Comparison of different methods for generating desorption isotherms of Cd and Pb in two soils of different contaminant loading

摘要：

Desorption isotherms describe the partitioning of metals between the soil solid and solution and provide basic information for rhizosphere modelling. This study was conducted to compare different methods for examination of the Cd and Pb desorption behavior in two contaminated, calcareous top soils. Desorption isotherms of Cd and Pb showed mainly irregular parabolic and sigmoidal shape in the moderately contaminated soil. Artefacts due to breakdown of soil microaggregates in batch experiments were charged for introduction of new sorption surfaces and, hence, varying steady state conditions of the system. Observed effects are challenging the suitability of desorption isotherms performed by batch experiments with soils of high aggregate stability and/or low loading of the target element.

关键词： Desorption isotherm cadmium lead artefacts breakdown of microaggregates

作者: Unterbrunner R Puschenreiter M Merten F Oburger E Garcia Garcia H Wieshammer G Swoboda S Wenzel W W

作者单位: Department of Forest and Soil Sciences, University of Natural Resources and Applied Life Sciences Vienna, Peter-Jordan Strasse 82, A-1190 Vienna, Austria

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: 671-672

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）