Dye-sensitized photodegradation of the fungicide carbendazim and related benzimidazoles

Utilización de Cromatografía Líquida de Alta Eficiencia (HPLC) para determinar consumo de sustrato

“…Uno de los métodos para seguir la desaparición de los compuestos en estudio está basado en la propiedad que presentan la mayoría de los compuestos orgánicos de absorber radiación en el rango del ultravioleta o del visible. Es profusa la bibliografía existente de empleo de esta metodología en el estudio de los mecanismos de fotodegradación (Haag W. R, 1994;Escalada et al, 2006;Escalada et al, 2008) Un método sencillo y atractivo por su alta eficiencia y fácil manejo para la eliminación de efluentes en fase acuosa que contienen fenol o sus derivados, es la adsorción. .…”

Photodegradation of Environmental Mutagens by Visible Irradiation in the Presence of Xanthene Dyes as Photosensitizers

“…Effect of O 2 Removal on Photodegradation Amat-Guerri et al 37) reported that singlet molecular oxygen ( 1 O 2 ) was predominantly generated for visible irradiation of rose bengal in aqueous solution. In fact, Escalada et al 38) investigated photodegradation of the fungicide (carbendazim) by visible irradiation in the present of rose bengal, and demonstrated that photodegradation operated via a singlet molecular oxygen ( 1 O 2 ) generated during irradiation. To investigate the participation of active oxygen species derived from O 2 in photodegradation, O 2 was removed from the reaction solution for the photodegradation of 2,7-DaF.…”

Interpretation and modelling of environmental behaviour of diverse pesticides by revealing photodecomposition mechanisms

“…It inhibits fungal mitotic microtubule formation. The visible-light-promoted photodegradation of carbendazim was studied in water or water-methanol solution under various conditions (in the presence of air and a photosensitizer xanthene dye or pigment riboflavin, at various pH values (Escalada et al, 2006, Panades et al, 2000, Mazellier et al, 2002. It was established that the rate of photodegradation increased with pH and oxygen concentrations.…”