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Int. J. Environ. Res. Public Health 2018, 15(8), 1785; https://doi.org/10.3390/ijerph15081785

Concentration and Potential Ecological Risk of PAHs in Different Layers of Soil in the Petroleum-Contaminated Areas of the Loess Plateau, China

1
College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China
2
Inspection and Testing Center for Quality and Safety of Agricultural Products, Ningxia Institute of Agricultural Survey and Design, Yinchuan 750002, China
3
State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China
*
Author to whom correspondence should be addressed.
Received: 30 July 2018 / Revised: 15 August 2018 / Accepted: 17 August 2018 / Published: 20 August 2018
(This article belongs to the Collection Environmental Risk Assessment)
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Abstract

The three most representative areas of petroleum pollution on the Loess Plateau are the research subjects of this study. In this study, 16 priority polycyclic aromatic hydrocarbons (PAHs) were determined by the QuEChERS method combined with gas chromatography-tandem mass spectrometry (GC-MS/MS). The total concentrations of ∑16PAHs in top layer soils (0–10 cm), middle layer soils (10–30 cm), and bottom layer soils (30–50 cm) ranged from 1010.67 to 18,068.80, 495.85 to 9868.56 and 213.16 to 12,552.53 μg/kg, with an average of 5502.44, 2296.94 and 2203.88 μg/kg, respectively. The 3-ring and 4-ring PAHs were the most prominent components in all soil samples. Meanwhile, the average value of ∑16PAHs decreased with the depth, from 5502.44 μg/kg (0–10 cm) to 2203.88 μg/kg (30–50 cm). The PAHs levels in the studied soils were heavily polluted (over 1000 μg/kg) according to the Soils Quality Guidelines and 95% of PAHs come from petroleum sources. Moreover, the total of PAHs in petroleum-contaminated soils was assigned a high ecological risk level. Toxic equivalency quantities (TEQs) indicated that PAHs in petroleum-contaminated soils presented relatively high toxicity. View Full-Text
Keywords: polycyclic aromatic hydrocarbons (PAHs); petroleum-contaminated; concentration; ecological risk; Loess Plateau polycyclic aromatic hydrocarbons (PAHs); petroleum-contaminated; concentration; ecological risk; Loess Plateau
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Wang, D.; Ma, J.; Li, H.; Zhang, X. Concentration and Potential Ecological Risk of PAHs in Different Layers of Soil in the Petroleum-Contaminated Areas of the Loess Plateau, China. Int. J. Environ. Res. Public Health 2018, 15, 1785.

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