Pedosphere 11(2): 137--142, 2001
ISSN 1002-0160/CN 32-1315/P
©2001 Soil Science Society of China
Published by Elsevier B.V. and Science Press
Heavy metal runoff in relation to soil characteristics
ZHAO Xiu-Lan, QING Chang-Le and WEI Shi-Qiang
College of Resources and Environmental Science, Southwest Agricultural University, Chongqing 400716 (china)
      Cu, Zn, Pb and Hg runoff from yellow limestone soil and purple soils and the relationships between the mobility of the heavy metals and the soil characteristics were studied in laboratory using a rainfall simulator. The results showed that the concentrations of soluble Zn in surface runoff were significantly negatively correlated with the contents of < 0.002 mm particles and CEC of the soils, indicating that Zn was mostly adsorbed by clays in the soils. The contents of Cu and Hg in surface runoff were positively related to their contents in the soils. The amounts of Cu, Zn, Pb and Hg removed by surface runoff were influenced by the amounts of soil and water losses and their contents in the soils, and were closely related to the contents of soil particles 1~0.02 mm in size.
Key Words:  heavy metal, mobility, soil characteristics, surface runoff
Citation: Zhao, X. L., Qing, C. L. and Wei, S. Q. 2001. Heavy metal runoff in relation to soil characteristics. Pedosphere. 11(2): 137-142.
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