Open Access
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Sensors, volume 22, issue 16, pages 6049

Electroactive Biofilms of Activated Sludge Microorganisms on a Nanostructured Surface as the Basis for a Highly Sensitive Biochemical Oxygen Demand Biosensor

Kurbanalieva Saniyat 1
Kharkova Anna 1
Popova Nadezhda 3
Publication typeJournal Article
Publication date2022-08-12
Journal: Sensors
Quartile SCImago
Q1
Quartile WOS
Q2
Impact factor3.9
ISSN14243210, 14248220
PubMed ID:  36015810
Biochemistry
Analytical Chemistry
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering
Instrumentation
Abstract

The possibility of the developing a biochemical oxygen demand (BOD) biosensor based on electroactive biofilms of activated sludge grown on the surface of a graphite-paste electrode modified with carbon nanotubes was studied. A complex of microscopic methods controlled biofilm formation: optical microscopy with phase contrast, scanning electron microscopy, and laser confocal microscopy. The features of charge transfer in the obtained electroactive biofilms were studied using the methods of cyclic voltammetry and electrochemical impedance spectroscopy. The rate constant of the interaction of microorganisms with the extracellular electron carrier (0.79 ± 0.03 dm3(g s)−1) and the heterogeneous rate constant of electron transfer (0.34 ± 0.02 cm s−1) were determined using the cyclic voltammetry method. These results revealed that the modification of the carbon nanotubes’ (CNT) electrode surface makes it possible to create electroactive biofilms. An analysis of the metrological and analytical characteristics of the created biosensors showed that the lower limit of the biosensor based on an electroactive biofilm of activated sludge is 0.41 mgO2/dm3, which makes it possible to analyze almost any water sample. Analysis of 12 surface water samples showed a high correlation (R2 = 0.99) with the results of the standard method for determining biochemical oxygen demand.

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Kurbanalieva S. et al. Electroactive Biofilms of Activated Sludge Microorganisms on a Nanostructured Surface as the Basis for a Highly Sensitive Biochemical Oxygen Demand Biosensor // Sensors. 2022. Vol. 22. No. 16. p. 6049.
GOST all authors (up to 50) Copy
Kurbanalieva S., Arlyapov V. A., Kharkova A., Perchikov R., Kamanina O., Melnikov P. V., Popova N., Мачулин А. В., Tarasov S. E., Saverina E., Vereshchagin A. N., Reshetilov A. N. Electroactive Biofilms of Activated Sludge Microorganisms on a Nanostructured Surface as the Basis for a Highly Sensitive Biochemical Oxygen Demand Biosensor // Sensors. 2022. Vol. 22. No. 16. p. 6049.
RIS |
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RIS Copy
TY - JOUR
DO - 10.3390/s22166049
UR - https://doi.org/10.3390%2Fs22166049
TI - Electroactive Biofilms of Activated Sludge Microorganisms on a Nanostructured Surface as the Basis for a Highly Sensitive Biochemical Oxygen Demand Biosensor
T2 - Sensors
AU - Kurbanalieva, Saniyat
AU - Kharkova, Anna
AU - Perchikov, Roman
AU - Kamanina, Olga
AU - Saverina, Evgeniya
AU - Arlyapov, Vyacheslav A
AU - Melnikov, Pavel V
AU - Popova, Nadezhda
AU - Мачулин, А. В.
AU - Tarasov, Sergey E
AU - Vereshchagin, Anatoly N.
AU - Reshetilov, A. N.
PY - 2022
DA - 2022/08/12 00:00:00
PB - Multidisciplinary Digital Publishing Institute (MDPI)
SP - 6049
IS - 16
VL - 22
PMID - 36015810
SN - 1424-3210
SN - 1424-8220
ER -
BibTex |
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BibTex Copy
@article{2022_Kurbanalieva,
author = {Saniyat Kurbanalieva and Anna Kharkova and Roman Perchikov and Olga Kamanina and Evgeniya Saverina and Vyacheslav A Arlyapov and Pavel V Melnikov and Nadezhda Popova and А. В. Мачулин and Sergey E Tarasov and Anatoly N. Vereshchagin and A. N. Reshetilov},
title = {Electroactive Biofilms of Activated Sludge Microorganisms on a Nanostructured Surface as the Basis for a Highly Sensitive Biochemical Oxygen Demand Biosensor},
journal = {Sensors},
year = {2022},
volume = {22},
publisher = {Multidisciplinary Digital Publishing Institute (MDPI)},
month = {aug},
url = {https://doi.org/10.3390%2Fs22166049},
number = {16},
pages = {6049},
doi = {10.3390/s22166049}
}
MLA
Cite this
MLA Copy
Kurbanalieva, Saniyat, et al. “Electroactive Biofilms of Activated Sludge Microorganisms on a Nanostructured Surface as the Basis for a Highly Sensitive Biochemical Oxygen Demand Biosensor.” Sensors, vol. 22, no. 16, Aug. 2022, p. 6049. https://doi.org/10.3390%2Fs22166049.
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