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Título: | 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. |
Autor(es): | 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 |
Palavras-chave: | Fixed-bed adsorption Modeling Metal ion Design of experiments |
Data do documento: | 2018 |
Referência: | 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. |
Resumo: | 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 |
Link para o artigo: | https://www.sciencedirect.com/science/article/pii/S0021979718300833?via%3Dihub |
ISSN: | 00219797 |
Aparece nas coleções: | DEQUI - Artigos publicados em periódicos |
Arquivos associados a este item:
Arquivo | Descrição | Tamanho | Formato | |
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ARTIGO_ModelingAdsorptionCopper.pdf Restricted Access | 1,32 MB | Adobe PDF | Visualizar/Abrir |
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