Binary biopolymeric beads of alginate and carboxymethyl cellulose as potential adsorbent for removal of cobalt (II) ions: A dynamic and equilibrium study

Abstract

Static and dynamic adsorption studies of Co (II) ions have been undertaken at fixed pH and ionic strength taking binary biopolymeric beads of cross-linked calcium alginate and carboxy methylcellulose as biosorbents. The adsorption data were applied to Langmuir and Freundlich isotherm equations and various static parameters were calculated. The dynamic nature of adsorption process was quantified in terms of several kinetic constants such as rate constants for adsorption (K) and Lagergreen rate constant (K _ad). The influence of various experimental parameters such as solid-to-liquid ratio, pH, and temperature, the presence of salts and chemical composition of biopolymeric beads were investigated on the adsorption of cobalt ions.

Keywords:

• adsorption isotherms
• carboxy methylcellulose
• calcium alginate
• immobilization
• metal ions