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  4. Effect of μM Fe addition, mild heat and solar UV on sulfate radical-mediated inactivation of bacteria, viruses, and micropollutant degradation in water
 
research article

Effect of μM Fe addition, mild heat and solar UV on sulfate radical-mediated inactivation of bacteria, viruses, and micropollutant degradation in water

Marjanovic, Miloch
•
Giannakis, Stefanos
•
Grandjean, Dominique
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2018
Water Research

In this work, solar disinfection (SODIS) was enhanced by moderate addition of Fe and sodium perox- ydisulfate (PDS), under solar light. A systematic assessment of the activating factors was performed, firstly isolated, then in pairs and concluded in the combined Fe/heat/solar UV-PDS activation process. Solar light was the most effective (single) activator, and its combination with Fe and heat (double activation) yielded high level of synergies (up to S 1⁄4 2.13). The triple activation was able to reduce the bacterial load up to 6-log in less than 1 h, similarly to the photo-Fenton process done in comparison (SODIS alone: >5 h). Fe-oxides were suitable activators of PDS under the same conditions while the presence of organic matter enhanced bacterial inactivation by the triple activated PDS process. The degradation of a (selected) mixture of micropollutants (i.e. drugs, pesticides) was also achieved in similar order of magnitude, and faster than the photo-Fenton process. Finally, the removal of a viral pathogen indicator (MS2 bacteriophage) was attained at minute-range residence times. The aforementioned facts indicate the suitability of the mild, combined process, as a potential SODIS enhancement, producing safe drinking water for sunny and especially for developing countries.

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Type
research article
DOI
10.1016/j.watres.2018.04.054
Author(s)
Marjanovic, Miloch
•
Giannakis, Stefanos
•
Grandjean, Dominique
•
de Alencastro, Luiz Felippe  
•
Pulgarin, Cesar
Date Issued

2018

Published in
Water Research
Volume

140

Start page

220

End page

231

Subjects

Advanced oxidation process (AOPs)

•

Sulfate radicals

•

Photo-fenton

•

E. coli

•

MS2 bacteriophage

•

Emerging contaminants

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
GR-CEL  
GPAO  
Available on Infoscience
May 18, 2018
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/146476
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