| Sorption behaviour of fluoride on carboxylated cross-linked chitosan beads. | |
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MedLine Citation:
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PMID: 18977124 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Carboxylated cross-linked chitosan beads (CCB) showed a significant defluoridation capacity (DC) of 1385 mgF(-)/kg than the raw chitosan beads (CB) which displayed only 52 mgF(-)/kg. Sorption experiments were performed by varying contact time, pH, presence of co-anions and temperature. The nature and morphology of the sorbent were discussed using FTIR and SEM with EDAX analysis. The stability of the beads in solution was explained in terms of swelling ratio of the beads. The fluoride uptake onto CCB obeys both Freundlich and Langmuir isotherms. Thermodynamic studies revealed that the nature of fluoride sorption is spontaneous and endothermic. Sorption kinetics is mainly controlled by pseudo-second-order and intraparticle diffusion models. 0.1M HCl was identified as the best eluent. The suitability of CCB at field conditions has been tested with field sample collected from a nearby fluoride-endemic area. |
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Authors:
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Natrayasamy Viswanathan; C Sairam Sundaram; S Meenakshi |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2008-09-19 |
Journal Detail:
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Title: Colloids and surfaces. B, Biointerfaces Volume: 68 ISSN: 1873-4367 ISO Abbreviation: Colloids Surf B Biointerfaces Publication Date: 2009 Jan |
Date Detail:
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Created Date: 2008-12-01 Completed Date: 2009-04-20 Revised Date: 2009-10-16 |
Medline Journal Info:
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Nlm Unique ID: 9315133 Medline TA: Colloids Surf B Biointerfaces Country: Netherlands |
Other Details:
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Languages: eng Pagination: 48-54 Citation Subset: IM |
Affiliation:
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Department of Chemistry, Gandhigram Rural University, Gandhigram 624302, Tamilnadu, India. natrayasamy_viswanathan@rediffmail.com |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adsorption Chitosan / chemistry* Fluorides / chemistry*, isolation & purification Hydrogen-Ion Concentration Kinetics Microscopy, Electron, Scanning Spectroscopy, Fourier Transform Infrared Thermodynamics Water Purification / methods* |
| Chemical | |
Reg. No./Substance:
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0/Fluorides; 9012-76-4/Chitosan |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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