Document Detail


Sorption of chromium(VI) using modified forms of chitosan beads.
MedLine Citation:
PMID:  20361994     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Modified forms of chitosan beads were prepared and used for chromium removal from the aqueous solution. The prepared chitosan beads viz., protonated chitosan beads (PCB), carboxylated chitosan beads (CCB) and grafted chitosan beads (GCB) possess enhanced chromium sorption capacities (SCs) of 3239, 3647 and 4057 mg/kg respectively than the raw chitosan beads (CB) which possess the SC of 1298 mg/kg with a minimum contact time of 10min. The sorption experiments were carried out in batch mode to optimize various influencing parameters viz., contact time, pH, common ions and temperature. The sorbents were characterized by FTIR and SEM with EDAX analysis. The modified chitosan beads remove chromium by means of electrostatic adsorption coupled reduction and complexation. The adsorption data was fitted with Freundlich and Langmuir isotherms. The calculated values of thermodynamic parameters indicate the nature of chromium sorption. A field trial was carried out with water collected from a nearby industrial area.
Authors:
G N Kousalya; Muniyappan Rajiv Gandhi; S Meenakshi
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-03-31
Journal Detail:
Title:  International journal of biological macromolecules     Volume:  47     ISSN:  1879-0003     ISO Abbreviation:  Int. J. Biol. Macromol.     Publication Date:  2010 Aug 
Date Detail:
Created Date:  2010-07-08     Completed Date:  2010-10-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7909578     Medline TA:  Int J Biol Macromol     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  308-15     Citation Subset:  IM    
Copyright Information:
Copyright 2010 Elsevier B.V. All rights reserved.
Affiliation:
Department of Chemistry, GTN Arts College, Dindigul 624 003, Tamilnadu, India. kousalyarajaram@yahoo.co.in
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MeSH Terms
Descriptor/Qualifier:
Adsorption
Chitosan / chemistry*
Chromium / chemistry*,  isolation & purification*
Hydrogen-Ion Concentration
Microspheres*
Temperature
Thermodynamics
Time Factors
Water Pollutants, Chemical / chemistry*,  isolation & purification*
Chemical
Reg. No./Substance:
0/Water Pollutants, Chemical; 7440-47-3/Chromium; 9012-76-4/Chitosan

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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