Investigation of Adsorption of Gluconic Acid from Aqueous Solutions by Activated Carbon

Abstract

The separation of gluconic acid from aqueous solutions using
activated carbon was examined. Experiments were carried out in
the system of aqueous gluconic acid solutions (0.75, 1.5, 3, 5 and
8%, w/w) and different amounts of activated carbon (0.001, 0.002,
0.003, 0.004, 0.005, 0.006, 0.007 and 0.008 g) as adsorbent. The
equilibrium distributions of gluconic acid were measured. Adsorption
experiments were carried out at 298 K. The adsorption of
gluconic acid was found to be appreciable in activated carbon. The
percentage removal of gluconic acid was 94.14%. The equilibrium
data fit well within the Freundlich isotherms.