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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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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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]
Total Authors: 10
[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
Total Affiliations: 3
Document type: Journal article
Source: Journal of Colloid and Interface Science; v. 552, p. 337-350, SEP 15 2018.
Web of Science Citations: 1

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)

FAPESP's process: 17/24465-3 - NMR methods for plant cell wall characterization: development and applications to second generation biofuel technologies
Grantee:Eduardo Ribeiro de Azevedo
Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants