Abstract
The interaction of Cs+ with the different fractions of humic materials (humic acid, fulvic acid, and humin) is studied radiometrically and with an ion-selective electrode (ISE). The results indicate that Cs+ can partially complex humic acid, but not fulvic acid. The uptake of Cs+ by humin is small, and the amount of Cs+ required for saturation is 3.72 (mg metal)/(g humin). The ISE is a suitable tool for measuring the free metal ions remaining after the formation of the metal humate complex.