Journal
WATER RESEARCH
Volume 43, Issue 18, Pages 4718-4728Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2009.07.032
Keywords
Photodegradation; Photochemistry; Pollutant fate; Peroxynitrite; Inorganic carbon
Funding
- PNRA - Progetto Antartide
- INCA InterUniversity Consortium
- Universit di Torino - Ricerca Locale
- Scientific and Technological Cooperation Agreement
- Marie Curie International Incoming Fellowship (IIF) [PIIF-GA-2008-219350]
- NATO [CLG 982287]
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Contrary to common expectations, the hydroxyl scavengers, carbonate and bicarbonate, are able to enhance the phototransformation by nitrate of a number of substituted phenols. Carbonate and bicarbonate, in addition to modifying the solution pH, are also able to induce a considerable formation of the carbonate radicals upon nitrate photolysis. The higher availability of less-reactive species than the hydroxyl radical would contribute to substantially enhance the photodegradation of the phenols/phenolates that are sufficiently reactive toward the carbonate radical. This phenomenon has a potentially important impact on the fate of the relevant compounds in surface waters. In contrast, the degradation of compounds that are not sufficiently reactive toward CO3-center dot is inhibited by carbonate and bicarbonate because of the scavenging of (OH)-O-center dot. (C) 2009 Elsevier Ltd. All rights reserved.
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