In meltwater derived from the Moiry Glacier (Switzerland), sorption of major cations on suspended sediments can be a significant factor in chemical transport. In meq/100 g, especially for calcium and potassium, sorption on suspended particles is more important in the waters resulting from percolation through morainic deposits than in subglacial waters. Sorption of major cations should not be neglected, either in quantitative studies of chemical denudation or in studies related to the glacial melt-water environment.