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Competitive Sorption of Cadmium and Lead in Acid Soils of Central Spain.

DE2005836041

Publication Date	2005
Page Count	38
Abstract	The bioavailability and ultimate fate of heavy metals in the environment are controlled by chemical sorption. To assess competitive sorption of Pb and Cd, batch equilibrium experiments (generating sorption isotherms) and kinetics sorption studies were performed using single and binary metal solutions in surface samples of four soils from central Spain. For comparisons between soils, as well as, single and binary metal solutions, soil chemical processes were characterized using the Langmuir equation, ionic strength, and an empirical power function for kinetic sorption. In addition, soil pH and clay mineralogy were used to explain observed sorption processes. Sorption isotherms were well described by the Langmuir equation and the sorption kinetics were well described by an empirical power function within the reaction times in this study.
Keywords	Soils Sorption Cadmium Lead(Metal) Foreign countries Isotherms Acid soils Competitive sorption Kinetics Spain Heavy metals
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Lawrence Berkeley National Lab., CA.; Department of Energy, Washington, DC.; Centro de Ciencias Medioambientales, Madrid (Spain).
Supplemental Notes	Prepared in cooperation with Centro de Ciencias Medioambientales, Madrid (Spain). Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200520

Competitive Sorption of Cadmium and Lead in Acid Soils of Central Spain.

Competitive Sorption of Cadmium and Lead in Acid Soils of Central Spain.
DE2005836041

Publication Date	2005
Page Count	38
Abstract	The bioavailability and ultimate fate of heavy metals in the environment are controlled by chemical sorption. To assess competitive sorption of Pb and Cd, batch equilibrium experiments (generating sorption isotherms) and kinetics sorption studies were performed using single and binary metal solutions in surface samples of four soils from central Spain. For comparisons between soils, as well as, single and binary metal solutions, soil chemical processes were characterized using the Langmuir equation, ionic strength, and an empirical power function for kinetic sorption. In addition, soil pH and clay mineralogy were used to explain observed sorption processes. Sorption isotherms were well described by the Langmuir equation and the sorption kinetics were well described by an empirical power function within the reaction times in this study.
Keywords	Soils Sorption Cadmium Lead(Metal) Foreign countries Isotherms Acid soils Competitive sorption Kinetics Spain Heavy metals
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Lawrence Berkeley National Lab., CA.; Department of Energy, Washington, DC.; Centro de Ciencias Medioambientales, Madrid (Spain).
Supplemental Notes	Prepared in cooperation with Centro de Ciencias Medioambientales, Madrid (Spain). Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200520