R
Rodrigo Silveira Vieira
Researcher at Federal University of Ceará
Publications - 91
Citations - 3253
Rodrigo Silveira Vieira is an academic researcher from Federal University of Ceará. The author has contributed to research in topics: Adsorption & Chitosan. The author has an hindex of 24, co-authored 76 publications receiving 2569 citations. Previous affiliations of Rodrigo Silveira Vieira include State University of Campinas.
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Crosslinking of chitosan membranes using glutaraldehyde: Effect on ion permeability and water absorption
TL;DR: In this article, the authors used Potentiometric titration, infrared spectroscopy (FTIR-ATR) and thermal gravimetric analyses (TGA) to identify differences between pristine and crosslinked chitosan membranes.
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Copper, mercury and chromium adsorption on natural and crosslinked chitosan films: An XPS investigation of mechanism
Rodrigo Silveira Vieira,Mona Lisa Moura de Oliveira,Eric Guibal,Enrique Rodríguez-Castellón,Marisa Masumi Beppu +4 more
TL;DR: In this article, copper, chromium and mercury ions were adsorbed on natural and crosslinked (glutaraldehyde and epichlorohydrin) chitosan matrices, which present diverse functional groups and may induce different adsorption mechanisms.
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Dynamic and static adsorption and desorption of Hg(II) ions on chitosan membranes and spheres.
TL;DR: A process combining dynamic adsorption and static desorption can be used to concentrate the Hg(II) ions by a factor of nearly seven (7x), when compared to the initially treated volume.
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Interaction of natural and crosslinked chitosan membranes with Hg(II) ions
TL;DR: In this article, the adsorption and desorption of Hg(II) ions on chitosan membranes was performed. But the results showed that the amount of adsorbed Hg-II ions increased when the adsorbent was crosslinked, mainly with glutaraldehyde.
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Adsorption of CO2 on nitrogen-enriched activated carbon and zeolite 13X
Diogo Pereira Bezerra,Ronan S. Oliveira,Rodrigo Silveira Vieira,Célio L. Cavalcante,Diana C. S. Azevedo +4 more
TL;DR: In this paper, commercial adsorbents have been impregnated with monoethanolamine (MEA) and triethanolamines (TEA) to investigate the effect of modified surface chemistry on CO2 adsorption, especially above room temperature.