The adsorption of cadmium by twelve Dutch soils was investigated under widely varying circumstances. The adsorption can be described with the Freundlich equation; the parameters of this equation can be predicted using the properties of the soil (pH, organic carbon and clay content).
The adsorption appeared to be sensitive to the ionic strength , complexation, pH, type of anion which is present and competition of calcium ions in the solution. An emperical equation describing the adsorptive factors mentioned before was derived.
The competition of other heavy metals (Cu, Pb, Zn) appears to be considerable, especially at high metal contents.
Using the estimated parameters the emperical equation gives a good prediction of the adsorption of cadmium by widely differing soils under varying circumstances.
Because of the large influence of the solid phase composition and the environmental conditions on the adsorptive behaviour of cadmium one has to be very careful with basing a regulation for cadmium on the total cadmium content of the soil.
|Qualification||Doctor of Philosophy|
|Award date||17 Feb 1984|
|Place of Publication||Wageningen|
|Publication status||Published - 1984|
- environmental management
- environmental protection
- soil pollution
- soil toxicity