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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/1980
Title: Application of response surface methodology for the optimization of Ni2+ ions biosorption from aqueous solution using Sargassum filipendula
Authors: Verma A.
Kumar S.
Balomajumder C.
Published in: Desalination and Water Treatment
Abstract: All the experiments were performed in batch mode for biosorption of Ni2+ ions from aqueous solution using Sargassum filipendula. All the process parameters of Ni2+ ions biosorption was optimized by using response surface methodology. The effect of four independent variables temperature (20°C–40°C), pH (3–6), initial Ni2+ ions concentration (50–150 mg/L) and biosorbent dosage (1.0–2.5 g/L) on biosorption of Ni2+ ions were studied. The biosorbent was characterized by using Fourier transform infrared spectroscopy, field emission electron microscopy, and energy dispersive X-ray spectroscopy. The optimized values of four variables were found as temperature of 41.5°C, initial Ni2+ ions concentration of 83.18 mg/L, biosorbent dosage of 1.97 g/L and pH of 5.4 which resulted in 68.45% removal of Ni2+ ions. The Redlich–Peterson isotherm model was found to be the best fitted to experimental data of Ni2+ ions biosorption with higher value of R2 and smaller value of ?q%. The best fitted kinetic model was noticed as pseudo-first-order kinetic model (R2 > 0.98) which shows that the rate limiting step was physisorption. Thermodynamic parameters (?G° = –0.097 to –4.060 kJ/mol, ?H° = 79.175 J/mol, ?S° = 0.270 J/mol K) of Ni2+ ions biosorption showed that the process was spontaneous, feasible and endothermic in nature. The biosorption and desorption efficiency were decreased up to 8.5% and 12%, respectively after four successive cycles. Therefore, the present study demonstrated that S. filipendula can be used as biosorbent for Ni2+ ions biosorption from the synthetic wastewater effectively and economically. © 2019 Desalination Publications. All rights reserved.
Citation: Desalination and Water Treatment(2019), 170(): 239-252
URI: https://doi.org/10.5004/dwt.2019.24725
http://repository.iitr.ac.in/handle/123456789/1980
Issue Date: 2019
Publisher: Desalination Publications
Keywords: Biosorption
Isotherms
Kinetics
Nickel
Response surface methodology
Thermodynamics
ISSN: 19443994
Author Scopus IDs: 57192379479
57209548014
35615087500
Author Affiliations: Verma, A., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247 667, India
Kumar, S., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247 667, India
Balomajumder, C., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247 667, India
Funding Details: The authors would like to acknowledge Ministry of Human Resource Development, Government of India for the financial support and Indian Institute of Technology Roorkee for providing instruments.
Corresponding Author: Verma, A.; Department of Chemical Engineering, Indian Institute of Technology RoorkeeIndia; email: ayushi.mtech@gmail.com
Appears in Collections:Journal Publications [CH]

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