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Identification of sources of polycyclic aromatic hydrocarbons based on concentrations in soils from two sides of the Himalayas between China and Nepal

descriptionPublicationkeyboard_double_arrow_right Article , Journal 01 May 2016Publisher:Elsevier BVJournal:Environmental Pollution, volume 212, pages 424-432 (issn: 0269-7491,

Authors: Jiajia Gao; Wei Luo; Lan Xu; Qianggong Zhang; Xiang Bi; Kumar Y. Romesh; John P. Giesy; +2 Authors

doi: 10.1016/j.envpol.2015.11.018

pmid: 26900777

Identification of sources of polycyclic aromatic hydrocarbons based on concentrations in soils from two sides of the Himalayas between China and Nepal

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Abstract

To understand distribution and sources of polycyclic aromatic hydrocarbons (PAHs) in the Himalayas, 77 soil samples were collected from the northern side of the Himalayas, China (NSHC), and the southern side of the Himalayas, Nepal (SSHN), based on altitude, land use and possible trans-boundary transport of PAHs driven by wind from Nepal to the Tibetan Plateau, China. Soils from the SSHN had mean PAH concentration greater than those from the NSHC. Greater concentrations of PAHs in soils were mainly distributed near main roads and agricultural and urban areas. PAHs with 2-3 rings were the most abundant PAHs in the soils from the Himalayas. Concentrations of volatile PAHs were significantly and positively correlated with altitude. Simulations of trajectories of air masses indicated that distributions of soil PAH concentrations were associated with the cyclic patterns of the monsoon. PAH emissions from traffic and combustion of biomass or coal greatly contributed to concentrations of PAHs in soils from the Himalayas.

Related Organizations

Chinese Academy of Sciences
China (People's Republic of)
Institute of Tibetan Plateau Research
China (People's Republic of)
Center for Excellence in Tibetan Plateau Earth Sciences
China (People's Republic of)
Minzu University of China
China (People's Republic of)
Kathmandu University
Nepal

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Keywords

Air Pollutants, China, Altitude, Agriculture, Wind, Risk Assessment, Soil, Nepal, Air Pollution, Humans, Soil Pollutants, Particulate Matter, Biomass, Polycyclic Aromatic Hydrocarbons, Environmental Monitoring

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