Document Detail


Inactivation of Escherichia coli by sonoelectrocatalytic disinfection using TiO(2) as electrode.
MedLine Citation:
PMID:  23141189     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
This is the first study to demonstrate sonoelectrocatalytic disinfection using titanium dioxide (TiO(2)) as an anode for effective inactivation of Escherichia coli. In brief, a non-woven TiO(2) fabric used as an anode and a platinum cathode were immersed in an E. coli suspension in which a positive potential was applied to TiO(2) concomitant with ultrasound (US) irradiation. Two control experiments were performed using E. coli suspensions to exhibit the effects of the sonoelectrocatalytic disinfection. One was disinfection by applying a positive potential to a TiO(2) electrode, but without US irradiation (electrochemical disinfection). The other was disinfection without applying a potential, but with US irradiation in the presence of TiO(2) (sonocatalytic disinfection). The cell inactivation rate in sonoelectrocatalytic disinfection was synergistically much more enhanced than the combined inactivation rates in electrochemical disinfection and sonocatalytic disinfection. This synergistically enhanced inactivation rate of E. coli cells was attributable to effective reaction of the sonocatalytically generated OH radicals with E. coli cells at the surface of the TiO(2) anode, which resulted from the electroadsorption of E. coli cells toward the TiO(2) anode.
Authors:
Kazuaki Ninomiya; Masayuki Arakawa; Chiaki Ogino; Nobuaki Shimizu
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-23
Journal Detail:
Title:  Ultrasonics sonochemistry     Volume:  -     ISSN:  1873-2828     ISO Abbreviation:  Ultrason Sonochem     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-11-12     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9433356     Medline TA:  Ultrason Sonochem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 Elsevier B.V. All rights reserved.
Affiliation:
Institute of Nature and Environmental Technology, Kanazawa University, Kanazawa 920-1192, Japan.
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