Document Detail


Characteristics of Zn2+ biosorption by Saccharomyces cerevisiae.
MedLine Citation:
PMID:  18348406     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
OBJECTIVE: To investigate the characteristics of Zn2+ biosorption and the release of cations during the process of Zn2+ biosorption by intact cells of Saccharomyces cerevisiae. METHODS: The batch adsorption test was used to study the biosorption equilibrium and isotherm. Zn2+ concentration was measured with atomic adsorption spectrophotometer (AAS) AAS 6 Vario. RESULTS: When the initial concentration of Zn2+ ranged between 0.08 and 0.8 mmol/L, the initial pH was natural (about 5.65), the sorbent concentration was about 1 g/L and the capacity of Zn2+ biosorption was from 74.8 to 654.8 micromol/g. The pH value increased by 0.55-1.28 and the intracellular cations (K+, Mg2+, Na+, Ca2+) of the cells were released during the process of Zn2+ biosorption. CONCLUSION: Ion exchange was one of the mechanisms for Zn2+ biosorption. The biomass of Saccharomyces cerevisiae is a potential biosorbent for the removal of Zn2+ from aqueous solution. More work needs to be done before putting it into practical application.
Authors:
Can Chen; Jian-Long Wang
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Biomedical and environmental sciences : BES     Volume:  20     ISSN:  0895-3988     ISO Abbreviation:  Biomed. Environ. Sci.     Publication Date:  2007 Dec 
Date Detail:
Created Date:  2008-03-19     Completed Date:  2008-06-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8909524     Medline TA:  Biomed Environ Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  478-82     Citation Subset:  IM    
Affiliation:
Laboratory of Environmental Technology, INET, Tsinghua University, Beijing 100084, China.
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MeSH Terms
Descriptor/Qualifier:
Hydrogen-Ion Concentration
Saccharomyces cerevisiae / metabolism*
Spectrophotometry, Atomic
Zinc / metabolism*
Chemical
Reg. No./Substance:
7440-66-6/Zinc

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


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