Artículo
Heterogeneous photocatalytic removal of U(VI) in the presence of formic acid: U(III) formation
Fecha de publicación:
06/2015
Editorial:
Elsevier Science Sa
Revista:
Chemical Engineering Journal
ISSN:
1385-8947
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The efficiency of TiO2 heterogeneous photocatalysis under UV-visible light for removal of uranyl (UO22+) (0.25mM, pH 3) in the presence of formic acid (HCOOH) was investigated. The effect of the counterion of the uranium salt (perchlorate and acetate-nitrate) and the use of quartz and glass photoreactors were analyzed. The transformation of U(VI) in the presence of HCOOH was significantly high and the best removal conditions have been established. The highest efficiency was observed for uranyl perchlorate in the quartz photoreactor with 0.001M HCOOH, while uranyl acetate yielded a lower removal. HCOOH concentrations >0.01M provoked uranium reoxidation. U(VI) photocatalytic transformation was also studied by direct spectrophotometry using TiO2 nanoparticles in the presence of 1M HCOOH at pH<2. U(V), U(IV) and U(III) were detected. U(III) formation was also apparent in the absence of the photocatalyst. This is the first time that formation of U(III) in a photochemical U(VI) system is reported.
Palabras clave:
Formic Acid
,
Heterogeneous Photocatalysis
,
U(Iii)
,
U(Vi)
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Articulos(SEDE CENTRAL)
Articulos de SEDE CENTRAL
Articulos de SEDE CENTRAL
Citación
Salomone, Vanesa Natalia; Meichtry, Jorge Martin; Litter, Marta Irene; Heterogeneous photocatalytic removal of U(VI) in the presence of formic acid: U(III) formation; Elsevier Science Sa; Chemical Engineering Journal; 270; 6-2015; 28-35
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