Sorption of Antimony (V) onto Synthetic Goethite in Carbonate Medium
| Autor: | Martinez-Llado, X, Martínez Lladó, Xavier, Pablo Ribas, Joan de|||0000-0001-9538-7321, Giménez Izquierdo, Francisco Javier|||0000-0003-2094-4458, Ayora Ibáñez, Carlos, Martí Gregorio, Vicenç|||0000-0002-1763-0514, Rovira Boixaderas, Miquel |
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| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament d'Enginyeria Química, Universitat Politècnica de Catalunya. SETRI - Grup de Tècniques de Separació i Tractament de Residus Industrials, Universitat Politècnica de Catalunya. GHS - Grup d'Hidrologia Subterrània |
| Rok vydání: | 2008 |
| Předmět: |
Goethite
General Chemical Engineering Inorganic chemistry chemistry.chemical_element Langmuir adsorption model Sorption Enginyeria química::Química del medi ambient::Geoquímica [Àrees temàtiques de la UPC] General Chemistry Atmospheric temperature range Enginyeria dels materials [Àrees temàtiques de la UPC] chemistry.chemical_compound symbols.namesake Geochemistry chemistry Antimony Ionic strength visual_art visual_art.visual_art_medium symbols Geoquímica Metalls Arsenic Antimonate |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) Recercat. Dipósit de la Recerca de Catalunya instname |
| ISSN: | 1532-2262 0736-6299 |
| DOI: | 10.1080/07366290802053637 |
| Popis: | The sorption kinetics of antimony(V) on synthetic goethite is very fast compared to the sorption of other metals on goethite (e.g. arsenic and selenium) and depends on temperature, with an activation energy of 49+9 kJ . mol21 in the temperature range 15–358C. Sorption isotherms have been developed at different temperatures and ionic strength values. The results have been modelled using a Langmuir isotherm and there is not a considerable influence of neither the temperature in the range studied (158C–358C), nor the ionic strength (between 0.001 and 0.01 mol . dm23). Sorption is very high at pH values lower than 8, at more alkaline pH, the sorption decreases with pH, as expected considering the Antimony(V) predominating complex in solution, Sb(OH)6 2. Triple-layer model successfully describes the data obtained by assuming a bidentate edge-sharing surface complex of antimonate on the surface of goethite. |
| Databáze: | OpenAIRE |
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