Adsorption studies of caesium on zirconium molybdoarsenate (ZrMAs)

The applicability of zirconium molybdoarsenate (ZrMAs) for efficient removal of Cs from aqueous solution by adsorption has been investigated. The kinetics of adsorption of caesium ions has been studied by using radioanalytical procedure over a concentration range (10−4−10−2 mol dm−3) and in the temperature range (303–318 K). The results showed that the uptake follows the first order rate law with respect to caesium concentration and obeys Langmuir and Modified Freundlich adsorption isotherms in the concentration studied. The effect of temperature on adsorption equilibrium has been studied and the thermodynamic quantities (ΔHo, ΔGo and ΔSo) has been evaluated. They showed that the process is exothermic in nature.