ADSORPTION BEHAVIOUR OF DEXTRIN ONTO ACTIVATED OYSTER SHELL

C. I. O. Kamalu, P. Oghome, K. N. Nwaigwe, E. E. Anyanwu

Abstract: The effect of initial dextrin concentration, contact time, pH, temperature and added calcium ion on the adsorption behaviour of dextrin onto oyster shell is investigated. The results obtained show that increase in concentration and temperature below the boiling point of dextrin enhances the adsorption process. It was found in this study that adsorption density varies with pH and is maximum within the range of 2 to 7. The plot of amount of dextrin adsorbed against the concentration of the adsorbate was hyperbolic which conforms to Legmir isotherm. The free energy of dextrin oyster shell adsorption system was found to be 13.23kg/mol and the specific area of the oyster shell for this work was 70.8m 2 /g

Keywords: Adsorption, dextrin, oyster shell, behaviour, crushing, drying

DOI: https://doi.org/10.15623/ijret.2015.0403004