Effect of UVA irradiance on photocatalytic and UVA inactivation of Bacillus cereus spores.
The current study is the first to delineate the contribution of photocatalysis to inactivation of Bacillus cereus endospores on dry surfaces over a broad range (0-153W/m(2)) of UVA irradiance. Inactivation of spores at low UVA irradiance (30W/m(2)) was primarily due to photocatalysis, whereas at higher UVA irradiance inactivation was primarily due to UV alone. A linear relationship between UVA irradiance and the rate of spore inactivation was observed in the absence of photocatalyst. The rate of photocatalytic inactivation was non-linear with respect to UVA irradiance, exhibiting a maximum at 30W/m(2).
Zhao
Jue
J
Department of Environmental Engineering Sciences, University of Florida, Gainesville, FL, USA. jue.zhao@aecom.com
Krishna
Vijay
V
Hua
Bin
B
Moudgil
Brij
B
Koopman
Ben
B
D001409:Bacillus cereus / Q000166:cytology* / Q000187:drug effects / Q000502:physiology / Q000528:radiation effects*; D002384:Catalysis / Q000528:radiation effects; D005516:Food Microbiology; D008567:Membranes, Artificial; D050296:Microbial Viability / Q000187:drug effects / Q000528:radiation effects*; D055668:Photochemical Processes / Q000528:radiation effects*; D013171:Spores, Bacterial / Q000737:chemistry / Q000187:drug effects / Q000528:radiation effects; D013499:Surface Properties; D014025:Titanium / Q000494:pharmacology; D014466:Ultraviolet Rays
D008567:Membranes, Artificial; C009495:titanium dioxide; D014025:Titanium