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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 |
Aparece nas coleções: | Artigos |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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artigo.pdf Until 2100-12-31 | Texto completo | 1,88 MB | Adobe PDF | Visualizar/Abrir ACESSO RESTRITO |
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