Counter ion effect on phosphate sorption

Abstract
Phosphate sorption on the strong basic anion exchanger Amberlite IRA‐400 as a function of the counter ion is presented. The sorption is found to decrease in the order OH>C1>Br> I. Counter ion released / phosphate sorbed ratios indicete that at low concentrations the resin mostly prefers the doubly charged UPO4 2−. The data is explained with the help of a modified Langmuir and mass law action equations.