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Batch, kinetic and equilibrium studies of hexavalent chromium from aqueous phase using Galaxaura Ornate Seaweed

Publication Type : Journal Article

Publisher : International Journal of ChemTech Research

Source : International Journal of ChemTech Research, Sphinx Knowledge House, Volume 8, Issue 4, p.1947-1956 (2015)

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Keywords : adsorbent, adsorbent dosage, adsorption efficiency, analytical parameters, article, biosorption, chromium, contact time, Galaxaura Ornate, isotherm, kinetics, metal ion concentration, nonhuman, pH, seaweed

Campus : Coimbatore

School : School of Engineering

Department : Chemical, Chemistry, Sciences

Year : 2015

Abstract : Batch studies have been carried out to study the feasibility of adsorption of hexavalent chromium onto Galaxaura ornate seaweed. The equilibrium data and biosorption capacity of chromium was determined by varying the pH, dosage of adsorbent, contact time and initial metal ion concentration. The maximum adsorptive capacity was obtained at a pH of 2 at an equilibrium time of 120 minutes. Highest removal efficiency for raw biomass was found to be 71% for hexavalent chromium under optimal conditions. The biosorption isotherms were determined using Langmuir and Freundlich models. Based on the correlation coefficient value it was found that the data fits well both to Langmuir (R2=0.99) and Freundlich adsorption isotherm (R2=0.98) representing monolayer adsorption as well as adsorption on heterogeneous surfaces. The findings of the kinetic study infer that pseudo second order model show a better fit for a wider range of concentrations studied than the pseudo first order kinetics. The results indicate that the identified seaweed has the potential to adsorb chromium (VI) from the aqueous solution. © 2015 Sphinx Knowledge House. All rights reserved.

Cite this Research Publication : Nithya K., Dr. Asha Sathish, Dr. Gangadharan D., Vinaykumar, A., Tharakan, D. M., and Sruthi, B., “Batch, kinetic and equilibrium studies of hexavalent chromium from aqueous phase using Galaxaura Ornate Seaweed”, International Journal of ChemTech Research, vol. 8, no. 4, pp. 1947-1956, 2015

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