Visible light enhanced Cr(VI) removal from aqueous solution by nanoparticulated zerovalent iron

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(V...

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Detalles Bibliográficos
Autores principales: Montesinos, V.N., Quici, N., Litter, M.I.
Formato: JOUR
Materias:
Hexavalent chromium
Iron oxides
Nanoparticulated zerovalent iron
Visible light
Cr removal
Dark conditions
External layers
Molar ratio
Photocatalytic process
Zero-valent iron
Iron
Chromium compounds
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_15667367_v46_n_p57_Montesinos
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_15667367_v46_n_p57_Montesinos
record_format dspace
spelling todo:paper_15667367_v46_n_p57_Montesinos2023-10-03T16:26:28Z Visible light enhanced Cr(VI) removal from aqueous solution by nanoparticulated zerovalent iron Montesinos, V.N. Quici, N. Litter, M.I. 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 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. Fil:Litter, M.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_15667367_v46_n_p57_Montesinos
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic 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
spellingShingle 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
Montesinos, V.N.
Quici, N.
Litter, M.I.
Visible light enhanced Cr(VI) removal from aqueous solution by nanoparticulated zerovalent iron
topic_facet 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
description 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.
format JOUR
author Montesinos, V.N.
Quici, N.
Litter, M.I.
author_facet Montesinos, V.N.
Quici, N.
Litter, M.I.
author_sort Montesinos, V.N.
title Visible light enhanced Cr(VI) removal from aqueous solution by nanoparticulated zerovalent iron
title_short Visible light enhanced Cr(VI) removal from aqueous solution by nanoparticulated zerovalent iron
title_full Visible light enhanced Cr(VI) removal from aqueous solution by nanoparticulated zerovalent iron
title_fullStr Visible light enhanced Cr(VI) removal from aqueous solution by nanoparticulated zerovalent iron
title_full_unstemmed Visible light enhanced Cr(VI) removal from aqueous solution by nanoparticulated zerovalent iron
title_sort visible light enhanced cr(vi) removal from aqueous solution by nanoparticulated zerovalent iron
url http://hdl.handle.net/20.500.12110/paper_15667367_v46_n_p57_Montesinos
work_keys_str_mv AT montesinosvn visiblelightenhancedcrviremovalfromaqueoussolutionbynanoparticulatedzerovalentiron
AT quicin visiblelightenhancedcrviremovalfromaqueoussolutionbynanoparticulatedzerovalentiron
AT littermi visiblelightenhancedcrviremovalfromaqueoussolutionbynanoparticulatedzerovalentiron
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