Structural equation modeling of PAHs in ambient air, dust fall, soil, and cabbage in vegetable bases of Northern China.
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Authors
Zhang, YunHui
Hou, DeYi
Xiong, GuanNan
Duan, YongHong
Cai, ChuanYang
Wang, Xin
Li, JingYa
Tao, Shu
Liu, WenXin
Publication Date
2018-08Journal Title
Environ Pollut
ISSN
0269-7491
Publisher
Elsevier BV
Volume
239
Pages
13-20
Language
eng
Type
Article
Physical Medium
Print-Electronic
Metadata
Show full item recordCitation
Zhang, Y., Hou, D., Xiong, G., Duan, Y., Cai, C., Wang, X., Li, J., et al. (2018). Structural equation modeling of PAHs in ambient air, dust fall, soil, and cabbage in vegetable bases of Northern China.. Environ Pollut, 239 13-20. https://doi.org/10.1016/j.envpol.2018.03.084
Abstract
A series of field samples including ambient air (gaseous and particulate phases), dust fall, surface soil, rhizosphere soil and cabbage tissues (leaf, root and core), were collected in vegetable bases near a large coking manufacturer in Shanxi Province, Northern China, during a harvest season. A factor analysis was employed to apportion the emission sources of polycyclic aromatic hydrocarbons (PAHs), and the statistical results indicated coal combustion was the dominant emission source that accounted for different environmental media and cabbage tissues, while road traffic, biomass burning and the coking industry contributed to a lesser extent. A structural equation model was first developed to quantitatively explore the transport pathways of PAHs from surrounding media to cabbage tissues. The modeling results showed that PAHs in ambient air were positively associated with those in dust fall, and a close relationship was also true for PAHs in dust fall and in surface soil due to air-soil exchange process. Furthermore, PAHs in surface soil were correlated with those in rhizosphere soil and in the cabbage leaf with the path coefficients of 0.83 and 0.39, respectively. PAHs in the cabbage leaf may dominantly contribute to the accumulation of PAHs in the edible part of cabbages.
Keywords
Air-soil exchange, Cabbage tissues, Factor analysis, PAHs, Structural equation modeling, Air, Brassica, China, Dust, Environmental Monitoring, Polycyclic Aromatic Hydrocarbons, Soil
Identifiers
External DOI: https://doi.org/10.1016/j.envpol.2018.03.084
This record's URL: https://www.repository.cam.ac.uk/handle/1810/285577
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