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State of the art on cyanotoxins in water and their behaviour towards chlorine.

Abstract : The occurrence of cyanobacterial blooms is drastically increasing in temperate countries and drinking water resources are threatened. As a result, cyanotoxins should be considered in water treatment to protect human health. This study presents a state of the art on cyanotoxins in water and their behaviour towards chlorination, a common drinking water disinfection process. Chlorination efficiency on cyanotoxins alteration depends on pH, chlorine dose and oxidant nature. Microcystins and cylindrospermopsin are efficiently transformed by chlorine, with respectively 6 and 2 by-products identified. In addition, chlorination of microcystins and cylindrospermopsin is associated with a loss of acute toxicity. Even though they have been less investigated, saxitoxins and nodularins are also altered by chlorine. For these toxins, no by-products have been identified, but the chlorinated mixture does not show acute toxicity. On the contrary, the fact that anatoxin-a has a very slow reaction kinetics suggests that this toxin resists chlorination.
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https://hal-univ-rennes1.archives-ouvertes.fr/hal-01122372
Contributor : Laurent Jonchère <>
Submitted on : Tuesday, March 3, 2015 - 4:57:46 PM
Last modification on : Wednesday, September 16, 2020 - 7:28:03 PM

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Sylvain Merel, Michel Clément, Olivier Thomas. State of the art on cyanotoxins in water and their behaviour towards chlorine.. Toxicon, Elsevier, 2010, 55 (4), pp.677-91. ⟨10.1016/j.toxicon.2009.10.028⟩. ⟨hal-01122372⟩

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