Title:
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Potential use of CeO₂, TiO₂ and Fe₃O₄ nanoparticles for the removal of cadmium from water
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Author:
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Contreras Rodríguez, Ada Rebeca; García, Ana; González, Edgar E.; Casals, Eudald; Puntes, Víctor; Sanchez, Antoni; Font i Segura, Xavier; Recillas, Sonia
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Abstract:
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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. |
Abstract:
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Altres ajuts: MAPAMA/007/RN08/03.1 |
Abstract:
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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. |
Subject(s):
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-Cadmium -Adsorption -Nanoparticles -Water treatment -Adsorption kinetics -Adsorption isotherm |
Rights:
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open access
Tots els drets reservats.
https://rightsstatements.org/vocab/InC/1.0/ |
Document type:
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Article |
Published by:
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Share:
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Uri:
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https://ddd.uab.cat/record/164370
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