CUED Publications database

Structural equation modeling of PAHs in ambient air, dust fall, soil, and cabbage in vegetable bases of Northern China

Zhang, YH and Hou, DY and Xiong, GN and Duan, YH and Cai, CY and Wang, X and Li, JY and Tao, S and Liu, WX (2018) Structural equation modeling of PAHs in ambient air, dust fall, soil, and cabbage in vegetable bases of Northern China. Environmental Pollution, 239. pp. 13-20. ISSN 0269-7491

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Abstract

© 2018 Elsevier Ltd 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. An innovative SEM combined with factor analysis systematically discovered the possible transport pathways of PAHs from environmental media to different parts of cabbages and translocations between different tissues.

Item Type: Article
Uncontrolled Keywords: Air-soil exchange Cabbage tissues Factor analysis PAHs Structural equation modeling Air Brassica China Dust Environmental Monitoring Polycyclic Aromatic Hydrocarbons Soil
Subjects: UNSPECIFIED
Divisions: Div D > Geotechnical and Environmental
Depositing User: Cron Job
Date Deposited: 01 Oct 2018 20:11
Last Modified: 27 Oct 2020 06:51
DOI: 10.1016/j.envpol.2018.03.084