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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/20210
Title: Sulphide Removal from Water Through Electrocoagulation: Kinetics, Equilibrium and Thermodynamic Analysis
Authors: Shankar R.
Sharan S.
Varma A.K.
Mondal, Prasenjit
Chand S.
Thakur L.S.
Pande P.P.
Yadav V.K.
Published in: Journal of The Institution of Engineers (India): Series A
Abstract: The current study covers the effect of operating parameters on electrocoagulation (EC) process with Al and Fe electrodes in terms of sulphide reduction. Maximum sulphide reductions of 82% and 87% were noted for Al and Fe electrodes, at optimum operating conditions for initial concentration of 600 mg/L. The sulphide removal mechanism of both electrodes was validated using Langmuir, Freundlich, Hill, Temkin, Elovich and Jossens isotherm models. The Langmuir adsorption isotherm suggests the best fitting with coefficient of regression (R2) of 0.996 and 0.997 for both electrodes, respectively, suggesting monolayer coverage of adsorbed molecules. The kinetic study suggests that the adsorption mechanism during EC process follows second-order kinetics for both electrodes. The thermodynamic study showed that the adsorption of sulphide onto hydroxide formed during EC process was feasible, spontaneous and endothermic in the temperature range of 15–40 °C. The heat of enthalpy during EC process was 41.319 and 50.878 kJ/mol for both electrodes and standard Gibb’s free energy was 4.203 and 3.946 kJ/mol for both electrodes at 25 °C temperature. The activation energy for Al and Fe electrodes was 22.315 and 44.846 kJ/mol, indicating domination of activated chemisorption phenomena during EC process. © 2021, The Institution of Engineers (India).
Citation: Journal of The Institution of Engineers (India): Series A, 102(2): 603-621
URI: https://doi.org/10.1007/s40030-021-00536-x
http://repository.iitr.ac.in/handle/123456789/20210
Issue Date: 2021
Publisher: Springer
Keywords: Activation energy
Adsorption
Isotherm
Kinetic study
Sulphide
ISSN: 22502149
Author Scopus IDs: 57207977725
57194155964
57196232507
57200197409
7102245914
56514970500
36849961200
57225451867
Author Affiliations: Shankar, R., Department of Chemical Engineering, Madan Mohan Malaviya University of Technology, Gorakhpur, Uttar Pradesh 273010, India
Sharan, S., Department of Chemical Engineering, Madan Mohan Malaviya University of Technology, Gorakhpur, Uttar Pradesh 273010, India, Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
Varma, A.K., Department of Chemical Engineering, Assam Energy Institute (A Centre of RGIPT, Jais, Amethi), Sivasagar, Assam 785697, India
Mondal, P., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
Chand, S., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
Thakur, L.S., Department of Chemical Engineering, Ujjain Engineering College, Ujjain, Madhya Pradesh 456006, India
Pande, P.P., Department of Chemistry and Environmental Sciences, Madan Mohan Malaviya University of Technology, Gorakhpur, Uttar Pradesh 273010, India
Yadav, V.K., Department of Chemical Engineering, Government Polytechnic, Gorakhpur, Uttar Pradesh 203015, India
Corresponding Author: Shankar, R.; Department of Chemical Engineering, India; email: bits.iitr@gmail.com
Appears in Collections:Journal Publications [BT]

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