Abstract

Nelson R. Villarante¹, Angelo Patrick R. Bautista¹ and Derick Erl P. Sumalapao^2,3,4

DOI : http://dx.doi.org/10.13005/ojc/330307

Batch adsorption of toxic Cr(VI) ion from an aqueous solution using lumbang (Aleurites moluccana) activated carbon-chitosan composite crosslinked with epichlorohydrin as an adsorbent was investigated. The adsorption experiments were performed at varying pH, agitation time, initial Cr(VI) ion concentration, temperature, and adsorbent dose. At an initial concentration of 60 ppm Cr(VI), the maximum adsorption was observed at pH 3, adsorbent dose of 3 g/L, contact time of 75 min, and temperature of 30^oC. Analysis of the experimental data using different kinetic models revealed that the biosorption phenomenon behaved under a pseudo second-order rate mechanism.

Biosorption; Aleurites moluccana; Chromium; Kinetics; Carbon-chitosan composite; Epichlorohydrin

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