Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/handle/123456789/9961
Title: Modeling adsorption of copper(II), cobalt(II) and nickel(II) metal ions from aqueous solution onto a new carboxylated sugarcane bagasse. Part II : Optimization of monocomponent fixed-bed column adsorption.
Authors: Xavier, Amália Luísa Pedrosa
Herrera Adarme, Oscar Fernando
Furtado, Laís Milagres
Ferreira, Gabriel Max Dias
Silva, Luis Henrique Mendes da
Gil, Laurent Frédéric
Gurgel, Leandro Vinícius Alves
Keywords: Fixed-bed adsorption
Modeling
Metal ion
Design of experiments
Issue Date: 2018
Citation: XAVIER, A. L. P. et al. Modeling adsorption of copper(II), cobalt(II) and nickel(II) metal ions from aqueous solution onto a new carboxylated sugarcane bagasse. Part II : Optimization of monocomponent fixed-bed column adsorption. Journal of Colloid and Interface Science, v. 516, p. 431-445, 2018. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0021979718300833?via%3Dihub>. Acesso em: 05 abr. 2018.
Abstract: In the second part of this series of studies, the monocomponent adsorption of Cu2+, Co2+ and Ni2+ onto STA adsorbent in a fixed-bed column was investigated and optimized using a 22 central composite design. The process variables studied were: initial metal ion concentration and spatial time, and the optimized responses were: adsorption capacity of the bed (Qmax), efficiency of the adsorption process (EAP), and effective use of the bed (H). The higher Qmax for Cu2+, Co2+ and Ni2+ were 1.060, 0.800 and 1.029 mmol/g, respectively. The breakthrough curves were modeled by the original Thomas and Bohart- Adams models. The changes in enthalpy (DadsH ) of adsorption of the metal ions onto STA were determined by isothermal titration calorimetry (ITC). The values of DadsH were in the range of 3.0–6.8 kJ/mol, suggesting that the adsorption process involved physisorption. Desorption (Edes) and readsorption (Ere-ads) of metal ions from the STA adsorbent were also investigated in batch mode, and the optimum conditions were applied for three cycles of adsorption/desorption in a fixed bed column. For these cycles, the lowest values of Edes and Ere-ads were 95 and 92.3%, respectively, showing that STA is a promising candidate for real applications on a large scale.
URI: http://www.repositorio.ufop.br/handle/123456789/9961
metadata.dc.identifier.uri2: https://www.sciencedirect.com/science/article/pii/S0021979718300833?via%3Dihub
ISSN: 00219797
Appears in Collections:DEQUI - Artigos publicados em periódicos

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