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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/2028
Title: Simultaneous co-adsorptive removal of phenol and cyanide from binary solution using granular activated carbon
Authors: Agarwal B.
Balomajumder C.
Thakur P.K.
Published in: Chemical Engineering Journal
Abstract: The present study deals with the equilibrium, kinetic and thermodynamic modeling of simultaneous co-adsorption of phenol and cyanide from binary solution onto Granular Activated Carbon (GAC). The effect of process parameters like pH, temperature, adsorbent dose and contact time on the adsorptive efficiency has been evaluated. At an optimum pH 8, temperature 30°C and adsorbent dose of 30g/L, 79.9% of 200mg/L phenol and 93.6% of 20mg/L cyanide were removed. Four multicomponent isotherms were applied to the experimental data conducted at an initial concentration range of 100-1000mg/L. Single component isotherms viz. Langmuir and Freundlich were applied to determine the multicomponent isotherm parameters. It was found that phenol adsorption followed extended Langmuir isotherm while cyanide adsorption followed extended Freundlich isotherm in multicomponent system. The monolayer adsorption capacity of GAC was found to be 269.7 and 1.95mg/g for phenol and cyanide, respectively as calculated by extended Langmuir isotherm. Adsorption of phenol and cyanide followed pseudo-second order kinetics indicating chemisorption to be the mechanism of adsorption. Thermodynamic parameters viz., ?G0, ?H0 and ?S0 were -3.5174KJ/mol, -10.326KJ/mol, -0.0225KJ/mol-K for phenol and -6.5575KJ/mol, 14.044KJ/mol and 0.0679KJ/mol-K for cyanide adsorption, respectively. Thermodynamic studies established the process of phenol adsorption onto GAC as exothermic and spontaneous in nature while of cyanide as endothermic in nature. © 2013 Elsevier B.V.
Citation: Chemical Engineering Journal(2013), 228(): 655-664
URI: https://doi.org/10.1016/j.cej.2013.05.030
http://repository.iitr.ac.in/handle/123456789/2028
Issue Date: 2013
Keywords: Adsorption
Cyanide
Isotherms
Kinetics
Multicomponent
Phenol
ISSN: 13858947
Author Scopus IDs: 57214017824
35615087500
55615154600
Author Affiliations: Agarwal, B., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, India
Balomajumder, C., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, India
Thakur, P.K., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, India
Funding Details: The authors are thankful to Ministry of Human Resource Development, Government of India and Institute’s Instrumentation Center, IIT Roorkee for extending their financial and technical support for present research work.
Corresponding Author: Agarwal, B.; Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, India; email: bhumica.agarwal@gmail.com
Appears in Collections:Journal Publications [CH]

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