Abstract：The surface soil and fir (Abies Mill.) samples were collected in March and December 2017 along the China National Highway 318 in Shergyla Mountain, respectively. The contents of polycyclic aromatic hydrocarbons (PAHs) in the samples were measured. The concentrations of ∑16PAHs ranged from 30.21 to 366.94ng/g (dry weight) in the surface soil and 39.53 to 236.42ng/g (dry weight) in the fir leaves, respectively, and the lower rings (2- or 3-ring) constituents were dominants. The results of diagnostic ratios and principal component analysis suggested that the PAHs mainly originated from the combustion of fossil fuel and biomass, and also affected by oil leaks and atmospheric transmission. The atmospheric transmission pollution of PAHs could mainly result from the Indian subcontinent based on the backward air mass trajectories. The incremental lifetime cancer risks of PAHs in the soils along the highway in Shergyla Mountain were lower than 1×106, indicating a lower carcinogenic risk to the local residents.
党天剑, 陆光华, 薛晨旺, 孙文青. 西藏色季拉山公路沿线PAHs分布、来源及风险[J]. 中国环境科学, 2019, 39(3): 1109-1116.
DANG Tian-jian, LU Guang-hua, XUE Chen-wang, SUN Wen-qing. Distribution, sources and risk of polycyclic aromatic hydrocarbons along the highway in Shergyla Mountain in Tibet. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(3): 1109-1116.
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