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Polycyclic Aromatic Hydrocarbons in the Dagang Oilfield (China): Distribution, Sources, and Risk Assessment

Author

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  • Haihua Jiao

    (These authors contributed equally to this work.
    Department of Biological Sciences and Technology, Changzhi University, Changzhi 046011, China
    Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
    These authors contributed equally to this work.)

  • Xiaoping Rui

    (These authors contributed equally to this work.
    Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
    College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
    These authors contributed equally to this work.)

  • Shanghua Wu

    (These authors contributed equally to this work.
    Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
    These authors contributed equally to this work.)

  • Zhihui Bai

    (Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China)

  • Xuliang Zhuang

    (Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China)

  • Zhanbin Huang

    (School of Chemical and Environmental Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China)

Abstract

The levels of 16 polycyclic aromatic hydrocarbons (PAHs) were investigated in 27 upper layer (0–25 cm) soil samples collected from the Dagang Oilfield (China) in April 2013 to estimate their distribution, possible sources, and potential risks posed. The total concentrations of PAHs (∑PAHs) varied between 103.6 µg·kg −1 and 5872 µg·kg −1 , with a mean concentration of 919.8 µg·kg −1 ; increased concentrations were noted along a gradient from arable desert soil (mean 343.5 µg·kg −1 ), to oil well areas (mean of 627.3 µg·kg −1 ), to urban and residential zones (mean of 1856 µg·kg −1 ). Diagnostic ratios showed diverse source of PAHs, including petroleum, liquid fossil fuels, and biomass combustion sources. Combustion sources were most significant for PAHs in arable desert soils and residential zones, while petroleum sources were a significant source of PAHs in oilfield areas. Based ontheir carcinogenity, PAHs were classified as carcinogenic (B) or not classified/non-carcinogenic (NB). The total concentrations of carcinogenic PAHs (∑BPAHs) varied from 13.3 µg·kg −1 to 4397 µg·kg −1 across all samples, with a mean concentration of 594.4 µg·kg −1 . The results suggest that oilfield soil is subject to a certain level of ecological environment risk.

Suggested Citation

  • Haihua Jiao & Xiaoping Rui & Shanghua Wu & Zhihui Bai & Xuliang Zhuang & Zhanbin Huang, 2015. "Polycyclic Aromatic Hydrocarbons in the Dagang Oilfield (China): Distribution, Sources, and Risk Assessment," IJERPH, MDPI, vol. 12(6), pages 1-17, May.
    • Handle: RePEc:gam:jijerp:v:12:y:2015:i:6:p:5775-5791:d:50131
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    References listed on IDEAS

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    1. Yihua Xiao & Fuchun Tong & Yuanwen Kuang & Bufeng Chen, 2014. "Distribution and Source Apportionment of Polycyclic Aromatic Hydrocarbons (PAHs) in Forest Soils from Urban to Rural Areas in the Pearl River Delta of Southern China," IJERPH, MDPI, vol. 11(3), pages 1-15, March.
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    Cited by:

    1. Haihua Jiao & Qi Wang & Nana Zhao & Bo Jin & Xuliang Zhuang & Zhihui Bai, 2017. "Distributions and Sources of Polycyclic Aromatic Hydrocarbons (PAHs) in Soils around a Chemical Plant in Shanxi, China," IJERPH, MDPI, vol. 14(10), pages 1-19, October.
    2. Yan Zhang & Limin Yuan & Shuli He & Huilin Tao & Wenlian Xie & Xinyu Zhang & Xiaolu Ren & Tao Jiang & Lihong Li & Zhiqiang Zhu, 2022. "Contemporary Research Progress on the Detection of Polycyclic Aromatic Hydrocarbons," IJERPH, MDPI, vol. 19(5), pages 1-24, February.

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