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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/24723
Title: A comparative adsorption kinetic modeling of fluoride adsorption by nanoparticles and its polymeric nanocomposite
Authors: Chaudhary M.
Jain N.
Maiti, Abhijit
Published in: Journal of Environmental Chemical Engineering
Abstract: Nanoparticles (NPs) of metallic oxides/hydroxides (oxyhydroxide) are highly efficient adsorbents for pollutants but tend to agglomerate readily. So, in recent years, NPs have been embedded inside the porous polymeric matrix to decontaminate pollutants more efficiently than NPs alone. But the roles of the polymeric barrier on the performance of composite adsorbent have not been explored in literature. In the present study, diffusivity coefficients (De) of fluoride ions (F-) for adsorbents mixed metal oxyhydroxides and nanocomposite were estimated using a kinetic model to understand the roles of the polymeric barrier on adsorbate diffusion from the external surface to interior pores of the nanocomposite. Adsorption kinetic modeling study of both adsorbent-F- systems reveals that Fe-Al-Mn@chitosan composite is a more efficient adsorbent than mixed metal oxide nanoparticles alone. Although, the mass fraction of metal oxides/hydroxide present in the polymeric composite is less. The kinetic model reveals that only 25% of adsorption front radius was accessible for the adsorption of fluoride ions in mixed metal oxyhydroxide (Fe-Al-Mn) NPs. But, More than 80% of the total adsorption front radius was accessible for Fe-Al-Mn@chitosan. The magnitude of De is found to be almost in the same order for both the adsorbents, proving that polymer layers in Fe-Al-Mn@chitosan composite provide minimum resistance to the internal pore diffusion of adsorbate ions from the external surface to interior pores. © 2021 Elsevier Ltd
Citation: Journal of Environmental Chemical Engineering, 9(5)
URI: https://doi.org/10.1016/j.jece.2021.105595
http://repository.iitr.ac.in/handle/123456789/24723
Issue Date: 2021
Publisher: Elsevier Ltd
Keywords: Composite adsorbent
Estimation of pore diffusivity
Fluoride removal
Polymer-coated adsorbent
Pore diffusion through polymeric matrix
Removal kinetics
ISSN: 22133437
Author Scopus IDs: 57190226557
57210732499
23994098600
Author Affiliations: Chaudhary, M., Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Saharanpur Campus, Saharanpur, Uttar Pradesh 247001, India
Jain, N., Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Saharanpur Campus, Saharanpur, Uttar Pradesh 247001, India
Maiti, A., Department of Polymer and Process Engineering, Indian Institute of Technology Roorkee, Saharanpur Campus, Saharanpur, Uttar Pradesh 247001, India
Funding Details: This research work has been funded by the Science & Engineering Research Board, Department of Science Technology, Government of India , through IMPRINT 2A project scheme (File number IMP/2018/001228 ). Department of Science and Technology, Ministry of Science and Technology, India, डीएसटी: IMP/2018/001228; Science and Engineering Research Board, SERB
Corresponding Author: Maiti, A.; Department of Polymer and Process Engineering, Saharanpur Campus, India; email: abhijit.maiti@pe.iitr.ac.in
Appears in Collections:Journal Publications [PE]

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