Adsorption behavior and kinetics of exchange of Co²⁺ and Eu³⁺ ions on polymer composite ion exchanger

ABSTRACT

Equilibrium and kinetics of exchange of ⁶⁰Co and ^152+154Eu radionuclides on hydrous titanium oxide incorporated in polyacrylonitrile, TiO-OH-PAN, were studied. The capacities of TiO-OH-PAN for ⁶⁰Co and ^152+154Eu were found to be 2.35 and 2.69 meq/g respectively. Freundlich and Langmiur isotherms were investigated. The validity of the Langmuir isotherm over the specified concentration range indicates monolayer coverage of the surface of TiO-OH-PAN by cobalt and europium. Sorption data was treated with the Dubinin-Radushkevich equation. The results indicated that hydrous titanium oxide incorporated in polyacrylonitrile can be considered as a promising material for removal of cobalt and europium ions from aqueous solution.

KEYWORDS:

• Polymer composite
• ion exchanger
• kinetics
• sorption
• ⁶⁰Co
• ^152+154Eu