title: Ecological and health risk-based characterization of agricultural soils contaminated with polycyclic aromatic hydrocarbons in the vicinity of a chemical plant in China.
abstract: Polycyclic aromatic hydrocarbons (PAHs) from chemical plants can cause serious pollution of surrounding agricultural soils. A comprehensive study of agricultural soils was conducted in the vicinity of a chemical plant in China to characterize the soil PAH concentration, as well as their composition and sources. Human health and a screening-level ecological risk assessment were conducted for PAH contamination in agricultural soils. The results showed that the total concentrations of 16 priority PAHs ranged from 250.49 to 9387.26 ng g(-1), with an average of 2780.42 ng g(-1). High molecular weight PAHs (four to six rings) were the dominant component, accounting for more than 60% of all PAHs. Principal component analysis (PCA) and positive matrix factorization model (PMF) suggested that diesel emissions, coal combustion, coke ovens, and fuel combustion and gasoline emissions were the main sources of PAHs in agricultural soils. The ecological risk assessment results based on the effects range-low (ERL), the effects range-median (ERM), and the ecological screening levels (ESL) indicated that the exposure to ∑PAH16 was >ERL, >ERM, and ≥ERL and <ERM at 21.9, 0, and 21.9% of the soil sampling stations, the exposure to ∑PAH16 was >ESL at 78.1% of the soil sampling stations, and could induce biological effects in mammals. The Bapeq concentrations posed a potential carcinogenic risk to humans. Further risk management and control of soil PAHs in these agricultural soils is required to ensure the safety of the biocoenosis and human health.
authors: Research Center for Scientific Development in Fenhe River Valley, Taiyuan Normal University, Jinzhong 030619, China.
authors: Geng
authors: G
authors: Liu
authors: Research Center for Scientific Development in Fenhe River Valley, Taiyuan Normal University, Jinzhong 030619, China.
authors: Junjie
authors: J
authors: Niu
authors: Research Center for Scientific Development in Fenhe River Valley, Taiyuan Normal University, Jinzhong 030619, China.
authors: Wenjiong
authors: W
authors: Guo
authors: Research Center for Scientific Development in Fenhe River Valley, Taiyuan Normal University, Jinzhong 030619, China.
authors: Xiangsheng
authors: X
authors: An
authors: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China. Electronic address: zhaolong@craes.org.cn.
authors: Long
authors: L
authors: Zhao
mesh_terms: D000383:Agriculture; D002273:Carcinogens / Q000032:analysis; D002681:China; D003031:Coal / Q000032:analysis; D003077:Coke / Q000032:analysis; D004784:Environmental Monitoring / Q000379:methods*; D005742:Gasoline; D005843:Geography; D006801:Humans; D011084:Polycyclic Aromatic Hydrocarbons / Q000737:chemistry*; D025341:Principal Component Analysis; D018570:Risk Assessment; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis*
chemical_list: D002273:Carcinogens; D003031:Coal; D003077:Coke; D005742:Gasoline; D011084:Polycyclic Aromatic Hydrocarbons; D012987:Soil; D012989:Soil Pollutants
keywords: Agricultural soils; Ecological risk assessment; Health risk assessment; PAHs