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Zhang, Yongmei
- Polycyclic Aromatic Hydrocarbon Distribution in Soil and Their Ecological Risk Evaluation in Zhengzhou, China
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Authors
Shubo Cheng
1,
Yongmei Zhang
1
Affiliations
1 Henan Safety and Emergency Research Center, Henan Polytechnic University, Jiaozuo, Henan, 454000, CN
1 Henan Safety and Emergency Research Center, Henan Polytechnic University, Jiaozuo, Henan, 454000, CN
Source
Nature Environment and Pollution Technology, Vol 16, No 1 (2017), Pagination: 315-319Abstract
Polycyclic aromatic hydrocarbon (PAH), as a primary organic pollutant in soil, is highly stable in soil and does not degrade easily. Thus, it accumulates and may penetrate deeper soil, which will cause longterm pollution of soil and underground water. To study PAH concentration distribution in soil in Zhengzhou, China, ecological risk evaluation of PAHs in soil was implemented. In this study, 30 soil samples from different places in Zhengzhou were collected in August 2015. Concentration levels and distribution characteristics of PAHs in the soil samples were analysed, and ecological risk evaluation of PAH pollution in soil was conducted. Results indicated that among the 30 soil samples collected, the content scope of 16 PAHs under priority control of the US Environmental Protection Agency was 436.37- 4,784.13 μg.kg-1 with a mean value of 3,096.71 μg.kg-1. Detection rates of monomers were high, and not all benzo[k]fluoranthene (BkF) and dibenzo[a,h]anthracene were detected. All dibenzo[a]pyrenes with high carcinogenicity were detected with a content scope of 436.37-4,784.13 μg.kg-1 and a mean value of 23.01 μg.kg-1. A total of 27 soil samples exhibited severe PAH pollution, which indicated that overall soil pollution level in Zhengzhou was considerably severe. Only two samples were within ERLERM (effect range-low, effect range-median). However, the PAH contents of most samples were higher than ERM, indicating a high ecological risk of soil PAHs in Zhengzhou. Results will provide indispensable scientific basis for government sectors and relevant environmental protection departments to formulate a reasonable control scheme in determining the total amount of soil pollution and to implement human health protection measures.Keywords
PAHs Distribution, Soil, Ecological Risk Evaluation.Full Text
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