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Chlorination of Microcystis aeruginosa suspension: Cell lysis, toxin release and degradation.
MedLine Citation:
PMID:  22483441     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Although the release of intracellular toxins after chlorination has been reported, the relation between cell lysis and the release and degradation of toxins during chlorination has not been well illustrated. This study used Microcystis aeruginosa to investigate the release and degradation behaviors of toxins after its exposure to chlorine at different doses for prolonged contact time. Scanning electron microscopy (SEM) analysis indicates no considerable change in the morphology for most algae cells. However, the release of intracellular K(+) and intracellular organic matter (IOM) did occur, and the significant K(+) release of 63% was observed even at chlorine exposure as low as 0.8mg/Lmin. The damage of cell membrane was faster than the release of intracellular MCLR at all chlorine doses. Extracellular MCLR accumulated as a result of the fact that intracellular MCLR released from damaged cells faster than it was degraded by chlorine, especially at low dose of chlorine (0.8mg/L). A maximum level of extracellular toxin at a contact time of 60, 30 and 1min was observed at chlorine doses of 1.2, 1.6 and 2.0mg/L, respectively. In addition, Cl(2) consumption (%), toxin release and degradation (%), and cells lysis (%) were well related.
Authors:
Min Ma; Ruiping Liu; Huijuan Liu; Jiuhui Qu
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-3-20
Journal Detail:
Title:  Journal of hazardous materials     Volume:  -     ISSN:  1873-3336     ISO Abbreviation:  -     Publication Date:  2012 Mar 
Date Detail:
Created Date:  2012-4-9     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9422688     Medline TA:  J Hazard Mater     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 Elsevier B.V. All rights reserved.
Affiliation:
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Graduate School of Chinese Academy of Sciences, Beijing 100039, China.
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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