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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Synthesis and application of sugarcane bagasse cellulose mixed esters. Part II: Removal of Co2+ and Ni2+ from single spiked aqueous solutions in batch and continuous mode

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Autor(es):
Rezende de Almeida, Francine Tatiane [1] ; Cota Elias, Megg Madonyk [1] ; Pedrosa Xavier, Amalia Luisa [1] ; Dias Ferreira, Gabriel Max [1] ; Silva, Isabela Almeida [2] ; Filgueiras, Jefferson Goncalves [2] ; de Azevedo, Eduardo Ribeiro [2] ; Mendes da Silva, Luis Henrique [3] ; Gil, Laurent Frederic [1] ; Alves Gurgel, Leandro Vinicius [1]
Número total de Autores: 10
Afiliação do(s) autor(es):
[1] Univ Fed Ouro Preto, Inst Ciencias Exatas & Biol, Dept Quim, Grp Fis Quim Organ, Campus Morro do Cruzeiro S-N, BR-35400000 Ouro Preto, MG - Brazil
[2] Univ Sao Paulo, Inst Fis Sao 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
Tipo de documento: Artigo Científico
Fonte: Journal of Colloid and Interface Science; v. 552, p. 337-350, SEP 15 2018.
Citações Web of Science: 1
Resumo

Sugarcane bagasse cellulose succinate trimellitate (SBST) was prepared by a one-pot synthesis method. The synthesis of this novel mixed ester was investigated by a 2(3)-factorial design. The parameters investigated were time, temperature, and succinic anhydride mole fraction (chi(SA)). The responses evaluated were the adsorption capacity (q(co2+) and q(Ni2+)), weight gain (wg), and number of carboxylic acid groups (n(T center dot COOH)). C-1(3) Multiple Cross-Polarization solid-state NMR spectroscopy, H-1 NMR relaxometry, and Fourier-transform infrared spectroscopy were used to elucidate the SBST structure. The best SBST reaction conditions were 100 degrees C, 660 min, and chi(SA) of 0.2, which yielded SBST with a wg of 57.1%, n(T center dot COOH) of 4.48 mmol g (-1), and q(co2+) and q(Ni2+), of 0.900 and 0.963 mmol g(-1), respectively. The maximum adsorption capacities (Q(max)) (pH 5.75, 25 degrees C) estimated by the Redlich-Peterson model for Co2+ and Ni2+ were 1.16 and 1.29 mmol g(-1). The Delta H-ads degrees values for Co2+ and Ni2+ adsorption obtained by isothermal titration calorimetry were 8.03 and 6.94 kJ mol(-1). Regeneration and reuse of SBST were investigated and the best conditions applied for fixedbed column adsorption in five consecutive cycles. SBST was fully desorbed and Q(max) values for Co2+ (0.95 mmol g(-1)) and Ni2+ (1.02 mmol g(-1)) were estimated using the Bohart-Adams model. (C) 2019 Elsevier Inc. All rights reserved. (AU)

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
Beneficiário:Eduardo Ribeiro de Azevedo
Linha de fomento: Auxílio à Pesquisa - Programa BIOEN - Regular