Effect of chlorination on Microcystis aeruginosa cell integrity and subsequent microcystin release and degradation

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dc.contributor.authorDaly, R.
dc.contributor.authorHo, L.
dc.contributor.authorBrookes, J.
dc.date.issued2007
dc.descriptionCopyright © 2007 American Chemical Society
dc.description.abstractThe proliferation of cyanobacteria in drinking water sources is problematic for water authorities as they can interfere with water treatment processes. Studies have shown that oxidants such as chlorine can enhance the coagulation of cyanobacteria; however, chlorine can potentially lyse cyanobacterial cells, releasing toxic metabolites. Chlorine also has the potential to effectively degrade these toxins. This study evaluated the effect of chlorine on the cell integrity of toxic Microcystis aeruginosa in reservoir water using flow cytometry. In addition, the effect of chlorine on the subsequent release and degradation of microcystin toxins was systematically assessed. Cell lysis occurred at chlorine exposure values between 7 and 29 mg min/L, which is within the range of normal disinfection practices. Intracellular toxin was shown to be released from damaged cells at a rate three times faster than it was degraded by chlorine. The degradation of extracellular microcystin by chlorine was found to be dependent upon the pH, chlorine exposure, and the presence of cyanobacterial cells.
dc.description.statementofresponsibilityRobert I. Daly, Lionel Ho, and Justin D. Brookes
dc.identifier.citationEnvironmental Science and Technology, 2007; 41(12):4447-4453
dc.identifier.doi10.1021/es070318s
dc.identifier.issn0013-936X
dc.identifier.issn1520-5851
dc.identifier.orcidBrookes, J. [0000-0001-8408-9142]
dc.identifier.urihttp://hdl.handle.net/2440/43709
dc.language.isoen
dc.publisherAmer Chemical Soc
dc.source.urihttps://doi.org/10.1021/es070318s
dc.subjectCell Membrane
dc.subjectMicrocystis
dc.subjectChlorine
dc.subjectWater
dc.subjectFlow Cytometry
dc.subjectWater Microbiology
dc.subjectWater Purification
dc.subjectHydrogen-Ion Concentration
dc.subjectSouth Australia
dc.subjectMicrocystins
dc.titleEffect of chlorination on Microcystis aeruginosa cell integrity and subsequent microcystin release and degradation
dc.typeJournal article
pubs.publication-statusPublished

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