| Study of the mechanisms of Cu2+ biosorption by ethanol/caustic-pretreated baker's yeast biomass. | |
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MedLine Citation:
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PMID: 20226588 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Baker's yeast biomass was pretreated by ethanol and caustic soda, and then the pristine baker's yeast, ethanol pretreated baker's yeast (ethanol-baker's yeast) and caustic soda pretreated baker's yeast (caustic-baker's yeast) were utilized as biosorbents to adsorb Cu(2+) in aqueous solution. The influence of different parameters on Cu(2+) uptake by the three biomasses, such as initial Cu(2+) concentration, initial pH of solution, contact time and temperature, was studied. The mechanism of Cu(2+) binding by biomass was investigated by a number of techniques. Evidence from potentiometric titration revealed that the concentration of carboxyl and amino groups is higher on the caustic and ethanol-baker's yeast compared to the pristine baker's yeast and FTIR spectra confirmed carboxyl, and amino groups on the surface of baker's yeast could be available for characteristic coordination bonding with Cu(2+). In addition, SEM and Zeta potential of the three samples show that caustic and ethanol-pretreatment resulted in the change of baker's yeast surface structure and charge which is relative to adsorption. These results demonstrate that the increase of biosorption capacity for Cu(2+) by ethanol and caustic-baker's yeast was attributed to the increase and exposure of carboxyl and amino groups on the surface of biomass sample. |
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Authors:
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Yunsong Zhang; Weiguo Liu; Meng Xu; Fei Zheng; Maojun Zhao |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-02-20 |
Journal Detail:
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Title: Journal of hazardous materials Volume: 178 ISSN: 1873-3336 ISO Abbreviation: J. Hazard. Mater. Publication Date: 2010 Jun |
Date Detail:
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Created Date: 2010-04-13 Completed Date: 2010-07-13 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9422688 Medline TA: J Hazard Mater Country: Netherlands |
Other Details:
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Languages: eng Pagination: 1085-93 Citation Subset: IM |
Copyright Information:
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Copyright 2010 Elsevier B.V. All rights reserved. |
Affiliation:
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College of Life and Science, Sichuan Agricultural University, Yaan 625014, PR China. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adsorption Alkalies / chemistry Biomass* Copper / chemistry* Copper Sulfate / chemistry Electrochemistry Ethanol / chemistry* Hydrogen-Ion Concentration Kinetics Microscopy, Electron, Scanning Models, Statistical Particle Size Potentiometry Saccharomyces cerevisiae / chemistry* Solutions Spectroscopy, Fourier Transform Infrared Surface Properties Temperature Water |
| Chemical | |
Reg. No./Substance:
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0/Alkalies; 0/Solutions; 64-17-5/Ethanol; 7440-50-8/Copper; 7732-18-5/Water; 7758-98-7/Copper Sulfate |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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