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Open AccessArticle

Distributions and Sources of Polycyclic Aromatic Hydrocarbons (PAHs) in Soils around a Chemical Plant in Shanxi, China

by Haihua Jiao 1,2, Qi Wang 1, Nana Zhao 1, Bo Jin 3, Xuliang Zhuang 2,4 and Zhihui Bai 2,4,*
1
Department of Biological Sciences and Technology, Changzhi University, Changzhi 046011, China
2
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
3
School of Chemical Engineering, The University of Adelaide, Adelaide, SA 5005, Australia
4
College of Environment & Resources, University of Chinese Academy of Sciences, Beijing 100049, China
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2017, 14(10), 1198; https://doi.org/10.3390/ijerph14101198
Received: 10 August 2017 / Revised: 12 September 2017 / Accepted: 14 September 2017 / Published: 9 October 2017
(This article belongs to the Section Environmental Science and Engineering)
Background: Yearly the Shanxi coal chemical industry extracts many coal resources, producing at the same time many polycyclic aromatic hydrocarbons (PAHs) that are emitted as by-products of coal incomplete combustion. Methods: Sixty-six soil samples collected from 0 to 100 cm vertical sections of three different agricultural (AS), roadside (RS) and park (PS) functional soils around a chemical plant in Shanxi, China were analyzed for the presence of the 16 priority control PAHs. Results: The total concentrations (∑16PAHs) varied in a range of 35.4–116 mg/kg, 5.93–66.5 mg/kg and 3.87–76.0 mg/kg for the RS, PS and AS surface soil, respectively, and 5-ring PAHs were found to be dominant (44.4–49.0%), followed by 4-ring PAHs (15.9–24.5%). Moreover, the average value of ∑16PAHs decreased with the depth, 7.87 mg/kg (0–25 cm), 4.29 mg/kg (25–50 cm), 3.00 mg/kg (50–75 cm), 2.64 mg/kg (75–100 cm) respectively, in PS and AS soil vertical sections. Conclusions: The PAH levels in the studied soils were the serious contamination level (over 1.00 mg/kg) according to the Soils Quality Guidelines. The carcinogenic PAHs (ΣBPAHsBapeq) were approximately 14.8 times higher than the standard guideline level (0.60 mg/kg) and 90.3% of PAHs were produced by coal/wood/grass combustion processes. View Full-Text
Keywords: polycyclic aromatic hydrocarbons (PAHs); soil contamination; chemical plant; organic pollutants polycyclic aromatic hydrocarbons (PAHs); soil contamination; chemical plant; organic pollutants
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Jiao, H.; Wang, Q.; Zhao, N.; Jin, B.; Zhuang, X.; Bai, Z. Distributions and Sources of Polycyclic Aromatic Hydrocarbons (PAHs) in Soils around a Chemical Plant in Shanxi, China. Int. J. Environ. Res. Public Health 2017, 14, 1198.

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