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Open AccessArticle

Evaluation of the Ecological Potential of Microorganisms for Purifying Water with High Iron Content

1
Department of Biochemistry and Biophysics, Saratov State University, 410012 Saratov, Russia
2
LUKOIL-Engineering LLC, Kogalymnipineft Branch in Tyumen, Center for the Study of Core and Reservoir Fluids, 628486 Kogalym, Russia
3
Federal State Budgetary Educational Institution of Higher Education, Russian Timiryazev State Agrarian University, 127550 Moscow, Russia
*
Authors to whom correspondence should be addressed.
Academic Editor: Mikael Motelica-Heino
Water 2021, 13(7), 901; https://doi.org/10.3390/w13070901
Received: 25 February 2021 / Revised: 20 March 2021 / Accepted: 22 March 2021 / Published: 26 March 2021
The ability of a number of microorganisms isolated from highly magnetic soil of the city Mednogorsk to oxidize Fe (II) under conditions of periodic cultivation in a liquid medium was studied. Among the studied microorganisms, two microbial isolates with maximum growth characteristics and iron-oxidizing activity were selected and identified: Bacillus megaterium 69.3 and B. megaterium 69.5. Individual levels of metal resistance of the isolates were determined: maximum tolerated concentration (MTC) for Fe (II) of the isolates B. megaterium 69.3 and B. megaterium 69.5 was 1200 mg L−1, minimum inhibitory concentration (MIC) was 1800 mg L−1. Both microbial isolates actively oxidized Fe (II) by reducing its high concentration in the medium (1.19 g L−1) by 33 and 39% during 14 days of culturing. Total increase in the biomass of B. megaterium 69.3 and B. megaterium 69.5 after 14 days of culturing was 15.3 and 14.7 g L−1; the active parts of the biomass increased 8.7- and 6.9-fold compared to the inoculum dose, respectively. These microbial isolates could be used in future in the biotechnological process of water purification with increased/high levels of Fe (II). View Full-Text
Keywords: iron; iron-oxidizing microorganisms; cultivation; biomass growth; water purification iron; iron-oxidizing microorganisms; cultivation; biomass growth; water purification
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MDPI and ACS Style

Pleshakova, E.; Ngun, C.; Reshetnikov, M.; Larionov, M.V. Evaluation of the Ecological Potential of Microorganisms for Purifying Water with High Iron Content. Water 2021, 13, 901. https://doi.org/10.3390/w13070901

AMA Style

Pleshakova E, Ngun C, Reshetnikov M, Larionov MV. Evaluation of the Ecological Potential of Microorganisms for Purifying Water with High Iron Content. Water. 2021; 13(7):901. https://doi.org/10.3390/w13070901

Chicago/Turabian Style

Pleshakova, Ekaterina; Ngun, Clement; Reshetnikov, Mikhail; Larionov, Maxim V. 2021. "Evaluation of the Ecological Potential of Microorganisms for Purifying Water with High Iron Content" Water 13, no. 7: 901. https://doi.org/10.3390/w13070901

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