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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemical engineering
Removal of chromium(VI) from wastewater by activated carbon developed from Tamarind wood activated with zinc chloride
Chemical Engineering Journal, Volume 150, No. 1, Year 2009
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Description
In this work, the adsorption of chromium(VI) was studied on activated carbon prepared from Tamarind wood with zinc chloride activation. Adsorption studies were conducted in the range of 10-50 mg/l initial chromium(VI) concentration and at temperature in the range of 10-50 °C. The experimental data were analyzed by the Freundlich isotherm and the Langmuir isotherm. Equilibrium data fitted well with the Langmuir model and Freundlich model with maximum adsorption capacity of 28.019 mg/g. The rates of adsorption were found to confirm to pseudo-second-order kinetics with good correlation and the overall rate of chromium(VI) uptake was found to be controlled by pore diffusion, film diffusion and particle diffusion, throughout the entire adsorption period. Boyd plot confirmed that external mass transfer was the rate-limiting step in the adsorption process. Different thermodynamic parameters, viz., ΔH°, ΔS° and ΔG° have also been evaluated and it has been found that the adsorption was feasible, spontaneous and endothermic in nature. The results indicate that the Tamarind wood activated could be used to effectively adsorb chromium(VI) from aqueous solutions. © 2008 Elsevier B.V. All rights reserved.
Authors & Co-Authors
Acharya, Jyotikusum
India, Bhopal
Rajiv Gandhi Technical University
Sahu, J. N.
India, Kharagpur
Indian Institute of Technology Kharagpur
Sahoo, Bigan Kumar
India, Kharagpur
Indian Institute of Technology Kharagpur
Mohanty, Chittaranjan
India, Bhubaneswar
Orissa State Pollution Control Board
Meikap, Bhim Charan
India, Kharagpur
Indian Institute of Technology Kharagpur
Statistics
Citations: 321
Authors: 5
Affiliations: 3
Identifiers
Doi:
10.1016/j.cej.2008.11.035
ISSN:
13858947
Research Areas
Environmental