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Published in:
2013 | OriginalPaper | Chapter
Effect of Biochars on Adsorption of Cu(II), Pb(II) and Cd(II) by an Oxisol from Hainan, China
Authors : Renkou Xu, Anzhen Zhao, M. M. Masud
Published in: Functions of Natural Organic Matter in Changing Environment
Publisher: Springer Netherlands
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Abstract
The biochars were prepared from the straws of canola and peanut using an oxygen-limited pyrolysis method at 350°C. The effect of biochars on adsorption of Cu(II), Pb(II) and Cd(II) by an Oxisol from Hainan, China, was investigated. Results indicated that incorporation of biochars increased the adsorption of Cu(II), Pb(II) and Cd(II) by the soil and peanut straw char induced more increase in the adsorption of three metals. The increased percentage for Cd(II) adsorption induced by biochars was much greater than that for the adsorption of Cu(II) and Pb(II). Biochars increased metal adsorption by the variable charge soil through electrostatic and non-electrostatic mechanisms; the relative contribution of the two mechanisms varied with metals and biochars.