Degradation of cyanotoxins (microcystin) in drinking water using photoelectrooxidation/Degradação de cianotoxinas (microcistinas) em água potável aplicando fotoeletrooxidação

The discharge of sewage and industrial effluents containing high concentrations of pollutants in water bodies increases eutrophication. Cyanobacteria, some of the organisms whose growth is promoted by high nutrient concentrations, are resistant and produce several types of toxins, known as cyanotoxi...

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Bibliographic Details
Published in:Brazilian journal of biology 2015-05, Vol.75 (2), p.45-45
Main Authors: Garcia, A C A, Rodrigues, M A S, Xavier, J L N, Gazulla, V, Meneguzzi, A, Bernardes, A M
Format: Article
Language:English
Subjects:
Algae
Cyanobacteria
Drinking water
Electric currents
Freshwater
Ultraviolet radiation
Water treatment
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Summary:The discharge of sewage and industrial effluents containing high concentrations of pollutants in water bodies increases eutrophication. Cyanobacteria, some of the organisms whose growth is promoted by high nutrient concentrations, are resistant and produce several types of toxins, known as cyanotoxins, highly harmful to human beings. Current water treatment systems for the public water supply are not efficient in degradation of toxins. Advanced oxidation processes (AOP) have been tested for the removal of cyanotoxins, and the results have been positive. This study examines the application of photoelectrooxidation in the degradation of cyanotoxins (microcystins). The performance of the oxidative processes involved was evaluated separately: Photocatalysis, Electrolysis and Photoelectrooxidation. Results showed that the electrical current and UV radiation were directly associated with toxin degradation. The PEO system is efficient in removing cyanotoxins, and the reduction rate reached 99%. The final concentration of toxin was less than 1 µg/L of microcystin in the treated solution.
ISSN:1519-6984
1678-4375