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Adsorption isotherm and kinetic studies of hexavalent chromium removal from aqueous solution onto bone char
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Land and Water Resources Engineering.
2015 (English)In: Journal of Environmental Chemical Engineering, ISSN 2213-3437, Vol. 3, no 2, 1329-1336 p.Article in journal (Refereed) Published
Abstract [en]

The adsorption of hexavalent chromium [Cr(VI)] onto bone char was optimized as a function of pH, initial Cr(VI) concentration, and bone char dosage using aqueous solution in batch tests. The initial Cr(VI) concentrations were varied between 5 and 800 mg/L to investigate equilibrium, kinetics, and the adsorption isotherms. About 100% of Cr(VI) was removed at initial pH of 1.0 with initial Cr(VI) concentration of 10 mg/L, using 2 g of bone char after 2 h. The maximum adsorption capacity of the bone char was 4.8 mg/g for an initial Cr(VI) concentration of 800 mg/L. The adsorption kinetics of Cr(VI) onto bone char followed a second order kinetic model. The adsorption isotherm followed the Langmuir model for Cr(VI) adsorption. In general, bone char demonstrated promising results as an effective adsorbent for removal of Cr(VI) from the aqueous solution. The results from this study could be useful in designing a filtration unit with bone char as the adsorbent in a full-scale water and wastewater treatment plant for the removal of Cr(VI) from contaminated water.

Place, publisher, year, edition, pages
Elsevier, 2015. Vol. 3, no 2, 1329-1336 p.
Keyword [en]
Adsorption, Bone char, Equilibrium concentration, Isotherms, Reaction kinetics, Adsorption isotherms, Bone, Chemicals removal (water treatment), Chromium, Chromium compounds, Kinetic theory, Kinetics, Solutions, Wastewater treatment, Water filtration, Water pollution, Adsorption capacities, Adsorption kinetics, Hexavalent chromium, Hexavalent chromium removals, Second order kinetics, Water and wastewater treatments
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-175035DOI: 10.1016/j.jece.2014.12.005ScopusID: 2-s2.0-84937525835OAI: oai:DiVA.org:kth-175035DiVA: diva2:881671
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QC 20151211

Available from: 2015-12-11 Created: 2015-10-09 Last updated: 2015-12-11Bibliographically approved

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Hyder, A. H. M. Golam
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