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Simultaneous Adsorption and Degradation of Cr(VI) and Cd(II) Ions from Aqueous Solution by Silica-Coated Fe(0) Nanoparticles

Core-shell silica-coated Fe(0) nanoparticles (Fe@SiO(2)) were prepared in one-step synthesis by aqueous reduction combined with modified Stöber method. The as-prepared Fe@SiO(2) were then used for simultaneous removal of Cr(VI) and Cd(II) from aqueous solution. Batch tests indicated that Fe@SiO(2) e...

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Detalles Bibliográficos
Autores principales: Li, Yongchao, Ma, Hongpu, Ren, Bozhi, Li, Tielong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi Publishing Corporation 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3876921/
https://www.ncbi.nlm.nih.gov/pubmed/24455425
http://dx.doi.org/10.1155/2013/649503
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author Li, Yongchao
Ma, Hongpu
Ren, Bozhi
Li, Tielong
author_facet Li, Yongchao
Ma, Hongpu
Ren, Bozhi
Li, Tielong
author_sort Li, Yongchao
collection PubMed
description Core-shell silica-coated Fe(0) nanoparticles (Fe@SiO(2)) were prepared in one-step synthesis by aqueous reduction combined with modified Stöber method. The as-prepared Fe@SiO(2) were then used for simultaneous removal of Cr(VI) and Cd(II) from aqueous solution. Batch tests indicated that Fe@SiO(2) exhibited high removal capacity toward Cr(VI) and Cd(II). Cr(VI) was removed by Fe@SiO(2) through reduction rather than adsorption, while Cd(II) removal was mainly through adsorption. The removal rate increased with increasing initial Fe NPs dose and decreased with increasing initial Cr(VI) and Cd(II) concentrations. Cd(II) adsorption was also strengthened by Cr(VI) reduction with the release of OH(−). The removals of Cr(VI) and Cd(II) were weakened in the presence of cations or humic acid, as a result of aggregation and less active site of Fe@SiO(2). Overall, the simply prepared Fe@SiO(2) were potential material for the heavy metals removed from water.
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spelling pubmed-38769212014-01-16 Simultaneous Adsorption and Degradation of Cr(VI) and Cd(II) Ions from Aqueous Solution by Silica-Coated Fe(0) Nanoparticles Li, Yongchao Ma, Hongpu Ren, Bozhi Li, Tielong J Anal Methods Chem Research Article Core-shell silica-coated Fe(0) nanoparticles (Fe@SiO(2)) were prepared in one-step synthesis by aqueous reduction combined with modified Stöber method. The as-prepared Fe@SiO(2) were then used for simultaneous removal of Cr(VI) and Cd(II) from aqueous solution. Batch tests indicated that Fe@SiO(2) exhibited high removal capacity toward Cr(VI) and Cd(II). Cr(VI) was removed by Fe@SiO(2) through reduction rather than adsorption, while Cd(II) removal was mainly through adsorption. The removal rate increased with increasing initial Fe NPs dose and decreased with increasing initial Cr(VI) and Cd(II) concentrations. Cd(II) adsorption was also strengthened by Cr(VI) reduction with the release of OH(−). The removals of Cr(VI) and Cd(II) were weakened in the presence of cations or humic acid, as a result of aggregation and less active site of Fe@SiO(2). Overall, the simply prepared Fe@SiO(2) were potential material for the heavy metals removed from water. Hindawi Publishing Corporation 2013 2013-12-15 /pmc/articles/PMC3876921/ /pubmed/24455425 http://dx.doi.org/10.1155/2013/649503 Text en Copyright © 2013 Yongchao Li et al. https://creativecommons.org/licenses/by/3.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Li, Yongchao
Ma, Hongpu
Ren, Bozhi
Li, Tielong
Simultaneous Adsorption and Degradation of Cr(VI) and Cd(II) Ions from Aqueous Solution by Silica-Coated Fe(0) Nanoparticles
title Simultaneous Adsorption and Degradation of Cr(VI) and Cd(II) Ions from Aqueous Solution by Silica-Coated Fe(0) Nanoparticles
title_full Simultaneous Adsorption and Degradation of Cr(VI) and Cd(II) Ions from Aqueous Solution by Silica-Coated Fe(0) Nanoparticles
title_fullStr Simultaneous Adsorption and Degradation of Cr(VI) and Cd(II) Ions from Aqueous Solution by Silica-Coated Fe(0) Nanoparticles
title_full_unstemmed Simultaneous Adsorption and Degradation of Cr(VI) and Cd(II) Ions from Aqueous Solution by Silica-Coated Fe(0) Nanoparticles
title_short Simultaneous Adsorption and Degradation of Cr(VI) and Cd(II) Ions from Aqueous Solution by Silica-Coated Fe(0) Nanoparticles
title_sort simultaneous adsorption and degradation of cr(vi) and cd(ii) ions from aqueous solution by silica-coated fe(0) nanoparticles
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3876921/
https://www.ncbi.nlm.nih.gov/pubmed/24455425
http://dx.doi.org/10.1155/2013/649503
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