Document Detail

Novel magnetic chitosan/poly(vinyl alcohol) hydrogel beads: Preparation, characterization and application for adsorption of dye from aqueous solution.
MedLine Citation:
PMID:  22189074     Owner:  NLM     Status:  Publisher    
Novel magnetic chitosan/poly(vinyl alcohol) hydrogel beads (m-CS/PVA HBs) were prepared by an instantaneous gelation method and characterized by X-ray diffraction (XRD), vibrating sample magnetometry (VSM) and thermogravimetric analysis (TGA). Results of characterization indicated that m-CS/PVA HBs have been prepared successfully without damaging the crystal structure of Fe(3)O(4) and their saturation magnetization were about 21.96emug(-1). The adsorption capacity of Congo Red on the m-CS/PVA HBs was 470.1mgg(-1). The adsorption was well described by pseudo-second-order kinetics and Langmuir equation. Positive value of enthalpy change (ΔH(∘)) (13.32kJmol(-1)) showed that the adsorption was endothermic and physical in nature. The values of Gibbs free energy change (ΔG(∘)) were found to be -3.321kJmol(-1) at 298K for m-CS/PVA HBs, indicating the spontaneity of Congo Red adsorption. Therefore, the m-CS/PVA HBs could be employed as a low-cost alternative to other adsorbents in the removal of dyes from aqueous solution.
H-Y Zhu; Y-Q Fu; R Jiang; J Yao; L Xiao; G-M Zeng
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-11-25
Journal Detail:
Title:  Bioresource technology     Volume:  -     ISSN:  1873-2976     ISO Abbreviation:  -     Publication Date:  2011 Nov 
Date Detail:
Created Date:  2011-12-22     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9889523     Medline TA:  Bioresour Technol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 Elsevier Ltd. All rights reserved.
College of Life Science, Taizhou University, Linhai 317000, Zhejiang, PR China; Key Laboratory for Biomass-Resource Chemistry and Environmental Biotechnology of Hubei Province, Wuhan University, Wuhan 430072, Hubei, PR China.
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