Study of biodiesel photodegradation through reactions catalyzed by Fenton's reagent

• Autor(a) principal: Ambrosio,Elizangela
• Data de Publicação: 2014
• Outros Autores: Milano,Lorena M., Souza,Maísa Tatiane F. de, Chiavelli,Lucas U. R., Montanher,Paula F., Visentainer,Jesuí V., Almeida,Vitor de C., Souza,Nilson E., Garcia,Juliana C.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Journal of the Brazilian Chemical Society (Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532014000400018
• topic: photodegradation; Fenton reactions; biodiesel; bioassay; advanced oxidation processes

This study reports on the photodegradation of biodiesel in contact with water using the photo-Fenton reaction. After 360 h of photodegradation, we observed a reduction of 73% in the amount of fatty acid methyl esters (FAMEs) initially quantified by gas chromatography coupled with a flame ionization detector (GC/FID). During the photodegradation, peaks for ketones and epoxy groups in carbon chains were recorded by gas chromatography coupled with mass spectrometry (GC/MS), and typical aldehyde and short-chain fatty acid shifts in hydrogen nuclear magnetic resonance spectroscopy (¹H NMR) were observed. Ecotoxicity assays with Artemia salina revealed the presence of toxic components in the aqueous phase in increasing amounts up to 168 h of photodegradation and decreasing thereafter.