Comparison of ultraviolet light-emitting diodes and low-pressure mercury-arc lamps for disinfection of water.
Environ Technol
; 37(17): 2183-8, 2016 Sep.
Article
de En
| MEDLINE
| ID: mdl-26888599
ABSTRACT
Ultraviolet (UV) light-emitting diodes (LEDs) emitting at 260â
nm were evaluated to determine the inactivation kinetics of bacteria, viruses, and spores compared to low-pressure (LP) UV irradiation. Test microbes were Escherichia coli B, a non-enveloped virus (MS-2), and a bacterial spore (Bacillus atrophaeus). For LP UV, 4-log10 reduction doses were E. coli B, 6.5â
mJ/cm(2); MS-2, 59.3â
mJ/cm(2); and B. atrophaeus, 30.0â
mJ/cm(2). For UV LEDs, the 4-log10 reduction doses were E. coli B, 6.2â
mJ/cm(2); MS-2, 58â
mJ/cm(2); and B. atrophaeus, 18.7â
mJ/cm(2). Microbial inactivation kinetics of the two UV technologies were not significantly different for E. coli B and MS-2, but were different for B. atrophaeus spores. UV LEDs at 260â
nm are at least as effective for inactivating microbes in water as conventional LP UV sources and should undergo further development in treatment systems to disinfect drinking water.
Mots clés
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Eau de boisson
/
Purification de l'eau
Langue:
En
Journal:
Environ Technol
Sujet du journal:
SAUDE AMBIENTAL
/
TOXICOLOGIA
Année:
2016
Type de document:
Article
Pays d'affiliation:
États-Unis d'Amérique