Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2017, Vol. 33 ›› Issue (19): 93-100.doi: 10.11924/j.issn.1000-6850.casb17030167

Special Issue: 土壤重金属污染

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Distribution Characteristics and Correlations of Heavy Metals in Contaminated Farmland Soils in Yuebei Mining Area

Jiao Hongpeng, Zhu Huangrong, Jiang Haiyan, Chen Yagang, Feng Xiancui, Zhao Qiuxiang   

  1. (Guangdong Province Research Center for Geoanlysis, Guangzhou 510080)
  • Received:2017-03-25 Revised:2017-05-31 Accepted:2017-05-02 Online:2017-07-11 Published:2017-07-11

Abstract: To understand the contamination status of the survey area and provide a scientific basis for soil restoration in Yuebei mining area, 144 surface soil samples were collected by using systematic grid sampling method, and the test data of soil samples were analyzed by single factor pollution index method, comprehensive pollution index method and correlation analysis etc. The results showed that: the contents of heavy metals Cd, Zn, Ni, Pb exceeded the standard rate by 100%, 96.53%, 6.25%, 3.00%, respectively; the Cd and Zn single pollution index in soil were 3.59 and 1.90, indicating that the land was polluted by two kinds of heavy metals, in which Cd pollution was most serious; however, the single pollution index of Pb, Ni and Cu were less than 0.7, indicating that the pollution degree was within the safe range; thereinto, the correlation between available and total heavy metals Cd, Pb and Zn in soil reached the extremely strong level; the correlation coefficient of Pb in soil was the highest (0.9851), followed by that of Zn (0.9197) and Cd (0.8994), indicating that Cd, Pb and Zn were easily transported in soil, and the potential ecological pollution risk was high; additionally, the correlation between available and total heavy metals Cu and Ni also reached a strong level, and their migration ability in soil could not be ignored.