Freundlich adsorption equations for cadmium, copper and zinc in soil based on literature data
Freundlich-adsorptievergelijkingen voor cadmium, koper en zink in de bodem op basis van literatuurgegevens
26 May 2012, PDF |
136, annex: 76 pages |
Elzinga EJ, van den Berg B, van Grinsven JJM, Swartjes FA, Vissenberg HA
RIVM Report 711501001
Freundlich equations (Freundlich isotherms) were derived for the three heavy metals, cadmium, copper and zinc, by regression in an extensive literature data set. The Freundlich constants were described as a function of such soil characteristics as pH, CEC and organic matter content. Freundlich isotherms were derived using both the total concentration in solution and the activity of the free metal ions in solution. The Freundlich isotherms were applied to field data for 20 Dutch soils. In general, the isotherms seem to underestimate measured values. The isotherms may provide a supplement to presently available partition data sets for estimating mobility and bioavailability of metals in soils.