Microbial electrochemistry merges microbiology, electrochemistry and electronics to provide a set of technologies for environmental engineering applications. Understanding the electronic concepts is crucial for effectively adopting these systems, but the importance of electronic circuitry is often overlooked by microbial electrochemistry researchers. This review provides the background on the electronics and electrochemical concepts involved in the study of microorganisms interacting with electricity, and their applications in microbial electrochemical technology (MET). The potentiostat circuitry is described along with its working principles. Electrochemical analyses are presented together with the rational and parameters employed to study MET devices and electroactive microorganisms. Finally, future directions are delineated towards the adoption of MET, and the related electronics, in environmental engineering applications.
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http://dx.doi.org/10.1016/j.bios.2019.111884 | DOI Listing |
J Xenobiot
December 2024
Department of Chemical Engineering, University of Pretoria, Pretoria 0028, South Africa.
The direct discharge of cationic surfactants into environmental matrices has exponentially increased due to their wide application in many products. These compounds and their degraded products disrupt microbial dynamics, hinder plant survival, and affect human health. Therefore, there is an urgent need to develop electroanalytical assessment techniques for their identification, determination, and monitoring.
View Article and Find Full Text PDFAppl Biochem Biotechnol
December 2024
School of Metallurgy, Northeastern University, Shenyang, China.
Electrochemical and shake flask tests were used to examine the corrosion characteristics of typical gangue minerals in biometallurgical systems and their impact on microbial communities. The results show that the solubility order of the three gangue minerals is feldspar, mica, and quartz in descending order. Their corrosion processes are mainly controlled by cathodic electron-donating processes.
View Article and Find Full Text PDFWater Res
December 2024
College of Water Sciences, Beijing Normal University, Beijing 100875, China; Beijing ENFI Environmental Protection Co., Ltd., Beijing, 100038, China.
The impact of nanominerals on microbial electron transfer and energy metabolism strategies during pollutant degradation remains uncertain. This study used in situ synthesized FeS nanoparticles (FeS NPs) to increase the degradation efficiency of SMX by anaerobic bacterial communities from 25.80 % to 47.
View Article and Find Full Text PDFACS Appl Mater Interfaces
December 2024
Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 02841, Republic of Korea.
A biofuel cell is an electrochemical device using exoelectrogen or biocatalysts to transfer electrons from redox reactions to the electrodes. While wild-type microbes and natural enzymes are often employed as exoelectrogen and biocatalysts, genetically engineered or modified organisms have been developed to enhance exoelectrogen activity. Here, we demonstrated a redox-enzyme integrated microbial fuel cell (REI-MFC) design based on an exoelectrogen-enhancing strategy that reinforces the electrogenic activity of MR1 by displaying an extra redox enzyme on the cell surface.
View Article and Find Full Text PDFFood Chem
December 2024
Chemistry Department, Faculty of Science, Cairo University, Giza 12613, Egypt.
Food preservatives are essential for maintaining the safety and quality of food products. Nisin and natamycin are natural food preservatives extensively used in the food industry to enhance various food products' shelf life and safety. Nisin, a polycyclic antibacterial peptide, is effective against a broad spectrum of Gram-positive bacteria, including foodborne pathogens and spoilage organisms.
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