Influence of soil copper content on the kinetics of thiram adsorption and on thiram leachability from soils

► Soil copper content has a marked effect on the sorption process of thiram onto soil. ► Reactions of thiram with copper ions in soil occur. ► Reaction extension during adsorption may be strongly dependent on the Cu:Thi ratio. ► The persistence of thiram residues increases with soil copper content. ► Thiram is not easily leached and copper may contribute to its soil immobilization.