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Autor(es):
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Cota Elias, Megg Madonyk
[1]
;
Dias Ferreira, Gabriel Max
[1]
;
Rezende de Almeida, Francine Tatiane
[1]
;
Martins Rosa, Nathalia Cristina
[1]
;
Silva, Isabela Almeida
[2]
;
Filgueiras, Jefferson Goncalves
[2]
;
de Azevedo, Eduardo Ribeiro
[2]
;
Mendes da Silva, Luis Henrique
[3]
;
Sacramento Melo, Tania Marcia
[1]
;
Gil, Laurent Frederic
[1]
;
Alves Gurgel, Leandro Vinicius
[1]
Número total de Autores: 11
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| Afiliação do(s) autor(es): | [1] Univ Fed Ouro Preto, Inst Ciencias Exatas & Biol, Dept Quim, Grp Fisicoquim Organ, Campus Morro do Cruzeiro S-N, BR-35400000 Ouro Preto, MG - Brazil
[2] Univ Sao Paulo, Inst Fis Scio Carlos, Dept Fis & Ciencia Interdisciplinar, Av Trabalhador Sao Carlense 400, BR-13566590 Sao Carlos, SP - Brazil
[3] Univ Fed Vicosa, Ctr Ciencias Exatas & Tecnol, Dept Quim, Grp Quim Verde Coloidal & Macromol, Av PH Rolfs S-N, BR-36570000 Vicosa, MG - Brazil
Número total de Afiliações: 3
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| Tipo de documento: |
Artigo Científico
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| Fonte: |
Journal of Colloid and Interface Science;
v. 533,
p. 678-691,
JAN 1 2019.
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| Citações Web of Science: |
3
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| Resumo |
Sugarcane bagasse cellulose mixed ester succinate phthalate (SBSPh) was synthesized by a novel one-pot reaction method. The effects of temperature, time and mole fraction of succinic anhydride (chi(SA)) on the responses weight gain (wg), number of carboxylic acid groups (n(T,COOH)), and adsorption capacity (q) of Co2+ and Ni2+ were evaluated by a 2(3) experimental design. The chemical structure of the material was elucidated by Fourier transform infrared, C-13 Multiple Cross-Polarization solid-state NMR spectroscopy and H-1 NMR relaxometry. The best SBSPh synthesis condition (100 degrees C, 11 h, chi(SA) of 0.2) yielded a wg of 59.1%, n(T,COOH) of 3.41 mmol g(-1), and values of q(co)(2+) and q(Ni)(2+) of 0.348 and 0.346 mmol g(-1), respectively. The Sips model fitted better the equilibrium data, and the maximum adsorption capacities (pH 5.75 and 25 degrees C) estimated by this model were 0.62 and 0.53 mmol g(-1) for Co2+ and Ni2+, respectively. The Delta H-adS degrees values estimated by isothermal titration calorimetry were 8.43 and 7.79 kJ mol(-1) for Co2+ and Ni2+, respectively. Desorption and re adsorption efficiencies were evaluated by a 2(2) experimental design, which showed that SBSPh adsorbent can be recovered and reused without significant loss of adsorption capacity. (C) 2018 Elsevier Inc. All rights reserved. (AU) |
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| Processo FAPESP: |
17/24465-3 - Métodos de RMN para caracterização de paredes celulares de plantas: desenvolvimento e aplicações para tecnologias de biocombustíveis de segunda geração
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| Beneficiário: | Eduardo Ribeiro de Azevedo |
| Linha de fomento: |
Auxílio à Pesquisa - Programa BIOEN - Regular
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