Nitrate removal from aqueous solutions by cross-linked chitosan beads conditioned with sodium bisulfate
- Title
- Nitrate removal from aqueous solutions by cross-linked chitosan beads conditioned with sodium bisulfate
- Authors
- CHATTERJEE, S; LEE, DS; LEE, MW; WOO, SH; null
- Date Issued
- 2009-07
- Publisher
- ELSEVIER SCIENCE BV
- Abstract
- The investigation of adsorption of nitrate onto chitosan beads modified by cross-linking with epichlorohydrin (ECH) and surface conditioning with sodium bisulfate was performed. The results indicated that both cross-linking and conditioning increased adsorption capacity compared to normal chitosan beads. The maximum adsorption capacity was found at a cross-linking ratio of 0.4 and conditioning concentration of 0.1 mM NaHSO(4). The maximum adsorption capacity was 104.0 mg g(-1) for the conditioned cross-linked chitosan beads at pH 5, while it was 90.7 mg g(-1) for normal chitosan beads. The Langmuir isotherm model fit the equilibrium data better than the Freundlich model. The mean adsorption energies obtained from the Dubinin-Radushkevich isotherm model for all adsorption systems were in the range of 9.55-9.71 kJ mol(-1), indicating that physical electrostatic force was potentially involved in the adsorption process. (C) 2008 Elsevier B.V. All rights reserved.
- Keywords
- Adsorption; Beads; Chitosan; Cross-linking; Nitrate; REACTIVE DYE; ADSORPTION; IONS; KINETICS; EQUILIBRIUM; WATER; HYDROBEADS; RED
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/28333
- DOI
- 10.1016/J.JHAZMAT.20
- ISSN
- 0304-3894
- Article Type
- Article
- Files in This Item:
- There are no files associated with this item.
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