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[求助补充材料] Polycyclic aromatic hydrocarbons in surface soil across the Tibetan Plateau: Spatial distribution, source and airesoil exchange
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There are limited data on polycyclic aromatic hydrocarbons (PAHs) in both the atmosphere and soil of the Tibetan Plateau (TP). Concentrations of PAHs were therefore measured in 13 XAD resin-based passive air samplers and 41 surface (0e5 cm) soil samples across the TP. The average concentration of atmospheric PAHs was 5.55 ng/m3 , which was lower than that reported for other background areas, but higher than the Arctic. Concentrations in the soils fell in a wide range from 5.54 to 389 ng/g, with an average of 59.9 ng/g. Elevation was found to play an important role in determining the spatial distribution of soil PAHs. The airesoil exchange state showed that the soils of the TP will likely remain as a sink for high molecular weight PAHs, but may become a potential “secondary source” for low molecular weight PAHs |
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(2025-6-4)
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