Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/handle/123456789/9598
Title: Synthesis and application of a new carboxylated cellulose derivative. Part I : removal of Co2+, Cu2+ and Ni2+ from monocomponent spiked aqueous solution.
Authors: Teodoro, Filipe Simões
Ramos, Stela Nhandeyara do Carmo
Elias, Megg Madonyk Cota
Mageste, Aparecida Barbosa
Ferreira, Gabriel Max Dias
Silva, Luis Henrique Mendes da
Gil, Laurent Frédéric
Gurgel, Leandro Vinícius Alves
Keywords: Adsorption
Thermodynamics
Desorption
Isothermal titration calorimetry
Issue Date: 2016
Citation: TEODORO, F. S. et al. Synthesis and application of a new carboxylated cellulose derivative. Part I : removal of Co2+, Cu2+ and Ni2+ from monocomponent spiked aqueous solution. Journal of Colloid and Interface Science, v. 483, p. 185-200, 2016. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0021979716305537>. Acesso em: 15 set. 2017.
Abstract: A new carboxylated cellulose derivative (CTA) was prepared from the esterification of cellulose with 1,2, 4-Benzenetricarboxylic anhydride. CTA was characterized by percent weight gain (pwg), amount of carboxylic acid groups (nCOOH), elemental analysis, FTIR, TGA, solid-state 13C NMR, X-ray diffraction (DRX), specific surface area, pore size distribution, SEM and EDX. The best CTA synthesis condition yielded a pwg and nCOOH of 94.5% and 6.81 mmol g 1, respectively. CTA was used as an adsorbent material to remove Co2+, Cu2+ and Ni2+ from monocomponent spiked aqueous solution. Adsorption studies were developed as a function of the solution pH, contact time and initial adsorbate concentration. Langmuir model better fitted the experimental adsorption data and the maximum adsorption capacities estimated by this model were 0.749, 1.487 and 1.001 mmol g 1 for Co2+, Cu2+ and Ni2+, respectively. The adsorption mechanism was investigated by using isothermal titration calorimetry. The values of DadsH were in the range from 5.36 to 8.09 kJ mol 1, suggesting that the mechanism controlling the phenomenon is physisorption. Desorption and re-adsorption studies were also performed. Desorption and re-adsorption efficiencies were closer to 100%, allowing the recovery of both metal ions and CTA adsorbent.
URI: http://www.repositorio.ufop.br/handle/123456789/9598
ISSN: 00219797
metadata.dc.rights.license: O periódico Journal of Colloid and Interface Science concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 4210810074346.
Appears in Collections:DEQUI - Artigos publicados em periódicos

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