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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Study on determination and removal of metallic ions from aqueous and alcoholic solutions using a new POSS adsorbent

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Author(s):
Vieira, Eduardo G. [1] ; Soares, Isaac V. [1] ; Pires, Geovanna [2] ; Ramos, Ricardo A. V. [3] ; do Carmo, Devaney R. [1] ; Dias Filho, Newton L. [1]
Total Authors: 6
Affiliation:
[1] Unesp Univ Estadual Paulista, Dept Fis & Quim, BR-15385000 Ilha Solteira, SP - Brazil
[2] Univ Estadual Campinas, Inst Quim, BR-13084971 Campinas, SP - Brazil
[3] Unesp Univ Estadual Paulista, Dept Engn Mecan, BR-15385000 Ilha Solteira, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: CHEMICAL ENGINEERING JOURNAL; v. 264, p. 77-88, MAR 15 2015.
Web of Science Citations: 12
Abstract

In this study, a new nanostructured organosilicate, named Octakis{[}(thiourea)propyl] octasilsesquioxane (POSS-Pr-THIO) was prepared, characterized and used for determination and removal of the ions Fe3+, Cr3+, V3+ and Zn2+ and compared with 3-{[}(thiourea) propyl] silica gel (SG-Pr-THIO). To the best of our knowledge, this study is the first that has reported the preparation of POSS-Pr-THIO and the comparison with its analogous SG-Pr-THIO for removal by batch and column experiments of toxics metals from natural waters, fuel ethanol and sugar-cane spirits. Langmuir and pseudo-second order models were the most appropriate to describe the adsorption and kinetic data respectively. Thermodynamic functions showed a feasible, spontaneous and endothermic process. The method of quantitative analysis of metal ions in natural waters, fuel ethanol and sugar-cane spirits by Flame AAS was validated using, namely, linearity, limit of detection, limit of quantification, and the relative standard deviation and accuracy. The results obtained in the flow of experiments in natural waters, fuel ethanol and sugar-cane spirit solutions, showed a recovery of nearly 100% of the metal ions adsorbed in a column packed with 1.0 g of material, using 5 mL of 1.0 M HCl solution as eluent (C) 2014 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 13/24602-0 - Synthesis and characterization of polyhedral oligomeric silsesquioxanes and their applications in process of adsorption and catalysis
Grantee:Newton Luiz Dias Filho
Support Opportunities: Regular Research Grants