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Removal of Fluoride from Aqueous Solutions Using Chitosan Cryogels
Joint Authors
Arcos-Arévalo, Anete Jessica
Zavala-Arce, Rosa Elvira
García-Gaitán, Beatriz
García-Rivas, José Luis
Jiménez-Núñez, María de la Luz
Avila-Pérez, Pedro
Source
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-12-28
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
In this study, crosslinked chitosan cryogels (QE) and chitosan’s cryogels modified with iron (QEFe) were synthesized.
They were characterized by BET, PZC, FTIR, and XPS spectroscopies.
Results show a specific surface area of 36.67 and 29.17 m2g−1 and 7.0 and 6.1 of PZC for the cryogels QE and QEFe, respectively.
FTIR results show the characteristic bands of amino and hydroxyl groups, while in the XPS analysis, interactions between iron and oxygen with fluorine were observed.
The removal of fluoride at temperatures of 303, 313, and 323 K in cryogels was tested.
The Ho model is the best fit for the experimental data, suggesting that there is a chemisorption process involved in the removal of fluoride.
The Langmuir-Freundlich model is the best to represent the behavior of the cryogels, and it is used to sorbents with heterogeneous surfaces.
A maximum fluoride adsorption capacity of 280 and 295 mg F−/g for QE and QEFe, respectively, at 303 K was obtained, showing that the removal of fluoride is favored by the iron incorporated in the polymer matrix of the cryogels.
The thermodynamic parameters were obtained for both cryogels, where the values of ΔH° and ΔG° indicate that both systems are endothermic and nonspontaneous.
American Psychological Association (APA)
Arcos-Arévalo, Anete Jessica& Zavala-Arce, Rosa Elvira& Avila-Pérez, Pedro& García-Gaitán, Beatriz& García-Rivas, José Luis& Jiménez-Núñez, María de la Luz. 2016. Removal of Fluoride from Aqueous Solutions Using Chitosan Cryogels. Journal of Chemistry،Vol. 2016, no. 2016, pp.1-13.
https://search.emarefa.net/detail/BIM-1107747
Modern Language Association (MLA)
Arcos-Arévalo, Anete Jessica…[et al.]. Removal of Fluoride from Aqueous Solutions Using Chitosan Cryogels. Journal of Chemistry No. 2016 (2016), pp.1-13.
https://search.emarefa.net/detail/BIM-1107747
American Medical Association (AMA)
Arcos-Arévalo, Anete Jessica& Zavala-Arce, Rosa Elvira& Avila-Pérez, Pedro& García-Gaitán, Beatriz& García-Rivas, José Luis& Jiménez-Núñez, María de la Luz. Removal of Fluoride from Aqueous Solutions Using Chitosan Cryogels. Journal of Chemistry. 2016. Vol. 2016, no. 2016, pp.1-13.
https://search.emarefa.net/detail/BIM-1107747
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1107747