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Disinfection of urines using an electro-ozonizer
- Source :
- RUIdeRA. Repositorio Institucional de la UCLM, instname
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- In this work, the disinfection of urines polluted with Klebsiella pneumoniae (K. pneumoniae) using a commercial electro-ozonizer is described. The device consists of a membrane-electrode assembly flow cell that specially promotes the electrochemical generation of ozone. Results show that a complete disinfection is attained in less than 180 min when working at current intensities higher than 0.5 A. The higher the current intensity, the higher the disinfection rate. Furthermore, the use of an electro-ozonizer for treating diluted urines leads to higher disinfection efficiencies. Ozone and chlorine-based disinfectants (hypochlorite and chloramines) were identified as the main oxidant species involved in killing bacteria. The combined effect of all disinfectants promotes higher removal efficiencies in comparison with the single effect of ozone evaluated in a urine matrix without chlorides, being more remarkable at lower current intensities. The crystal violet assay showed that cell wall is damaged by the electrogenerated oxidants and it is more remarkable by the combined effect of ozone and chlorine disinfectants when increasing the current intensity. Finally, the degradation of total proteins and genetic material (DNA) were also monitored and related to the oxidants produced during the electrochemical process.
- Subjects :
- Chloramine
Ozone
Chromatography
biology
General Chemical Engineering
chemistry.chemical_element
Hypochlorite
Ingeniería química
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
biology.organism_classification
01 natural sciences
0104 chemical sciences
Matrix (chemical analysis)
chemistry.chemical_compound
chemistry
Electrochemistry
Chlorine
Degradation (geology)
Electrodesinfección
Crystal violet
Ozono
0210 nano-technology
Bacteria
Subjects
Details
- ISSN :
- 00134686
- Volume :
- 382
- Database :
- OpenAIRE
- Journal :
- Electrochimica Acta
- Accession number :
- edsair.doi.dedup.....4d70f514607f48505053e614c21baffc