Journal
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
Volume 15, Issue 8, Pages -Publisher
MDPI
DOI: 10.3390/ijerph15081785
Keywords
polycyclic aromatic hydrocarbons (PAHs); petroleum-contaminated; concentration; ecological risk; Loess Plateau
Funding
- National Key Research and Development Program of China [2017YFC0504504]
- Science and Technology Service Network Initiative of Chinese Academy of Sciences [KFJ-STS-ZDTP-012]
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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 Sigma 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 g/kg, with an average of 5502.44, 2296.94 and 2203.88 g/kg, respectively. The 3-ring and 4-ring PAHs were the most prominent components in all soil samples. Meanwhile, the average value of Sigma 16PAHs decreased with the depth, from 5502.44 g/kg (0-10 cm) to 2203.88 g/kg (30-50 cm). The PAHs levels in the studied soils were heavily polluted (over 1000 g/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.
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