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Survival of the Toxic Cyanobacterium Microcystis panniformis Komárek et al. Following Treatments with Gamma Radiation and Heating

Author(s): Talita C. Hereman | Joao D.T. Arruda-Neto | Erika Cavalcante-Silva | Tulio E. Rodrigues | Bruna Buch | Valter Arthur | Maria C. Bittencourt-Oliveira

Journal: Biotechnology
ISSN 1682-296X

Volume: 6;
Issue: 4;
Start page: 604;
Date: 2007;
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Keywords: Aquatic environment | cyanobacteria | Microcystis | toxin | water treatment

It is proposed an original procedure for the population control of toxic cyanobacteria by associating gamma radiation with heating. Microcystis panniformis Komárek et al. was irradiated with 5 KGy of gamma radiation, immediately followed by a heating treatment at 40°C during 90 min. The results revealed that the combination of irradiation with the heating treatment increased the number of deaths relatively to irradiation alone. Actually, after 48 h from the beginning of the experiment the death percentages relatively to the control, in samples irradiated/heated and only irradiated, were 98 and 72%, respectively. It is our understanding that the use of gamma radiation associated with heating is a new technology, which could be adapted for large scale control of toxic cyanobacteria present in water supply reservoirs.
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