| Texto completo | |
| Autor(es): |
Pereira, Milene S.
[1]
;
Martins, Amanda E.
[1]
;
Jorgetto, Alexandre O.
[1]
;
Santos, Felipe A.
[1]
;
Silva, Rafael I. V.
[1]
;
Saeki, Margarida J.
[1]
;
Martines, Marco A. U.
[2]
;
Jorge, Sonia M. A.
[1]
;
Castro, Gustavo R.
[1]
Número total de Autores: 9
|
| Afiliação do(s) autor(es): | [1] IB UNESP, Dept Quim & Bioquim, CP 510, BR-18618000 Botucatu, SP - Brazil
[2] Univ Fed Mato Grosso do Sul, Dept Quim, BR-79074460 Campo Grande, MS - Brazil
Número total de Afiliações: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | ENVIRONMENTAL ENGINEERING AND MANAGEMENT JOURNAL; v. 17, n. 1, p. 165-173, JAN 2018. |
| Citações Web of Science: | 0 |
| Resumo | |
This paper describes the preparation and use of a low cost biosorbent made of castor leaves for the extraction of Cu(II) from an aqueous medium. The biosorbent was characterized by Fourier transform infrared spectroscopy (FTIR), surface area and pore diameter measurements. The results showed absorption bands of carboxylic and amide groups at 1738 and 1540 cm(-1), respectively, and the measured surface area was 1.3728 +/- 0.0160 m(2) g(-1), with predominance of microporous < 10.51 A. Quantitative extraction was achieved at pH above 4 and kinetic equilibrium was reached within 10 minutes. Isotherm adsorption data were adjusted to a modified Langmuir equation, yielding a Ns value of 0.321 mmol g(-1). The continuous flow system showed, after the optimization parameters, a 47-fold enrichment factor (preconcentration factor) when applied to standard and real water samples (Parana River and Tap water). The developed preconcentration method was validated against the certified reference material (CRM 1643e). (AU) | |
| Processo FAPESP: | 12/21795-9 - Incorporação da molécula 4-amino-3-hidrazino-5-mercapto-1,2,4-triazole na superfície de sílica mesoporosa para aplicação na determinação de traços de Cu(II), Cd(II), Ni(II), Pb(II) e CO(II) em amostras de água do Rio Tietê |
| Beneficiário: | Gustavo Rocha de Castro |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 11/14944-5 - Síntese e aplicação de sílica mesoporosa, modificada com o ligante 4-amino-2-mercaptopirimidina, na pré-concentração Cd (II), Cu(II), Pb(II), Zn(II) e Ni(II) em amostras de águas naturais |
| Beneficiário: | Alexandre de Oliveira Jorgetto |
| Modalidade de apoio: | Bolsas no Brasil - Mestrado |