Abstract：
:A structurally simple dielectric barrier discharge based mercury-free plasma UV-light source has been developed for efficient water disinfection. The source comprises of a dielectric barrier discharge arrangement between two co-axial quartz tubes with an optimized gas gap. The outer electrode is an aluminium baked foil tape arranged in a helical form with optimized pitch, while the inner electrode is a hollow aluminium metallic rod, hermetically sealed. Strong bands peaking at wavelengths 172 nm and 253 nm, along with a weak band peaking at wavelength 265 nm have been simultaneously observed due to plasma radiation from the admixture of xenon and iodine gases. The developed UV source has been used for bacterial deactivation studies using an experimental setup that is an equivalent of the conventional house-hold water purifier system. Deactivation studies for five types of bacteria, i.e., E. coli, Shigella boydii, Vibrio, Coliforms and Fecal coliform have been demonstrated with 4 log reductions in less than ten seconds.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Prakash R,Hossain AM,Pal UN,Kumar N,Khairnar K,Mohan MKdoi
10.1038/s41598-017-17455-2subject
Has Abstractpub_date
2017-12-12 00:00:00pages
17426issue
1issn
2045-2322pii
10.1038/s41598-017-17455-2journal_volume
7pub_type
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