Degradation of the cyanobacterial toxin cylindrospermopsin from Cylindrospermopsis raciborskii, by chlorination

Senogles, P. J., Shaw, G. R., Smith, M., Norris, R. L., Chiswell, R. K., Mueller, J., Sadler, R. and Eaglesham, G. (2000) Degradation of the cyanobacterial toxin cylindrospermopsin from Cylindrospermopsis raciborskii, by chlorination. Toxicon, 38 9: 1203-1213.


Author Senogles, P. J.
Shaw, G. R.
Smith, M.
Norris, R. L.
Chiswell, R. K.
Mueller, J.
Sadler, R.
Eaglesham, G.
Title Degradation of the cyanobacterial toxin cylindrospermopsin from Cylindrospermopsis raciborskii, by chlorination
Journal name Toxicon   Check publisher's open access policy
Publication date 2000-09
Sub-type Article
DOI 10.1016/S0041-0101(99)00210-X
Volume number 38
Issue number 9
ISSN 0041-0101
Start page 1203
End page 1213
Total pages 11
Place of publication UK
Publisher Pergamon-Elsevier Science
Collection year 2000
Language eng
Subject C1
321299 Public Health and Health Services not elsewhere classified
730210 Environmental health
Abstract Cylindrospermopsin, a potent cyanobacterial toxin produced by Cylindrospermopsis raciborskii and other cyanobacteria, is regularly found in water supplies of Queensland, Australia. This study focussed on the e€ectiveness of chlorination as a water treatment procedure for cylindrospermopsin degradation. The results demonstrate that relatively low chlorine doses (<1 mg lÿ1) are sucient for degradation of cylindrospermopsin, when the dissolved organic carbon content is low. However, if organic matter other than cylindrospermopsin is present in the solution, the e€ectiveness of chlorine for cylindrospermopsin degradation is reduced as other organic matter present consumes chlorine. Under the experimental conditions using samples with a solution pH of 6±9, a residual chlorine concentration of 0.5 mg lÿ1 was sucient to degrade >99% of cylindrospermopsin. Toxin degradation via chlorination occurs within the ®rst minute and no di€erence was observable between degradation in an open system and in a closed system. With a decrease of the pH from 6 to 4 a reduction in the eciency of chlorine for degradation of cylindrospermopsin was observable, a possible indication that cylindrospermopsin is more stable to chlorine degradation at lower pH. However, in normal water treatment this is not relevant since the pH is consistently higher than 6.
Q-Index Code C1

Document type: Journal Article
Sub-type: Article
Collection: National Research Centre for Environmental Toxicology Publications
 
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Created: Tue, 10 Jun 2008, 11:48:56 EST