Journal of Coastal Zone Management

Abstract

Adsorption of Mg(Ii) Ion from Aqueous Solution on Chitosan Beads and Chitosan Powder

Sari Edi Cahyaningrum, Narsito, Sri Juari Santoso and Rudiana Agustini

A basic investigation on the removal of Mg(II) ion from aqueous solution by chitosan beads was
conducted in a batch adsorption system. The influence of different experimental parameters; pH,
agitation period and different concentration of Mg(II) ion was evaluated. A pH 7.0 was found to be an
optimum pH for Mg(II) adsorption onto chitosan powder and chitosan beads. The Langmuir and
Freundlich adsorption isotherm models were applied to describe the isotherms and isotherm constants
for the adsorption of Mg(II) onto chitosan powder and chitosan beads. Results indicated that Mg(II)
uptake could be described by the Langmuir adsorption model. The maximum adsorption capacities of
Mg(II) ion onto chitosan powder and chitosan beads were 7.20 and 17.39 mol g−1, respectively. The
rate of adsorption Mg(II) on chitosan powder and chitosan beads were 16.0.10-4 min-1 and 48.00 . 10-4
min-1, respectively.