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Distribution, Origins and Hazardous Effects of Polycyclic Aromatic Hydrocarbons in Topsoil Surrounding Oil Fields: A Case Study on the Loess Plateau, China

Author

Listed:
  • Di Wang

    (College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China)

  • Shilei Zhu

    (College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China)

  • Lijing Wang

    (College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China)

  • Qing Zhen

    (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
    Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China)

  • Fengpeng Han

    (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
    Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China)

  • Xingchang Zhang

    (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
    Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China
    Xi’an Branch of Chinese Academy of Sciences, Xi’an 710043, China)

Abstract

The Loess Plateau has one of the most vulnerable ecological environments in the world, but it also contains abundant oil and gas resources that are regularly exploited, which has resulted in serious environmental problems. Therefore, it is important to analyze the polycyclic aromatic hydrocarbons (PAHs) present in the topsoil of this region. The ∑16PAHs concentrations between 1980–1999 and 2000–2019 ranged from 1134.20–15871.04 and 1010.67–18,068.80 µg kg −1 , with average values of 5021.30 and 5662.82 µg kg −1 . All samples displayed heavy pollution levels according to European soil quality standards. In addition, among the measured physicochemical properties, the soil organic carbon (SOC) had the greatest influence on PAHs, while soil particle size distribution had the smallest effect. Source apportionment indicated that the two main sources were petroleum source (37.57%) and vehicular traffic source (25.88%). Lastly, an assessment of the carcinogenic risks illustrated that more focus should be placed on the dermal pathway in which the human body is exposed to soil PAHs. Overall, the carcinogenic risks in different populations did not exceed 10 −4 , but there was still a potential carcinogenic risk in some age groups, especially in adult women.

Suggested Citation

  • Di Wang & Shilei Zhu & Lijing Wang & Qing Zhen & Fengpeng Han & Xingchang Zhang, 2020. "Distribution, Origins and Hazardous Effects of Polycyclic Aromatic Hydrocarbons in Topsoil Surrounding Oil Fields: A Case Study on the Loess Plateau, China," IJERPH, MDPI, vol. 17(4), pages 1-14, February.
    • Handle: RePEc:gam:jijerp:v:17:y:2020:i:4:p:1390-:d:323566
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    References listed on IDEAS

    as
    1. Jianling Xu & Hanxi Wang & Lianxi Sheng & Xuejun Liu & Xiaoxue Zheng, 2017. "Distribution Characteristics and Risk Assessment of Polycyclic Aromatic Hydrocarbons in the Momoge Wetland, China," IJERPH, MDPI, vol. 14(1), pages 1-15, January.
    2. Wei Cao & Liqin Yin & Dan Zhang & Yingying Wang & Jing Yuan & Yi Zhu & Junfeng Dou, 2019. "Contamination, Sources, and Health Risks Associated with Soil PAHs in Rebuilt Land from a Coking Plant, Beijing, China," IJERPH, MDPI, vol. 16(4), pages 1-16, February.
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    Cited by:

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    2. Awal Noor & Sher Ali Khan, 2023. "Agricultural Wastes as Renewable Biomass to Remediate Water Pollution," Sustainability, MDPI, vol. 15(5), pages 1-19, February.

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