Use este identificador para citar ou linkar para este item: https://locus.ufv.br//handle/123456789/24029
Tipo: Artigo
Título: Synthesis and application of sugarcane bagasse cellulose mixed esters. Part I: Removal of Co2+ and Ni2+ from single spiked aqueous solutions in batch mode using sugarcane bagasse cellulose succinate phthalate
Autor(es): Silva, Luis Henrique Mendes da
Elias, Megg Madonyk Cota
Ferreira, Gabriel Max Dias
Almeida, Francine Tatiane Rezende de
Rosa, Nathália Cristina Martins
Silva, Isabela Almeida
Filgueiras, Jefferson Gonçalves
Azevedo, Eduardo Ribeiro de
Melo, Tânia Márcia Sacramento
Gil, Laurent Frédéric
Gurgel, Leandro Vinícius Alves
Abstract: 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 (χSA) on the responses weight gain (wg), number of carboxylic acid groups (nT,COOH), and adsorption capacity (q) of Co2+ and Ni2+ were evaluated by a 23 experimental design. The chemical structure of the material was elucidated by Fourier transform infrared, 13C Multiple Cross-Polarization solid-state NMR spectroscopy and 1H NMR relaxometry. The best SBSPh synthesis condition (100 °C, 11 h, χSA of 0.2) yielded a wg of 59.1%, nT,COOH of 3.41 mmol g−1, and values of qCo2+ and qNi2+ 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 °C) estimated by this model were 0.62 and 0.53 mmol g−1 for Co2+ and Ni2+, respectively. The ΔadsH° 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 22 experimental design, which showed that SBSPh adsorbent can be recovered and reused without significant loss of adsorption capacity.
Palavras-chave: Mixed esters
Sugarcane bagasse
13C Multiple Cross-Polarization solid-state NMR
Metal ion
Adsorption
Isothermal titration calorimetry
Editor: Journal of Colloid and Interface Science
Tipo de Acesso: Elsevier B. V.
URI: https://doi.org/10.1016/j.jcis.2018.08.109
http://www.locus.ufv.br/handle/123456789/24029
Data do documento: 1-Jan-2019
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