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

    Author(s)
    Senogles, P
    Shaw, G
    Smith, M
    Norris, R
    Chiswell, R
    Mueller, J
    Sadler, R
    Eaglesham, G
    Griffith University Author(s)
    Shaw, Glendon R.
    Sadler, Ross F.
    Year published
    2000
    Metadata
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    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 effectiveness of chlorination as a water treatment procedure for cylindrospermopsin degradation. The results demonstrate that relatively low chlorine doses (<1 mg l−1) are sufficient 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 effectiveness of chlorine for cylindrospermopsin degradation ...
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    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 effectiveness of chlorination as a water treatment procedure for cylindrospermopsin degradation. The results demonstrate that relatively low chlorine doses (<1 mg l−1) are sufficient 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 effectiveness 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 l−1 was sufficient to degrade >99% of cylindrospermopsin. Toxin degradation via chlorination occurs within the first minute and no difference 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 efficiency 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.
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    Journal Title
    Toxicon
    Volume
    38
    DOI
    https://doi.org/10.1016/S0041-0101(99)00210-X
    Subject
    Pharmacology and Pharmaceutical Sciences
    Publication URI
    http://hdl.handle.net/10072/58343
    Collection
    • Journal articles

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