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Open AccessArticle

Kinetic Adsorption Study of Silver Nanoparticles on Natural Zeolite: Experimental and Theoretical Models

Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de Mexico, Querétaro, Qro. 76230, Mexico
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Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Philippe Lambin
Appl. Sci. 2015, 5(4), 1869-1881; https://doi.org/10.3390/app5041869
Received: 6 September 2015 / Revised: 10 November 2015 / Accepted: 1 December 2015 / Published: 16 December 2015
(This article belongs to the Section Nanotechnology and Applied Nanosciences)
In this research, the adsorption capacity of Ag nanoparticles on natural zeolite from Oaxaca is presented. In order to describe the adsorption mechanism of silver nanoparticles on zeolite, experimental adsorption models for Ag ions and Ag nanoparticles were carried out. These experimental data obtained by the atomic absorption spectrophotometry technique were compared with theoretical models such as Lagergren first-order, pseudo-second-order, Elovich, and intraparticle diffusion. Correlation factors R2 of the order of 0.99 were observed. Analysis by transmission electron microscopy describes the distribution of the silver nanoparticles on the zeolite outer surface. Additionally, a chemical characterization of the material was carried out through a dilution process with lithium metaborate. An average value of 9.3 in the Si/Al ratio was observed. Factors such as the adsorption behavior of the silver ions and the Si/Al ratio of the zeolite are very important to support the theoretical models and establish the adsorption mechanism of Ag nanoparticles on natural zeolite. View Full-Text
Keywords: kinetic adsorption; clinoptilolite; Ag nanoparticles; theoretical models kinetic adsorption; clinoptilolite; Ag nanoparticles; theoretical models
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Ruíz-Baltazar, A.; Pérez, R. Kinetic Adsorption Study of Silver Nanoparticles on Natural Zeolite: Experimental and Theoretical Models. Appl. Sci. 2015, 5, 1869-1881.

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