Direct and indirect photolysis of two quinolinecarboxylic herbicides in aqueous systems
Academic Article
Publication Date:
2012
Short description:
Direct and indirect photolysis of two quinolinecarboxylic herbicides
in aqueous systems / Pinna, M.V., Pusino, A.. - In: CHEMOSPHERE. - ISSN 0045-6535. - 86:(2012), pp. 655-658. [10.1016/j.chemosphere.2011.11.016]
abstract:
The photodegradation of two quinolinecarboxylic herbicides, 7-chloro-3-methylquinoline-8-carboxylic
acid (QMe) and 3,7-dichloroquinoline-8-carboxylic acid (QCl), was studied in aqueous solution at different
irradiation wavelengths. The effect of sunlight irradiation was investigated also in the presence of
titanium dioxide (TiO2). UV irradiation degraded rapidly QMe affording 7-chloro-3-methylquinoline
(MeQ) through a decarboxylation reaction. The reaction rate was lower in the presence of dissolved
organic carbon (DOC) because of the adsorption of the herbicide on the organic components. Instead,
QCl was stable under both UV light and sunlight irradiation. The irradiation of QMe or QCl solutions with
simulated sunlight in the presence of TiO2 produced the complete mineralization of the two herbicides.
acid (QMe) and 3,7-dichloroquinoline-8-carboxylic acid (QCl), was studied in aqueous solution at different
irradiation wavelengths. The effect of sunlight irradiation was investigated also in the presence of
titanium dioxide (TiO2). UV irradiation degraded rapidly QMe affording 7-chloro-3-methylquinoline
(MeQ) through a decarboxylation reaction. The reaction rate was lower in the presence of dissolved
organic carbon (DOC) because of the adsorption of the herbicide on the organic components. Instead,
QCl was stable under both UV light and sunlight irradiation. The irradiation of QMe or QCl solutions with
simulated sunlight in the presence of TiO2 produced the complete mineralization of the two herbicides.
Iris type:
1.1 Articolo in rivista
List of contributors:
Pinna, Maria Vittoria; Pusino, Alba
Published in: