JOURNAL OF NATURAL RESOURCES ›› 2016, Vol. 31 ›› Issue (2): 310-320.doi: 10.11849/zrzyxb.20141565

• Resource Evaluation • Previous Articles     Next Articles

Determination of Heavy Metal Baseline in Baotou and Bayan Obo and Its Application in the Assessment of Heavy Metal Contamination

ZHU Xiao-dong1, 2, 3, WEI Chao-yang1, 2, YANG Fen1, 2, 3   

  1. 1.Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 10010, China;
    2. Key Laboratory of Land Surface Pattern and Simulation, CAS, Beijing 100101, China;
    3. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2014-11-27 Online:2016-02-25 Published:2016-02-25
  • Supported by:
    National Science and Technology Support Program in the 12th Five-Year Plan of China, No.2012BAJ24B03

Abstract: Based on the principle of geochemical baseline, the baseline values of six heavy metals, including As, Cr, Cu, Ni, Pb and Zn in Baotou city and Bayan Bbo mining area were determined with reference element method and cumulative frequency curve method. Baseline with reference element method was, at Baotou: 8.85 mg/kg As, 123.15 mg/kg Cr, 24.61 mg/kg Cu, 19.72 mg/kg Ni, 27.39 mg/kg Pb and 74.25 mg/kg Zn; at Bayan Obo: 16.16 mg/kg As, 127.17 mg/kg Cr, 31.07 mg/kg Cu, 28.94 mg/kg Ni, 33.82 mg/kg Pb and 80.52 mg/kg Zn. Baseline with cumulative frequency curve method was, at Baotou : 8.45 mg/kg As, 113.78 mg/kg Cr, 16.12 mg/kg Cu, 16.23 mg/kg Ni, 19.66 mg/kg Pb and 48.59 mg/kg Zn; Bayan Obo: 16.01 mg/kg As, 121.56 mg/kg Cr, 21.85 mg/kg Cu, 29.37 mg/kg Ni, 24.32 mg/kg Pb and 72.89 mg/kg Zn. Generally, the baseline values of Bayan Obo was higher than those in Baotou. The contamination of various heavy metals in Baotou and Bayan Obo were assessed using single-factor contamination index. When the background values of Inner Mongolia were used as the references, the numbers of none, slight, mild and moderate contaminated samples in Bayan Obo were 0.3, 1.0, 1.5 and 1.7 times of those in Baotou, indicating the contamination in Bayan Obo was higher than in Baotou. However, when baseline values were used as the references, the numbers of none, slight, mild and moderate contaminated samples in Bayan Obo were 1.0, 1.1, 0.7 and 0.5 times of those in Baotou. Since both areas had small numbers of moderately contaminated samples, no significant differences between Baotou and Bayan Obo was actually seen at contaminative levels. Assessment of the contamination of heavy metals in these two areas using the baselines reflected reasonable contributions of human activities, whereas using background values of Inner Mongolia gave rise to distorted recognition of such contributions.

CLC Number: 

  • X825