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Abstract:

Cr(VI) removal using nanoparticulated zerovalent iron is enhanced under visible light in comparison with the dark process. Using an Fe:Cr(VI) molar ratio (MR) of 1, 77% removal was obtained after two hours under irradiation, compared with 60% in dark conditions; use of MR 2 allowed almost total Cr(VI) removal. Experiments with selected filters indicated that active wavelengths are above 555 nm. The proposed mechanism involves a heterogeneous photocatalytic process promoted by the iron oxides present as an external layer of the nanoparticles acting as semiconductors after excitation with light, overcoming the passivation of the material taking place in the dark. © 2013 Elsevier B.V.

Registro:

Documento: Artículo
Título:Visible light enhanced Cr(VI) removal from aqueous solution by nanoparticulated zerovalent iron
Autor:Montesinos, V.N.; Quici, N.; Litter, M.I.
Filiación:Gerencia Química, Comisión Nacional de Energía Atómica, Av. Gral. Paz 1499, 1650 San Martín, Prov. de Buenos Aires, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas, Av. Rivadavia 1917, 1033 Buenos Aires, Argentina
Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Pab. 2, 1428 Buenos Aires, Argentina
Instituto de Investigación e Ingeniería Ambiental, Universidad Nacional de Gral. San Martín, Campus Miguelete, 25 de Mayo y Francia, 1650 San Martín, Prov. de Buenos Aires, Argentina
Palabras clave:Hexavalent chromium; Iron oxides; Nanoparticulated zerovalent iron; Visible light; Cr removal; Dark conditions; External layers; Hexavalent chromium; Molar ratio; Photocatalytic process; Visible light; Zero-valent iron; Iron; Iron oxides; Chromium compounds
Año:2014
Volumen:46
Página de inicio:57
Página de fin:60
DOI: http://dx.doi.org/10.1016/j.catcom.2013.11.024
Título revista:Catalysis Communications
Título revista abreviado:Catal. Commun.
ISSN:15667367
CODEN:CCAOA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15667367_v46_n_p57_Montesinos

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Citas:

---------- APA ----------
Montesinos, V.N., Quici, N. & Litter, M.I. (2014) . Visible light enhanced Cr(VI) removal from aqueous solution by nanoparticulated zerovalent iron. Catalysis Communications, 46, 57-60.
http://dx.doi.org/10.1016/j.catcom.2013.11.024
---------- CHICAGO ----------
Montesinos, V.N., Quici, N., Litter, M.I. "Visible light enhanced Cr(VI) removal from aqueous solution by nanoparticulated zerovalent iron" . Catalysis Communications 46 (2014) : 57-60.
http://dx.doi.org/10.1016/j.catcom.2013.11.024
---------- MLA ----------
Montesinos, V.N., Quici, N., Litter, M.I. "Visible light enhanced Cr(VI) removal from aqueous solution by nanoparticulated zerovalent iron" . Catalysis Communications, vol. 46, 2014, pp. 57-60.
http://dx.doi.org/10.1016/j.catcom.2013.11.024
---------- VANCOUVER ----------
Montesinos, V.N., Quici, N., Litter, M.I. Visible light enhanced Cr(VI) removal from aqueous solution by nanoparticulated zerovalent iron. Catal. Commun. 2014;46:57-60.
http://dx.doi.org/10.1016/j.catcom.2013.11.024