), respectively. Compounds that were more persistent during continuous oxidation were characterized by the presence of electrophilic groups on the aromatic ring (e.g. triclopyr) or by the absence of stronger nucleophilic substituents (e.g. ibuprofen).These pollutants were oxidized when applying higher specific electrical charge in batch mode (i.e. 1.45 kA h m À3 ROC). However, baseline toxicity as determined by Vibrio fischeri bioluminescence inhibition tests (Microtox) was increasing with higher applied charge during batch and continuous oxidation, indicating the formation of toxic oxidation products, possibly chlorinated and brominated organic compounds. ª 2010 Elsevier Ltd. All rights reserved.* Corresponding author. Tel.: þ61 7 3346 3234; fax: þ61 7 3365 4726. E-mail address: j.radjenovic@awmc.uq.edu.au (J. Radjenovic).A v a i l a b l e a t w w w . s c i e n c e d i r e c t . c o m j o u r n a l h o m e p a g e : w w w . e l s e v i e r . c o m / l o c a t e / w a t r e s w a t e r r e s e a r c h 4 5 ( 2 0 1 1 ) 1 5 7 9 e1 5 8 6
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