The influence of the degree of cross-linking on the adsorption properties of chitosan beads
作者： Peter O. Osifo , Athena Webster , Hein van der Merwe , Hein W.J.P. Neomagus , Marius A. van der Gun
DOI: 10.1016/J.BIORTECH.2008.01.053
关键词:
摘要: Abstract The influence of the degree cross-linking (DCL) on chitosan beads was studied. Chitosan prepared from exoskeleton Cape rock-lobsters, collected surroundings Town, South Africa. were characterized; water contents and p K a varied in range 90–96% 4.3–6.0, respectively, found to decrease with increasing DCL (0.0–34.0%). A pH-model, which described reversibility metal adsorbed onto beads, used predict equilibrium properties copper adsorption cross-linked beads. model accounts for effect pH important parameters, constant ( ads ) lesser extent adsorbent capacity q max showed DCL. determined as 3.8–5.0 mmol/g (9–90) × 10 −4 , respectively. kinetics could be using shrinking core effective diffusion coefficient D eff (8.0–25.8) × 10 −11 m 2 /s. It that decreases mainly due decreased content at high
nwu.ac.za
elsevier.com
sci-hub.se 参考文章(14)
Riccardo A. A. Muzzarelli, Natural chelating polymers : alginic acid, chitin, and chitosan Pergamon Press. ,(1973)
Ruey-Shin Juang, Huey-Jen Shao, A simplified equilibrium model for sorption of heavy metal ions from aqueous solutions on chitosan. Water Research. ,vol. 36, pp. 2999- 3008 ,(2002) , 10.1016/S0043-1354(01)00537-1
Gregory L. Rorrer, Tzu Yang Hsien, J. Douglas Way, Synthesis of porous-magnetic chitosan beads for removal of cadmium ions from wastewater Industrial & Engineering Chemistry Research. ,vol. 32, pp. 2170- 2178 ,(1993) , 10.1021/IE00021A042
M Rhazi, J Desbrières, A Tolaimate, M Rinaudo, P Vottero, A Alagui, Contribution to the study of the complexation of copper by chitosan and oligomers Polymer. ,vol. 43, pp. 1267- 1276 ,(2002) , 10.1016/S0032-3861(01)00685-1
D Snyman, J.H Hamman, J.S Kotze, J.E Rollings, A.F Kotzé, The relationship between the absolute molecular weight and the degree of quaternisation of N-trimethyl chitosan chloride Carbohydrate Polymers. ,vol. 50, pp. 145- 150 ,(2002) , 10.1016/S0144-8617(02)00008-5
Sandhya Babel, Tonni Agustiono Kurniawan, Low-cost adsorbents for heavy metals uptake from contaminated water: a review. Journal of Hazardous Materials. ,vol. 97, pp. 219- 243 ,(2003) , 10.1016/S0304-3894(02)00263-7
Leticia Martinez, Florence Agnely, Bernard Leclerc, Juergen Siepmann, Marine Cotte, Sandrine Geiger, Guy Couarraze, Cross-linking of chitosan and chitosan/poly(ethylene oxide) beads: a theoretical treatment. European Journal of Pharmaceutics and Biopharmaceutics. ,vol. 67, pp. 339- 348 ,(2007) , 10.1016/J.EJPB.2007.02.012
W.S. Wan Ngah, S. Fatinathan, Chitosan flakes and chitosan–GLA beads for adsorption of p-nitrophenol in aqueous solution Colloids and Surfaces A: Physicochemical and Engineering Aspects. ,vol. 277, pp. 214- 222 ,(2006) , 10.1016/J.COLSURFA.2005.11.093
W.S Wan Ngah, C.S Endud, R Mayanar, Removal of copper(II) ions from aqueous solution onto chitosan and cross-linked chitosan beads Reactive and Functional Polymers. ,vol. 50, pp. 181- 190 ,(2002) , 10.1016/S1381-5148(01)00113-4
Eric Guibal, Interactions of metal ions with chitosan-based sorbents: a review Separation and Purification Technology. ,vol. 38, pp. 43- 74 ,(2004) , 10.1016/J.SEPPUR.2003.10.004