Gold and silver uptake and nanoprecipitation on calcium alginate beads
Calcium alginate beads were investigated for their biosorption performance in the removal of gold and silver from aqueous solutions. It was found that uptake capacities were significantly affected by the solution pH, with optimum pH values of 2 and 4 for gold and silver, respectively. Kinetic and is...
| Publié dans: | Langmuir : the ACS journal of surfaces and colloids. - 1985. - 21(2005), 17 vom: 16. Aug., Seite 7951-8 |
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| Auteur principal: | |
| Autres auteurs: | , , , , |
| Format: | Article |
| Langue: | English |
| Publié: |
2005
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| Accès à la collection: | Langmuir : the ACS journal of surfaces and colloids |
| Sujets: | Journal Article Research Support, Non-U.S. Gov't Alginates Hexuronic Acids Solutions Silver 3M4G523W1G Gold 7440-57-5 Glucuronic Acid |
| Résumé: | Calcium alginate beads were investigated for their biosorption performance in the removal of gold and silver from aqueous solutions. It was found that uptake capacities were significantly affected by the solution pH, with optimum pH values of 2 and 4 for gold and silver, respectively. Kinetic and isotherm experiments were carried out at the optimum pH. The maximum uptake capacities were 290 mg/g for Au and 52 mg/g for Ag. FTIR analysis indicated that both carboxylic and hydroxylic functional groups in alginate beads are involved in the metal binding and later reduction of gold (+3) and silver (+1) to gold (0) and silver (0). SEM and X-ray diffraction confirmed the formation of gold and silver nanoparticles |
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| Description: | Date Completed 03.04.2007 Date Revised 01.12.2018 published: Print Citation Status MEDLINE |
| ISSN: | 1520-5827 |