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

Autor(es)

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]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF HAZARDOUS MATERIALS; v. 237, p. 215-222, OCT 30 2012.
• Citações Web of Science: 20

Resumo

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)

• Processo FAPESP: 11/18086-3 - Síntese e caracterização de híbridos inorgânico-orgânicos à base de silício: estudo de aplicação como adsorventes, catalisadores heterogêneos e modificadores de resinas epoxídicas
• Beneficiário: Newton Luiz Dias Filho
• Modalidade de apoio: Auxílio à Pesquisa - Regular