Removal of oxalic acid, oxamic acid and aniline by a combined photolysis and ozonation process

Aniline (ANL), an aromatic amine, oxalic acid (OXA) and oxamic acid (OMA), short-chain carboxylic acids, were chosen as model organic pollutants for testing the combined effect of neat photolysis and ozonation in the treatment of aqueous effluents. In order to better understand the results, single o...

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Veröffentlicht in:Environmental technology. - 1998. - 36(2015), 9-12 vom: 13. Mai, Seite 1075-83
1. Verfasser: Orge, C A (VerfasserIn)
Weitere Verfasser: Faria, J L, Pereira, M F R
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2015
Zugriff auf das übergeordnete Werk:Environmental technology
Schlagworte:Evaluation Study Journal Article Research Support, Non-U.S. Gov't aniline carboxylic acids ozonation photo-ozonation photolysis Aniline Compounds Water Pollutants, Chemical mehr... Ozone 66H7ZZK23N Oxalic Acid 9E7R5L6H31 Oxamic Acid QU60N5OPLG SIR7XX2F1K
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520 |a Aniline (ANL), an aromatic amine, oxalic acid (OXA) and oxamic acid (OMA), short-chain carboxylic acids, were chosen as model organic pollutants for testing the combined effect of neat photolysis and ozonation in the treatment of aqueous effluents. In order to better understand the results, single ozonation and neat photolysis were also carried out. OXA has a high refractory character relatively to single ozonation and neat photolysis only accounted for 26% conversion of OXA after 2 h of reaction. On the other hand, OXA complete degradation was observed in less than an hour when ozone and light were used simultaneously. Despite OMA, a compound never studied before by a combined ozonation and photolysis treatment, being highly refractory to oxidation, more than 50% was removed by photo-ozonation after 3 h of reaction. In the case of ANL, both single ozonation and photo-ozonation resulted in 100% removal in a short reaction period due to the high reactivity of ozone to attack this type of molecules; however, only the combined method leads to efficient mineralization (89%) after 3 h of reaction. A significant synergetic effect was observed in the degradation of the selected contaminants by the simultaneous use of ozone and light, since the mineralization rate of combined method is higher than the sum of the mineralization rates of the individual treatments. The promising results observed in the degradation of the selected contaminants are paving the way to the application of photo-ozonation in the treatment of wastewater containing this type of pollutants 
650 4 |a Evaluation Study 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a aniline 
650 4 |a carboxylic acids 
650 4 |a ozonation 
650 4 |a photo-ozonation 
650 4 |a photolysis 
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650 7 |a Water Pollutants, Chemical  |2 NLM 
650 7 |a Ozone  |2 NLM 
650 7 |a 66H7ZZK23N  |2 NLM 
650 7 |a Oxalic Acid  |2 NLM 
650 7 |a 9E7R5L6H31  |2 NLM 
650 7 |a Oxamic Acid  |2 NLM 
650 7 |a QU60N5OPLG  |2 NLM 
650 7 |a aniline  |2 NLM 
650 7 |a SIR7XX2F1K  |2 NLM 
700 1 |a Faria, J L  |e verfasserin  |4 aut 
700 1 |a Pereira, M F R  |e verfasserin  |4 aut 
773 0 8 |i Enthalten in  |t Environmental technology  |d 1998  |g 36(2015), 9-12 vom: 13. Mai, Seite 1075-83  |w (DE-627)NLM098202545  |x 0959-3330  |7 nnns 
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