Modified Silica for the Extraction of Cadmium(II), Copper (II) and Zinc(II) Ions from Their Aqueous Solutions
Increasing concentrations of heavy metal ions in aquatic systems have led to a search for very efficient matrices for their removal. Zirconium(IV) phosphate has been used for many years as a cation-exchanger and dispersion of this phosphate on a high surface area silica might be expected to improve...
| Main Authors: | , , |
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| Formato: | Artigo |
| Idioma: | English |
| Publicado em: |
SAGE Publishing
2001-09-01
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| Colecção: | Adsorption Science & Technology |
| Acesso em linha: | https://doi.org/10.1260/0263617011494367 |
| _version_ | 1826905365423325184 |
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| author | L.B. Khalil Amina A. Attia Th. El-Nabarawy |
| author_facet | L.B. Khalil Amina A. Attia Th. El-Nabarawy |
| author_sort | L.B. Khalil |
| collection | DOAJ |
| description | Increasing concentrations of heavy metal ions in aquatic systems have led to a search for very efficient matrices for their removal. Zirconium(IV) phosphate has been used for many years as a cation-exchanger and dispersion of this phosphate on a high surface area silica might be expected to improve the extraction properties of the material. Modified silica matrices (SiZrP) were prepared by refluxing high surface area silica with zirconium tetrachloride dissolved in ethanol, followed by stirring the dried product in an appropriate volume of 0.1 M H 3 PO 4 . The dried SiZrP samples thus obtained were used to extract Cd 2+ , Cu 2+ and Zn 2+ ions from their aqueous solutions under varying conditions. The most efficient SiZrP sample was obtained when ZrCl 4 was allowed to react with the silica in a 1:1 ratio. High extraction of all the ions studied at an initial concentration of 150 ppm was achieved over the pH range 3.5–6.0, with the order of metal ion extraction being Cd 2+ > Cu 2+ > Zn 2+ . |
| first_indexed | 2024-03-07T18:00:51Z |
| format | Article |
| id | doaj.art-9b114545726047b5b91f9713c955bac4 |
| institution | Directory Open Access Journal |
| issn | 0263-6174 2048-4038 |
| language | English |
| last_indexed | 2025-02-17T08:28:17Z |
| publishDate | 2001-09-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj.art-9b114545726047b5b91f9713c955bac42025-01-02T22:37:24ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382001-09-011910.1260/0263617011494367Modified Silica for the Extraction of Cadmium(II), Copper (II) and Zinc(II) Ions from Their Aqueous SolutionsL.B. KhalilAmina A. AttiaTh. El-NabarawyIncreasing concentrations of heavy metal ions in aquatic systems have led to a search for very efficient matrices for their removal. Zirconium(IV) phosphate has been used for many years as a cation-exchanger and dispersion of this phosphate on a high surface area silica might be expected to improve the extraction properties of the material. Modified silica matrices (SiZrP) were prepared by refluxing high surface area silica with zirconium tetrachloride dissolved in ethanol, followed by stirring the dried product in an appropriate volume of 0.1 M H 3 PO 4 . The dried SiZrP samples thus obtained were used to extract Cd 2+ , Cu 2+ and Zn 2+ ions from their aqueous solutions under varying conditions. The most efficient SiZrP sample was obtained when ZrCl 4 was allowed to react with the silica in a 1:1 ratio. High extraction of all the ions studied at an initial concentration of 150 ppm was achieved over the pH range 3.5–6.0, with the order of metal ion extraction being Cd 2+ > Cu 2+ > Zn 2+ .https://doi.org/10.1260/0263617011494367 |
| spellingShingle | L.B. Khalil Amina A. Attia Th. El-Nabarawy Modified Silica for the Extraction of Cadmium(II), Copper (II) and Zinc(II) Ions from Their Aqueous Solutions Adsorption Science & Technology |
| title | Modified Silica for the Extraction of Cadmium(II), Copper (II) and Zinc(II) Ions from Their Aqueous Solutions |
| title_full | Modified Silica for the Extraction of Cadmium(II), Copper (II) and Zinc(II) Ions from Their Aqueous Solutions |
| title_fullStr | Modified Silica for the Extraction of Cadmium(II), Copper (II) and Zinc(II) Ions from Their Aqueous Solutions |
| title_full_unstemmed | Modified Silica for the Extraction of Cadmium(II), Copper (II) and Zinc(II) Ions from Their Aqueous Solutions |
| title_short | Modified Silica for the Extraction of Cadmium(II), Copper (II) and Zinc(II) Ions from Their Aqueous Solutions |
| title_sort | modified silica for the extraction of cadmium ii copper ii and zinc ii ions from their aqueous solutions |
| url | https://doi.org/10.1260/0263617011494367 |
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