Sorption of selenite in a multi-component system using the “dialysis membrane” method

► In the present study we examine 75Se sorption on minerals typically found in soils. ► Dialysis membranes were successfully used to assess the minerals competition for Se sorption. ► We conclude that silica release by bentonite dissolution lowers the Se sorption on goethite. ► The results are successfully modelled using a diffuse double layer model constructed with the geochemical code PhreeqC.