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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 soluble heavy metals with preconcentration by using a new modified oligosilsesquioxane sorbent

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Author(s):
Vieira, Eduardo G. [1] ; Soares, Isaac V. [1] ; Dias Filho, Newton L. [1] ; da Silva, Nileia C. [1] ; Perujo, Sergio D. [1] ; Bastos, Andrea C. [1] ; Garcia, Edemir F. [1] ; Ferreira, Tamires T. [1] ; Fraceto, Leonardo F. [2] ; Rosa, Andre H. [2]
Total Authors: 10
Affiliation:
[1] Unesp Univ Estadual Paulista, Dept Fis & Quim, BR-15385000 Ilha Solteira, SP - Brazil
[2] UNESP Univ Estadual Paulista, Dept Engn Ambiental, BR-18087180 Sorocaba, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF HAZARDOUS MATERIALS; v. 237, p. 215-222, OCT 30 2012.
Web of Science Citations: 20
Abstract

In this work, a new modified oligosilsesquioxane was prepared, characterized and evaluated for its heavy metal adsorption characteristics from aqueous solution. The material was characterized using infrared spectroscopy, X-ray diffractometry, solid-state Si-29 and C-13 nuclear magnetic resonance. Batch and column experiments were conducted to investigate for Fe (III), Cr (III), Cu (II), Cd (II), Pb (II) and Ni (II) removal from dilute aqueous solution by sorption onto modified oligosilsesquioxane. The results obtained in the flow experiments, showed a recovery of ca. 100% of the metal ions adsorbed in a column packed with 2.0 g of nanomaterial, using 3 mL of 1.0 mol L-1 HCl solution as eluent. The detection limits for Fe, Cr, Cu, Cd, Pb, and Ni were 0.26, 0.33, 0.38, 0.41, 0.47 and 0.55 mu g L-1, respectively. The relative standard deviation values (n = 12) were <4.82% for Fe, <4.12% for Cr, <3.79% for Cu, <3.03% for Cd, <4.02% for Pb and <2.65% for Ni. The proposed method was successfully applied to the analysis of environmental samples. (C) 2012 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 11/18086-3 - Synthesis and characterization of inorganic-organic hybrid based on silicon: study of application as adsorbents, heterogeneous catalysts and modifiers for epoxy resins
Grantee:Newton Luiz Dias Filho
Support Opportunities: Regular Research Grants