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|Title:||Novel chitosan-cellulose hydrogel adsorbents for lead adsorption|
|Authors:||Li, N. |
|Source:||Li, N.,Bai, R. (2004). Novel chitosan-cellulose hydrogel adsorbents for lead adsorption. AIChE Annual Meeting, Conference Proceedings : 5295-5309. ScholarBank@NUS Repository.|
|Abstract:||In this study, we examined the properties of chitosan-cellulose hydrogel beads as an adsorbent and its application for lead ion adsorption. Chitosan was blended with cellulose to improve the mechanical strength of chitosan hydrogel beads and the chitosan-cellulose hydrogel beads were cross-linked with ethylene glycol diglycidyl ether (EGDE) to enhance their acid-resistant ability. Scanning electron microscopic (SEM) observation also showed that the crosslinking reaction resulted in the chitosan-cellulose hydrogel beads having porous surface structure. Batch adsorption experiments indicated that both the chitosan-cellulose and the crosslinked chitosan-cellulose hydrogel beads had high adsorption capacities for lead ion removal although the adsorption performances were pH-dependent. The adsorption isotherm of chitosan-cellulose beads and crosslinked chitosan-cellulose beads can be well fitted to the Freundlich model. The kinetic adsorption data obeyed the Fickan's law and suggested an intraparticle-diffusion-controlled adsorption process. X-ray photoelectron spectroscopy (XPS) revealed that the amine groups on chitosan were involved in the surface complexation for lead ion adsorption.|
|Source Title:||AIChE Annual Meeting, Conference Proceedings|
|Appears in Collections:||Staff Publications|
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