Show simple item record

dc.contributor.authorNicholson, B.
dc.contributor.authorShaw, G.
dc.contributor.authorMorrall, J.
dc.contributor.authorSenogles, P.
dc.contributor.authorWoods, T.
dc.contributor.authorPapageorgiou, J.
dc.contributor.authorKapralos, C.
dc.contributor.authorWickramasinghe, W.
dc.contributor.authorDavis, B.
dc.contributor.authorEaglesham, G.
dc.contributor.authorMoore, M.
dc.date.accessioned2017-05-03T11:10:36Z
dc.date.available2017-05-03T11:10:36Z
dc.date.issued2003
dc.date.modified2009-03-02T02:53:37Z
dc.identifier.issn09593330
dc.identifier.doi10.1080/09593330309385678
dc.identifier.urihttp://hdl.handle.net/10072/21532
dc.description.abstractChlorination was investigated as a treatment option for degrading and thus removing saxitoxins (paralytic shellfish poisons, PSPs) produced by cyanobacteria (blue-green algae) from water. It was found to be effective with the order of ease of degradation of the saxitoxins being GTX5 (B1) ~ dcSTX > STX > GTX3 ~ C2 > C1 > GTX2. However the effectiveness of chlorine was pH dependent. Degradation as a function of pH was not linear with the degree of degradation increasing rapidly at around pH 7.5. At pH 9 > 90% removal was possible provided a residual of 0.5 mg l-1 free chlorine was present after 30 min contact time. The more effective degradation at higher pH was unexpected as chlorine is known to be a weaker oxidant under these conditions. The more effective degradation, then, must be due to the toxins, which are ionisable molecules, being present in a form at higher pH which is more susceptible to oxidation. The feasibility of using chlorine to remove saxitoxins during water treatment will therefore depend strongly on the pH of the water being chlorinated. Degradation may be improved by pH adjustment but may not be a practical solution. Although saxitoxins were degraded in that the parent compounds were not detected by chemical analysis, there is no indication as to the nature of the degradation products. However, acute toxicity as determined by the mouse bioassay was eliminated.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoen_AU
dc.publisherSelper Ltd.
dc.publisher.placeUnited Kingdom
dc.relation.ispartofpagefrom1341
dc.relation.ispartofpageto1348
dc.relation.ispartofissue11
dc.relation.ispartofjournalEnvironmental Technology
dc.relation.ispartofvolume24
dc.subject.fieldofresearchEnvironmental Sciences
dc.subject.fieldofresearchBiological Sciences
dc.subject.fieldofresearchEngineering
dc.subject.fieldofresearchcode05
dc.subject.fieldofresearchcode06
dc.subject.fieldofresearchcode09
dc.titleChlorination for degrading saxitoxins (paralytic shellfish poisons) in water
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.date.issued2003
gro.hasfulltextNo Full Text
gro.griffith.authorShaw, Glendon R.


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

  • Journal articles
    Contains articles published by Griffith authors in scholarly journals.

Show simple item record