Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6302140 | Ecological Engineering | 2014 | 6 Pages |
Abstract
Biosorption of Cr(VI) onto date pit biomass has been investigated via kinetic studies as functions of initial Cr(VI) concentration, solution temperature and date pit particle size. Kinetic experiments indicated that chromate ions accumulate onto the date pits and then reduce to less toxic Cr(III) compounds. The López-GarcÃa, Escudero and Park Cr(VI) biosorption kinetic models, which take into consideration the direct reduction, the passivation process and the follow-on decrease of the active surface area of reaction, were applied to the kinetic data. The models represented the experimental data accurately at low Cr(VI) concentration (0.480Â mM) and small particle size (0.11-0.22Â mm) at which the Cr(VI) was completely removed from the aqueous solution and completely reduced to Cr(III) after 420Â min. Date pit biomass thus offers a green chemical process for the remediation of chromium from wastewater. This investigation will help researchers employ the adsorption-coupled reduction of Cr(VI) models and simplify their application to kinetic experimental data.
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Authors
Ahmad B. Albadarin, Yoann Glocheux, M.N.M. Ahmad, Gavin M. Walker, Chirangano Mangwandi,