Abstract
Several kinds of spherical cysteine grafted cobalt/manganese imprinted crosslinking chitosan spheres were synthesized for Mn2+ and Co2+ removal, in which Mn2+ and Co2+ were used separately or together as imprinting ions. Structures of the adsorbents were analyzed utilizing the techniques of SEM and FTIR. The effects of initial pH, contact time, presence of other cations, initial Mn2+ and Co2+ concentration on adsorption were investigated. Furthermore, adsorption kinetics and isotherm were studied, which showed sorption data fitted to pseudo-second-order and Langmuir models for both Mn2+ and Co2+. The overall results indicated the possibility of using Cys–Co/Mn–CCTS–2 for efficient removal of Mn2+ and Co2+ from dilute low-level radioactive liquid waste.
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