Per citar aquest document:
Scopus: 5 cites, Web of Science: 8 cites,
Potential use of CeO₂, TiO₂ and Fe₃O₄ nanoparticles for the removal of cadmium from water
Contreras Rodríguez, Ada Rebeca (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química)
García, Ana (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química)
González, Edgar (Institut Català de Nanotecnologia)
Casals Mercadal, Eudald (Institut Català de Nanotecnologia)
Puntes, Víctor (Institut Català de Nanotecnologia)
Sánchez Ferrer, Antoni (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química)
Font i Segura, Xavier (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química)
Recillas, Sonia (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química)

Data: 2012
Resum: Inorganic nanoparticles (NPs) of cerium oxide (CeO₂), iron oxide (Fe₃O₄) and titanium oxide (TiO₂) were studied for the removal of dissolved cadmium from water at concentrations ranging from 25 to 350 mg/L. Adsorption was the predominant mechanism for sequestration, and particularly efficient cadmium removal was demonstrated for Fe₃O₄ NPs. Experimental data were fitted to three different adsorption isotherms: Langmuir, Freundlich and Temkin. The best fit was obtained for the Freundlich isotherm (R² > 0. 96 for all NPs). Adsorption was shown to follow pseudo second-order kinetics (R² ⩾ 0. 91 for all NPs). All three NPs showed some removal of cadmium in aqueous solution, but after 72 h of process, Fe₃O₄ NPs showed a higher capacity of cadmium adsorption (101. 1 mg Cd/g NP) than CeO₂ NPs (49. 1 mg Cd/g NP) or TiO₂ NPs (12. 2 mg Cd/g NP). These results demonstrate the potential use of this NPs to remove dissolved cadmium at high concentrations.
Nota: Financial support was provided by the Spanish Ministerio de Medio Ambiente y Medio Rural y Marino (Project Exp. 007/RN08/03.1). Sonia Recillas thanks Universitat Autònoma de Barcelona for the award of a post-doctoral fellowship.
Drets: Tots els drets reservats
Llengua: Anglès
Document: article ; recerca ; submittedVersion
Matèria: Cadmium ; Adsorption ; Nanoparticles ; Water treatment ; Adsorption kinetics ; Adsorption isotherm
Publicat a: Desalination and water treatment, Vol. 41, Issue 1-3 (2012) , p. 296-300, ISSN 1944-3994

DOI: 10.1080/19443994.2012.664743

17 p, 496.4 KB

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Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Enginyeries > Grup de Recerca en Compostatge (GICOM)
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 Registre creat el 2016-09-22, darrera modificació el 2016-10-03

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