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Abstract
The influence of Gezagard herbicide (active ingredient – promethrin, 500 g/l) and fungicide Kolosal (active principle – tebuconazole 250 g/l) on the dynamics of electrical indicators of microbial fuel cells (MFC) with activated sludge treatment plants as a bioagent was studied. It was shown that the tested pollutants reduced the electrogenic activity of sludge in MFC when the content in wastewater was from 0.1 g/l. The studied toxicants in the indicated concentrations significantly inhibited the dehydrogenase activity of the sludge microorganisms and the total microbial number. At the same time, the Kolosal fungicide had a more pronounced negative effect on all the studied parameters than the Gezagard herbicide. There is a positive relationship between the results of evaluating the electrogenic activity of sludge and such classical methods of its analysis as dehydrogenase activity and the total microbial number. This suggests that the ability of the sludge to generate an electric current in MFC can be used as one of the parameters for assessing its physiological state. In addition, in the case of a mono-composition of pollutants, MFC with activated sludge can be used as a tool for the initial non-specific assessment of wastewater pollution by pesticides.
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Details
1 Irkutsk State University, Irkutsk, Lenin Street, 3, Russia
2 Irkutsk National Research Technical University, Irkutsk, Lermontov Street 83, Russia
3 Baikal Museum of the ISC, Listvyanka, Akademicheskaya Street, 1A, Russia
4 Irkutsk State University, Irkutsk, Lenin Street, 3, Russia; Irkutsk National Research Technical University, Irkutsk, Lermontov Street 83, Russia; Baikal Museum of the ISC, Listvyanka, Akademicheskaya Street, 1A, Russia