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Título: | 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. |
Autor(es): | Almeida, Francine Tatiane Rezende de Carvalho, Megg Madonyk Cota Elias Xavier, Amália Luísa Pedrosa Ferreira, Gabriel Max Dias Silva, Isabela Almeida Filgueiras, Jefferson Gonçalves Azevedo, Eduardo Ribeiro de Silva, Luís Henrique Mendes da Gil, Laurent Frédéric Gurgel, Leandro Vinícius Alves |
Palavras-chave: | Sugarcane bagasse mixed ester 13C multiple cross-polarization solid-state Nickel Cobalt |
Data do documento: | 2019 |
Referência: | ALMEIDA, F. T. R. et al. 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. Journal of Colloid and Interface Science, v. 552, p. 337-350, set. 2019. Disponível em:<https://www.sciencedirect.com/science/article/pii/S0021979719306022>. Acesso em: 10 fev. 2020. |
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 23-factorial design. The parameters investigated were time, temperature, and succinic anhydride mole fraction (χSA). The responses evaluated were the adsorption capacity (qCo2+ and qNi2+), weight gain (wg), and number of carboxylic acid groups (nT,COOH). 13C Multiple Cross-Polarization solid-state NMR spectroscopy, 1H NMR relaxometry, and Fourier-transform infrared spectroscopy were used to elucidate the SBST structure. The best SBST reaction conditions were 100 °C, 660 min, and χSA of 0.2, which yielded SBST with a wg of 57.1%, nT,COOH of 4.48 mmol g−1, and qCo2+ and qNi2+ of 0.900 and 0.963 mmol g−1, respectively. The maximum adsorption capacities (Qmax) (pH 5.75, 25 °C) estimated by the Redlich-Peterson model for Co2+ and Ni2+ were 1.16 and 1.29 mmol g−1. The ΔadsH° 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 fixed-bed column adsorption in five consecutive cycles. SBST was fully desorbed and Qmax values for Co2+ (0.95 mmol g−1) and Ni2+ (1.02 mmol g−1) were estimated using the Bohart-Adams model. |
URI: | http://www.repositorio.ufop.br/handle/123456789/12328 |
Link para o artigo: | https://www.sciencedirect.com/science/article/pii/S0021979719306022 |
DOI: | https://doi.org/10.1016/j.jcis.2019.05.046 |
ISSN: | 0021-9797 |
Aparece nas coleções: | DEQUI - Artigos publicados em periódicos |
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Arquivo | Descrição | Tamanho | Formato | |
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ARTIGO_SynthesisApplicationSugarcane.pdf Restricted Access | 2,3 MB | Adobe PDF | Visualizar/Abrir |
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