Preconcentration and determination of Cu(II) in a fresh water sample using modified silica gel as a solid-phase extraction adsorbent


Autoria(s): Pereira, A. S.; Ferreira, G.; Caetano, L.; Martines, M. A. U.; Padilha, P. M.; Santos, A.; Castro, G. R.
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

20/05/2014

20/05/2014

15/03/2010

Resumo

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Processo FAPESP: 06/54946-9

A method was developed to attach 4-amino-2-mercaptopyrimidine (AMP) onto silica gel surface and to determine trace metals. The Surface functionalization reaction was performed with a silylant agent, chloropropyltrimethoxysilane (Si-CPTS), and the product, Si-AMP, was characterized by FT-IR and elemental analysis to evaluate the Surface modification. The functionalized silica was applied in the sorption of Cu(II) ions from an aqueous medium. The series of adsorption isotherms were adjusted to a modified Langmuir equation and the maximum number of moles of adsorbed copper was 0.447 mmol g(-1). The modified material was placed in a preconcentration system, where it reached ail approximately 20-fold enrichment factor using 5 mg of Si-AMP. The proposed method was applied in the preconcentration and determination of Cu(II) in a fresh water sample from the Parana river and was validated through a comparative analysis of a standard reference material (1643 e). (C) 2009 Elsevier B.V. All rights reserved.

Formato

399-403

Identificador

http://dx.doi.org/10.1016/j.jhazmat.2009.10.018

Journal of Hazardous Materials. Amsterdam: Elsevier B.V., v. 175, n. 1-3, p. 399-403, 2010.

0304-3894

http://hdl.handle.net/11449/10054

10.1016/j.jhazmat.2009.10.018

WOS:000274490400048

Idioma(s)

eng

Publicador

Elsevier B.V.

Relação

Journal of Hazardous Materials

Direitos

closedAccess

Palavras-Chave #Modified silica #Aqueous medium #Copper #Preconcentration
Tipo

info:eu-repo/semantics/article