Earth Science Frontiers ›› 2016, Vol. 23 ›› Issue (5): 281-290.DOI: 10.13745/j.esf.2016.05.027

• Article • Previous Articles     Next Articles

Polycyclic aromatic hydrocarbons (PAHs) in the topsoils of typical reclaimed area in Pingshuo opencast coal mine: Status, sources and risk.

 YANG  Ke, JIANG  Jian-Jun, LIU  Fei, BAI  Zhong-Ke   

  1. 1. School of Earth Sciences and Resources, China University of Geosciences(Beijing), Beijing 100083, China
    2. Key Laboratory of Geochemical Cycling of Carbon and Mercury in the Earths Critical Zone, Institute of Geophysical & Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, China
    3. Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, China
    4. Department of Technology and International Cooperation, Ministry of Land and Resources，Beijing 100812, China
    5. School of Land Science and Technology, China University of Geosciences(Beijing), Beijing 100083, China
    6. Key Laboratory of Land Consolidation and Rehabilitation, Ministry of Land and Resources, Beijing 100035, China
    7. State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for EcoEnvironmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
  • Received:2016-03-18 Revised:2016-04-29 Online:2016-09-15 Published:2016-09-15

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Abstract:

Coal mining, storage, transportation and processing process is the main source of polycyclic aromatic hydrocarbons (PAHs) pollution, but its influence on soil environmental quality of opencast coal mine reclamation area is not clear, because of the lack of the systematic survey. Pingshuo opencast coal mine reclamation area is mainly used as cultivated land. Understanding its PAHs pollution condition is important to food security and human health. Through the field survey, this study conducted an ecological risk assessment of PAHs in soils. 179 surface soil samples (020 cm) were collected by 500 m×500 m grid, then analyzed by 1 km×1 km compositional cell. Agilent high resolution gas chromatographylow resolution mass spectrometry (Agilent 6890 GC/5973i MS) were used for target detection and substitute standard 2fluorine biphenyl (2FBP) were added for recovery rate control. The total concentration of 16 EPAPAHs ranged from 213.60 to 2513.20 ng/g with a mean value of 717.09 ng/g. Individual composition of PAHs was of 52% for 34 rings, 42% for 56 ring and 6% for 2 ring respectively. A correlation analysis determined that the main pollution source is coal. According to the results of ecological risk assessment, the reuse of reclamation land as cultivated land should be paid more attention on PAHs pollution in soils.

Key words: persistent organic pollutants (POPs), ecological risk, Shanxi Province, ecological restoration, derelict land

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