Metal cations adsorption by an authentic brazilian variable charge soil

摘要：

Adsorption of Cd, Cu, Ni and Zn on surface and subsoil samples from a typical Brazilian variable charge soil was investigated over the pH range from 3 to 8 using two quantitative adsorption parameters: pH50 and proton coefficient (α). A sharp increase of ad sorption density was observed within a very narrow pH range, usually less than two pH units (adsorption edge). The variation in the pH50 values indicated that the identity of the adsorbing ion was a critical factor determining the pH range over which adsorption occurs. As the smaller the pH50, the more selective the adsorbent for the metal and the following affinity sequence was

关键词： adsorption edge heavy metals Kurbatov plots proton coefficient tropical soils

作者: J. C. Casagrande E. R. Mouta M. R. Soares L. C. F. da Silva M. A. Maniero

作者单位: Department of Natural Resources and Environmental Protection, Federal University of Sao Carlos, Arar Department of Biogeochemistry, State University of Sao Paulo, Jaboticabal-SP, 14884-900, Brazil

会议类型: 国际会议

会议名称: 第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)

会议地点: 北京

会议语种:英文

页码: 896-897

在线出版日期: 2007-07-15（万方平台首次上网日期，不代表论文的发表时间）