Simultaneous Adsorption and Degradation of Cr(VI) and Cd(II) Ions from Aqueous Solution by Silica-Coated Fe0 Nanoparticles
Core-shell silica-coated Fe0 nanoparticles (Fe@SiO2) were prepared in one-step synthesis by aqueous reduction combined with modified Stöber method. The as-prepared Fe@SiO2 were then used for simultaneous removal of Cr(VI) and Cd(II) from aqueous solution. Batch tests indicated that Fe@SiO2 exhibited...
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | Journal of Analytical Methods in Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2013/649503 |
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| author | Yongchao Li Hongpu Ma Bozhi Ren Tielong Li |
| author_facet | Yongchao Li Hongpu Ma Bozhi Ren Tielong Li |
| author_sort | Yongchao Li |
| collection | DOAJ |
| description | Core-shell silica-coated Fe0 nanoparticles (Fe@SiO2) were prepared in one-step synthesis by aqueous reduction combined with modified Stöber method. The as-prepared Fe@SiO2 were then used for simultaneous removal of Cr(VI) and Cd(II) from aqueous solution. Batch tests indicated that Fe@SiO2 exhibited high removal capacity toward Cr(VI) and Cd(II). Cr(VI) was removed by Fe@SiO2 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@SiO2. Overall, the simply prepared Fe@SiO2 were potential material for the heavy metals removed from water. |
| format | Article |
| id | doaj-art-f1c7e11cc8e34db19815dd0b1352e53f |
| institution | Kabale University |
| issn | 2090-8865 2090-8873 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Analytical Methods in Chemistry |
| spelling | doaj-art-f1c7e11cc8e34db19815dd0b1352e53f2025-02-03T01:22:03ZengWileyJournal of Analytical Methods in Chemistry2090-88652090-88732013-01-01201310.1155/2013/649503649503Simultaneous Adsorption and Degradation of Cr(VI) and Cd(II) Ions from Aqueous Solution by Silica-Coated Fe0 NanoparticlesYongchao Li0Hongpu Ma1Bozhi Ren2Tielong Li3School of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, ChinaSchool of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, ChinaSchool of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, ChinaCollege of Environmental Science and Engineering, Nankai University, Tianjin 300071, ChinaCore-shell silica-coated Fe0 nanoparticles (Fe@SiO2) were prepared in one-step synthesis by aqueous reduction combined with modified Stöber method. The as-prepared Fe@SiO2 were then used for simultaneous removal of Cr(VI) and Cd(II) from aqueous solution. Batch tests indicated that Fe@SiO2 exhibited high removal capacity toward Cr(VI) and Cd(II). Cr(VI) was removed by Fe@SiO2 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@SiO2. Overall, the simply prepared Fe@SiO2 were potential material for the heavy metals removed from water.http://dx.doi.org/10.1155/2013/649503 |
| spellingShingle | Yongchao Li Hongpu Ma Bozhi Ren Tielong Li Simultaneous Adsorption and Degradation of Cr(VI) and Cd(II) Ions from Aqueous Solution by Silica-Coated Fe0 Nanoparticles Journal of Analytical Methods in Chemistry |
| title | Simultaneous Adsorption and Degradation of Cr(VI) and Cd(II) Ions from Aqueous Solution by Silica-Coated Fe0 Nanoparticles |
| title_full | Simultaneous Adsorption and Degradation of Cr(VI) and Cd(II) Ions from Aqueous Solution by Silica-Coated Fe0 Nanoparticles |
| title_fullStr | Simultaneous Adsorption and Degradation of Cr(VI) and Cd(II) Ions from Aqueous Solution by Silica-Coated Fe0 Nanoparticles |
| title_full_unstemmed | Simultaneous Adsorption and Degradation of Cr(VI) and Cd(II) Ions from Aqueous Solution by Silica-Coated Fe0 Nanoparticles |
| title_short | Simultaneous Adsorption and Degradation of Cr(VI) and Cd(II) Ions from Aqueous Solution by Silica-Coated Fe0 Nanoparticles |
| title_sort | simultaneous adsorption and degradation of cr vi and cd ii ions from aqueous solution by silica coated fe0 nanoparticles |
| url | http://dx.doi.org/10.1155/2013/649503 |
| work_keys_str_mv | AT yongchaoli simultaneousadsorptionanddegradationofcrviandcdiiionsfromaqueoussolutionbysilicacoatedfe0nanoparticles AT hongpuma simultaneousadsorptionanddegradationofcrviandcdiiionsfromaqueoussolutionbysilicacoatedfe0nanoparticles AT bozhiren simultaneousadsorptionanddegradationofcrviandcdiiionsfromaqueoussolutionbysilicacoatedfe0nanoparticles AT tielongli simultaneousadsorptionanddegradationofcrviandcdiiionsfromaqueoussolutionbysilicacoatedfe0nanoparticles |