes.(3)Positive matrix factorization(PMF)identified key pollution sources,including natural gas combustion and petroleum sources(28.56%),vehicle emissions and coal burning(28.46%),biomass burning and industrial pollution(16.14%),non-ferrous metal smelting(14.32%),and dust(12.52%).(4)Direct in-halation of PM2.5 posed a carcinogenic risk to adults and children due to heavy metals and PAHs,with Cr,Co,As,and Se identified as high-risk substances.Non-carcinogenic health risks were relatively low.关键词
PM2.5/重金属/多环芳烃/污染特征/来源解析/中天山Key words
PM2.5/heavy metals/polycyclic aromatic hydrocarbons/pollution characteristics/source analysis/middle Tianshan Mountains引用本文复制引用
柴明辰,徐国杰,甄钟秀,银燕,郑博华,陈魁,李斌,李圆圆..中天山PM2.5中重金属和多环芳烃污染特征、来源及健康风险评价[J].干旱区地理,2025,48(3):391-404,14.基金项目
国家自然科学基金(42006190)资助 （42006190）
