Title of article :
Field solar E. coli inactivation in the absence and presence
of TiO2: is UV solar dose an appropriate parameter
for standardization of water solar disinfection?
Angela-Guiovana Rinco´ n، نويسنده , , Cesar Pulgarin، نويسنده ,
Issue Information :
ماهنامه با شماره پیاپی سال 2004
Evaluation of solar treatment in the absence and presence of TiO2 has been made to assess its effectiveness in reducing
bacterial load with respect to drinking water standards.
Field experiments under direct solar radiation were carried out using a compound parabolic collector (CPC) placed
at the Swiss Federal Institute of Technology (EPFL), Lausanne, Switzerland. Water contaminated with E. coli K12 was
exposed to sunlight in different seasons. The obtained results indicate that the presence of TiO2 accelerates the detrimental
action of light. Total photocatalytic disinfection was obtained in both periods of year and no bacterial recovery
was observed during 24h after stopping sunlight exposure. In the absence of TiO2, total disinfection was not always
reached; and bacterial recovery was observed, especially when inactivation was not complete. Bacterial decay was
mainly dependent on light intensity. It was also demonstrated that solar UV dose is not a pertinent parameter to standardize
solar disinfection. The influence of the following topics on solar water disinfection is also studied in this paper:
(a) UV and total solar spectra characteristics (b) volume of phototreated water (c) post-irradiation events.
2004 Elsevier Ltd. All rights reserved
Heterogeneous photocatalysis , TiO2 , Culturability , Escherichia coli , Solar disinfection
Journal title :