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Accumulations of Heavy Metals in Roadside Soils Close to Zhaling, Eling and Nam Co Lakes in the Tibetan Plateau

Author

Listed:
  • Xuedong Yan

    (MOE Key Laboratory for Urban Transportation Complex Systems Theory and Technology, Beijing Jiaotong University, Beijing 100044, China)

  • Fan Zhang

    (Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China)

  • Dan Gao

    (MOE Key Laboratory for Urban Transportation Complex Systems Theory and Technology, Beijing Jiaotong University, Beijing 100044, China)

  • Chen Zeng

    (Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China)

  • Wang Xiang

    (MOE Key Laboratory for Urban Transportation Complex Systems Theory and Technology, Beijing Jiaotong University, Beijing 100044, China)

  • Man Zhang

    (MOE Key Laboratory for Urban Transportation Complex Systems Theory and Technology, Beijing Jiaotong University, Beijing 100044, China)

Abstract

Concentrations of four typical heavy metals (Cu; Zn; Cd and Pb) in roadside soils close to three lakes in the Tibetan Plateau were investigated in this study. The hierarchical tree-based regression method was applied to classify concentrations of the heavy metals and analyze their potential influencing factors. It was found that the Tibetan Plateau meadow soils with higher content of sand lead to higher concentrations of Cu; Zn and Pb. The concentrations of Cd and Pb increase with road traffic volume; and for the road segments with higher traffic volume; the Cd and Pb concentrations significantly decrease with the roadside distance. Additionally; the concentrations of Zn and Pb increase as the altitude of sampling site increases. Furthermore; the Hakanson potential ecological risk index method was used to assess the contamination degree of the heavy metals for the study regions. The results show that accumulations of Cu; Zn and Pb in roadside soils remain an unpolluted level at all sites. However; the Cd indices in the regions with higher traffic volume have reached a strong potential ecological risk level; and some spots with peak concentrations have even been severely polluted due to traffic activities.

Suggested Citation

  • Xuedong Yan & Fan Zhang & Dan Gao & Chen Zeng & Wang Xiang & Man Zhang, 2013. "Accumulations of Heavy Metals in Roadside Soils Close to Zhaling, Eling and Nam Co Lakes in the Tibetan Plateau," IJERPH, MDPI, vol. 10(6), pages 1-17, June.
    • Handle: RePEc:gam:jijerp:v:10:y:2013:i:6:p:2384-2400:d:26322
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    References listed on IDEAS

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    1. Fan Zhang & Xuedong Yan & Chen Zeng & Man Zhang & Suraj Shrestha & Lochan Prasad Devkota & Tandong Yao, 2012. "Influence of Traffic Activity on Heavy Metal Concentrations of Roadside Farmland Soil in Mountainous Areas," IJERPH, MDPI, vol. 9(5), pages 1-17, May.
    2. G. V. Kass, 1980. "An Exploratory Technique for Investigating Large Quantities of Categorical Data," Journal of the Royal Statistical Society Series C, Royal Statistical Society, vol. 29(2), pages 119-127, June.
    3. Bai, Junhong & Cui, Baoshan & Chen, Bin & Zhang, Kejiang & Deng, Wei & Gao, Haifeng & Xiao, Rong, 2011. "Spatial distribution and ecological risk assessment of heavy metals in surface sediments from a typical plateau lake wetland, China," Ecological Modelling, Elsevier, vol. 222(2), pages 301-306.
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    Cited by:

    1. Guanxing Wang & Xuedong Yan & Fan Zhang & Chen Zeng & Dan Gao, 2013. "Traffic-Related Trace Element Accumulation in Roadside Soils and Wild Grasses in the Qinghai-Tibet Plateau, China," IJERPH, MDPI, vol. 11(1), pages 1-17, December.
    2. Yun Wang & Xuedong Yan & Yu Zhou & Qingwan Xue & Li Sun, 2017. "Individuals’ Acceptance to Free-Floating Electric Carsharing Mode: A Web-Based Survey in China," IJERPH, MDPI, vol. 14(5), pages 1-24, May.

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