Sorption of Cadmium by Calcareous Soils: Influence of Solution Composition1
- G. A. O'Connor,
- Candice O'Connor and
- G. R. Cline2
Cadmium sorption-desorption by three Ca-saturated, calcareous soils was studied in the presence of various Ca salts. Cadmium retention was extensive in all soil-solution systems and was best characterized by a two-part Freundlich relationship. Part I of the isotherm was interpreted to represent Cd retention by highly Cd-specific adsorption sites, while part II of the isotherm represented a mixture of highly Cd-specific and nonspecific adsorption sites. This interpretation was supported by desorption data. Differences in Cd sorption from various Ca solutions were at least partially rationalized by considering free Cd2+ activities as predicted by GEOCHEM. Additional consideration, however, must be given to complementary (competing) ion activities.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
Copyright © .