Degradation of the cyanobacterial toxin cylindrospermopsin, from Cylindrospermopsis raciborskii, by chlorination
| Autor: | Glendon Reginald Shaw, Ross Norris, M. J. Smith, P. Senogles, Ross Sadler, Jochen F. Mueller, Robyn K. Chiswell, Geoff Eaglesham |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Cyanobacteria
Sodium Hypochlorite Bacterial Toxins chemistry.chemical_element Toxicology medicine.disease_cause Cylindrospermopsis raciborskii chemistry.chemical_compound Alkaloids Water Supply polycyclic compounds Chlorine medicine Uracil Cyanobacteria Toxins biology Toxin Cyanobacterial toxin Hydrogen-Ion Concentration biology.organism_classification Carbon chemistry Environmental chemistry Water treatment Cylindrospermopsin Oxidation-Reduction Bacteria |
| Zdroj: | Toxicon. 38:1203-1213 |
| ISSN: | 0041-0101 |
| DOI: | 10.1016/s0041-0101(99)00210-x |
| Popis: | 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)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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect