Per citar aquest document: http://ddd.uab.cat/record/163726
Chromium VI adsorption on cerium oxide nanoparticles and morphology changes during the process
Recillas, Sonia (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química)
Colón Jordà, Joan (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química)
Casals Mercadal, Eudald (Institut Català de Nanotecnologia)
González, Edgar (Institut Català de Nanotecnologia)
Puntes, Víctor (Institut Català de Nanotecnologia)
Sánchez Ferrer, Antoni (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química)
Font Segura, Xavier (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química)

Data: 2010
Resum: In this study, suspended cerium oxide nanoparticles stabilized with hexamethylenetetramine were used for the removal of dissolved chromium VI in pure water. Several concentrations of adsorbent and adsorbate were tested, trying to cover a large range of possible real conditions. Results showed that the Freundlich isotherm represented well the adsorption equilibrium reached between nanoparticles and chromium, whereas adsorption kinetics could be modeled by a pseudo-second-order expression. The separation of chromium–cerium nanoparticles from the medium and the desorption of chromium using sodium hydroxide without cerium losses was obtained. Nanoparticles agglomeration and morphological changes during the adsorption–desorption process were observed by TEM. Another remarkable result obtained in this study is the low toxicity in the water treated by nanoparticles measured by the Microtox® commercial method. These results can be used to propose this treatment sequence for a clean and simple removal of drinking water or wastewater re-use when a high toxicity heavy metal such as chromium VI is the responsible for water pollution.
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 and Joan Colón thank Universitat Autònoma de Barcelona for the award of a post-doctoral and pre-doctoral fellowship respectively..
Nota: Número d'acord de subvenció MAPAMA/007/RN08/03.1
Drets: Tots els drets reservats
Llengua: Anglès
Document: article ; recerca ; submittedVersion
Matèria: CeO₂ nanoparticles ; Adsorption ; Desorption ; Kinetics ; Chromium VI ; Toxicity
Publicat a: Journal of hazardous materials, Vol. 184, Issues 1–3 (Dec. 2010) , p. 425–431, ISSN 0304-3894

DOI: 10.1016/j.jhazmat.2010.08.052


Pre-print
31 p, 932.6 KB

El registre apareix a les col·leccions:
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)
Articles > Articles de recerca
Articles > Articles publicats

 Registre creat el 2016-09-08, darrera modificació el 2016-11-29



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