Abstract
Several non-thermal plasma-based systems have been explored for the treatment of water. In this study, the performance of an atmospheric pressure gas-liquid phase air non-thermal plasma (NTP) reactor to inactivate both gram-positive (Enterococcus faecalis (E. faecalis)) and gram-negative (Escherichia coli (E. coli)) bacterial species was studied. The time-dependent effects of different applied voltages (2 kV, 4 kV, and 6 kV) on microbial decontamination were investigated in addition to changes in solution pH, conductivity and electrode temperature. Moreover, reactive oxygen species (ROS), hydroxyl radical (OH) and ozone formed during NTP treatment were quantified. Scanning Electron Microscopy (SEM) analysis revealed alterations in the morphological structure of bacteria with NTP treatment. As compared with gram-negative bacteria, gram-positive bacteria was found to be more susceptible to NTP disinfection effects. Inactivation kinetics of E. faecalis and E. coli was studied in detail and complete inactivation of E. faecalis and E. coli was observed in 10 min (4 kV) and 15 min (6 kV), respectively. Results confirm that NTP treatment of water is a promising approach for the decontamination of pathogenic bacterial species.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
