Oxidative photodegradation of herbicide fenuron in aqueous solution by natural iron oxide α-Fe2O3, influence of polycarboxylic acids

The photodegradation of the herbicide fenuron (1,1-dimethyl-3-phenylurea) by using a natural iron oxide (NIO), α-Fe2O3, in aqueous solution at acidic pH has been undertaken. The NIO was characterized by the Raman spectroscopy method. The degradation pathways and the formation of degradation products...

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Veröffentlicht in:Environmental technology. - 1998. - 37(2016), 2 vom: 19., Seite 172-82
1. Verfasser: Kribéche, Mohamed El Amine (VerfasserIn)
Weitere Verfasser: Mechakra, Hind, Sehili, Tahar, Brosillon, Stephan
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2016
Zugriff auf das übergeordnete Werk:Environmental technology
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Fe(III)–oxalate complex fenuron hydroxyl radicals natural iron oxide photodegradation Carboxylic Acids Ferric Compounds Herbicides mehr... Phenylurea Compounds ferric oxide 1K09F3G675 O7L040435W
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520 |a The photodegradation of the herbicide fenuron (1,1-dimethyl-3-phenylurea) by using a natural iron oxide (NIO), α-Fe2O3, in aqueous solution at acidic pH has been undertaken. The NIO was characterized by the Raman spectroscopy method. The degradation pathways and the formation of degradation products were studied. A high-pressure mercury lamp and sunlight were employed as light source. Fenuron photodegradation using NIO with oxalic acid followed the pseudo-first-order kinetics, the optimal experimental conditions were [oxalic acid]0 = 10(-3) M and [NIO] = 0.1 g L(-1) at pH 3. A UVA/NIO/oxalic acid system led to a low fenuron half-life (60 min). The results were even better when solar light is used (30 min). The variables studied were the doses of iron oxide, of carboxylic acids, the solution pH and the effect of sunlight irradiation. The effects of four carboxylic acids, oxalic, citric, tartaric and malic acids, on the fenuron photodegradation with NIO have been investigated, oxalic acid was the most effective carboxylic acid used at pH 3. A similar trend was observed for the removal of total organic carbon (TOC), 75% of TOC was removed. The analytical study showed many aromatic intermediates, short-chain carboxylic acids and inorganic ion 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a Fe(III)–oxalate complex 
650 4 |a fenuron 
650 4 |a hydroxyl radicals 
650 4 |a natural iron oxide 
650 4 |a photodegradation 
650 7 |a Carboxylic Acids  |2 NLM 
650 7 |a Ferric Compounds  |2 NLM 
650 7 |a Herbicides  |2 NLM 
650 7 |a Phenylurea Compounds  |2 NLM 
650 7 |a ferric oxide  |2 NLM 
650 7 |a 1K09F3G675  |2 NLM 
650 7 |a fenuron  |2 NLM 
650 7 |a O7L040435W  |2 NLM 
700 1 |a Mechakra, Hind  |e verfasserin  |4 aut 
700 1 |a Sehili, Tahar  |e verfasserin  |4 aut 
700 1 |a Brosillon, Stephan  |e verfasserin  |4 aut 
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773 1 8 |g volume:37  |g year:2016  |g number:2  |g day:19  |g pages:172-82 
856 4 0 |u http://dx.doi.org/10.1080/09593330.2015.1065008  |3 Volltext 
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