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Characterization and Risk Assessment of Polychlorinated Biphenyls in City Park Soils of Xi’An, China

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Abstract

Polychlorinated biphenyl (PCB) concentrations in surface soil samples (0–10 cm) from 23 city parks (8 urban and 15 suburban) from Xi’An, China were presented. The average concentration of Σ7 PCBs among all the sites was 1.68 ng g−1 dry weight. High detection frequency (100 %) of PCB 28 and PCB 52 suggested wide occurrence of PCB contaminations in Xi’An. Among these PCBs, PCB 28, 52 and 153 were the most dominant compounds (14.9 %, 39.3 % and 9.5 % of the Σ7 PCBs on average, respectively). “Urban fractionation effect” was found in Xi’An. In other words, PCB concentrations were higher in the urban city park soils than those in suburban park soils. The PCB contamination in Xi’An city park soils were at a low level based on the Dutch guideline. However, dioxin-like PCB congeners were detected from 12 parks, which indicated further investigation was urgently required in future. Furthermore, total PCB concentrations were used to evaluate the cancer risk via ingestion, dermal and inhalation and the results showed that the total cancer risk was at the very low level in this area.

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Acknowledgments

This research was supported by the Key Research Program of the Chinese Academy of Sciences, Grants # KZZD-EW-04, the National Basic Research Program of China (No. 2013CB955901) and the National Natural Science Foundation of China Grants # 41103009 (H.X. Lu).

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Authors and Affiliations

  1. State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, 710075, China

    Hongxuan Lu & Weiguo Liu

  2. School of Human Settlement and Civil Engineering, Xi’an Jiaotong University, Xi’an, 710049, China

    Weiguo Liu

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  1. Hongxuan Lu
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  2. Weiguo Liu
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Correspondence to Hongxuan Lu.

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Lu, H., Liu, W. Characterization and Risk Assessment of Polychlorinated Biphenyls in City Park Soils of Xi’An, China. Bull Environ Contam Toxicol 94, 393–398 (2015). https://doi.org/10.1007/s00128-015-1463-2

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  • DOI: https://doi.org/10.1007/s00128-015-1463-2

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