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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/2622
Title: Sorption of Zn(II) ion onto the surface of activated carbon derived from eucalyptus bark saw dust from industrial wastewater: Isotherm, kinetics, mechanistic modeling, and thermodynamics
Authors: Mishra V.
Majumder C.B.
Agarwal, Vijaykumar
Published in: Desalination and Water Treatment
Abstract: The activated carbon was derived from base (0.2 M NaOH)-mediated activation of biomass followed by thermal treatment at 1,123 K. The utmost metal ion uptake capacity and sorption percentage of activated carbon derived from eucalyptus biomass were 1.42 mmol g-1 and 93.42%, respectively. Freundlich isotherm model proved to be superior with higher linear correlation coefficient R2 = 0.96-0.98. Similarly, it was observed that pseudo-second-order reaction model with lower ?2 (0.002703-0.009351) and sum of square errors (0.0001-0.0144) value together with higher R2 (0.98-0.99) ruled in all the possibilities of sorption of Zn(II) ion on activated carbon surface as chemisorption. Bangham's model (R2 = 0.93-0.95) applicability in the present investigation demarcated the fact that the main rate-controlling step in the sorption of Zn(II) ions on activated carbon surface was film diffusion rather than intraparticle diffusion. The results of diffusivity coefficients (Df = 7.16 × 10-6 cm2 s-1) reproduced the analogous viewpoint that film diffusion is quite a dominant step in the biosorption of Zn(II). ?G, ?H, and ?S values obtained through the thermodynamic study of Zn(II) biosorption system were-9798 kJ mol-1, -34.74 kJ mol-1, and -107.63 kJ mol-1 K-1, respectively. © 2012 Desalination Publications. All rights reserved.
Citation: Desalination and Water Treatment (2012), 46(43833): 332-351
URI: https://doi.org/10.1080/19443994.2012.677556
http://repository.iitr.ac.in/handle/123456789/2622
Issue Date: 2012
Publisher: Taylor and Francis Inc.
Keywords: Biosorption
Diffusivity coefficient
Film diffusion
Pseudo-second-order model
Zn(II) ion
ISSN: 19443994
Author Scopus IDs: 35322712800
36793883100
25637008500
Author Affiliations: Mishra, V., Department of Chemical Engineering, Indian Institute of Technology, Roorkee 247667, India
Majumder, C.B., Department of Chemical Engineering, Indian Institute of Technology, Roorkee 247667, India
Agarwal, V.K., Department of Chemical Engineering, Indian Institute of Technology, Roorkee 247667, India
Corresponding Author: Mishra, V.; Department of Chemical Engineering, Indian Institute of Technology, Roorkee 247667, India; email: vishal.biochemical@gmail.com
Appears in Collections:Journal Publications [CH]

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