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SUMMARY:Treatment of surface water by O3 or O3/H2O2 AOP: Cost-benefit of m
 icropollutant elimination versus formation of oxidation products and by-pr
 oducts
DTSTART:20141125T161500
DTEND:20141125T171500
DTSTAMP:20260916T065533Z
UID:233028ff694c41262970cf2c54499cc7cabd7e52c125cde854980e42
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr Marc Bourgin\, Environmental Chemistry\, EAWAG Duebendorf\n
 Abstract:\nThe combination of O3 and H2O2 is a widely appliedAOP\, produci
 ng highly reactive •OH radicals\,to improve water quality at moderate co
 st compared to other AOPs. In the present study\, the oxidation of a broad
  range of micropollutants (pharmaceuticals\, pesticides\, X-Ray contrast m
 edia\, artificial sweeteners and industrial chemicals) by conventional ozo
 nation and the AOP O3/H2O2was investigated in two pilot-plants (convention
 al system and PRO3MIX\, 4 – 5 m3/h) treatingLake Zürich water. The foll
 owing parameters were studied: ozone dose (0.5 – 3 mg/L)\, initial bromi
 de concentration (16 – 200 µg/L)\, pH (6.5 – 8.5) and O3:H2O2 mass ra
 tio (1:0.35 – 1:3). Elimination of chemicals > 90%\, even for persistent
  compounds like sucralose\, could be achieved at optimized conditions. The
  formation of selected transformation products and their further oxidation
  was also followed up. The production of bromate\, apotentially carcinogen
 ic ozonation by-product\, could be substantially reduced by a factor ≥5 
 for optimized H2O2 doses.Short biography:\nMarc Bourgin completed his PhD 
 in 2011 at the National Polytechnic Institute of Toulouse (France) where h
 e investigated the ozonation of pesticides in water and on seeds. From 201
 1 to 2012\, he worked as a postdoc at the National Veterinary School of Na
 ntes (France) and studied the elimination of some endocrine disrupting com
 pounds during oxidative water treatment. Since March 2013\, Marc Bourgin h
 as been involved in the EU project DEMEAU as a postdoc at Eawag where he i
 s currently investigating the efficiency of ozonation processes in pilot- 
 and full-scale to remove micropollutants and mitigate the formation of tra
 nsformation products and oxidation by-products.
LOCATION:GR A3 31 http://plan.epfl.ch/?room=GR%20A3%2031
STATUS:CONFIRMED
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