Application of Novel Fulvic Acid-Coated Magnetite Nanoparticles for CO<SUB>2</SUB>−-Mediated Photoreduction of Cr(VI)

We here isolate fulvic acids from vermicompost to prepare and characterize novel fulvic acid-coated magnetite nanoparticles. UV-A irradiation of suspensions of the nanoparticles under different experimental conditions led to photoreduction of Cr(VI). In anoxic conditions in the presence of formic ac...

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Detalles Bibliográficos
Autores principales: Arce, Valeria Beatriz, Mucci, Carla Romina, Fernández Solarte, Alejandra María, Torres Sánchez, Rosa María, Mártire, Daniel Osvaldo
Formato: Articulo
Lenguaje:Inglés
Publicado: 2018
Materias:
Química
Fulvic acids
Magnetic nanoparticles
Photo-reduction
Cr(VI)
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/113794
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
Descripción
Sumario:We here isolate fulvic acids from vermicompost to prepare and characterize novel fulvic acid-coated magnetite nanoparticles. UV-A irradiation of suspensions of the nanoparticles under different experimental conditions led to photoreduction of Cr(VI). In anoxic conditions in the presence of formic acid, after 60 min of irradiation ca. 100% of Cr(VI) was reduced. Under these conditions, the carbon dioxide radical anions, CO2 .-, mediated the photo-reduction of Cr(VI). However, the high reduction potential of Cr(VI) and the variety of reactive species generated upon UV-A irradiation make this nanomaterial also suitable for Cr(VI) photo-reduction also under aerobic conditions in the presence of formic acid or under anoxic conditions without the addition of formic acid. The possible photodegradation routes involved are discussed in detail.

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