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Characteristics of Some Heavy Metals in Acid Sulfate Topsoils, Eastern Australia

Pedosphere 2001年第1期11卷 31-37页

作者： C. LIN, D. MCCONCHIE, R. T. BUSH, L. A. SULLIVAN and M. ROSICKY (School of Resource Science and Management, Southern Cross University, Lismore, NSW (Australia)) Southern Cross University 澳大利亚

Forty-five acid sulfate topsoil samples (depth < 0.5 m) from 15 soil cores at 11 locations along the New South Wales coast, Australia, were selected to investigate the chemical behavior of Zn, Mn, Cr, Co and Pb in the... 详细信息

Forty-five acid sulfate topsoil samples (depth ph-dependency.of soluble Zn and Mn was strongly affected by the availability of acid reactive Zn and Mn compounds. There were fairly good relationships between soluble Zn and acid reactive Zn compounds, and between soluble Mn and acid reactive Mn compounds. Soluble Zn and soluble Mn concentrations were important controls on exchangeable Zn and Mn concentrations, respectively. In contrast to the suggestion by other authors that adsorption of Co was closely associated with Mn oxides present in soils, the exchangeable Co in the investigated acid sulfate soils was not clearly related to the abundance of Mn minerals. In addition to the fact that there are few Mn minerals present in the soils, this might also be because the availability of canon exchange sites on the crystal surfaces of Mn oxides was reduced under extremely acidic conditions.

关键词： acid sulfate soil heavy metal ph-dependency.

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