Use este identificador para citar ou linkar para este item: http://www.repositorio.ufop.br/handle/123456789/4855
Título: Adsorption studies of etherdiamine onto modified sugarcane bagasses in aqueous solution.
Autor(es): Gusmão, Karla Aparecida Guimarães
Gurgel, Leandro Vinícius Alves
Melo, Tânia Márcia Sacramento
Carvalho, Cornélio de Freitas
Gil, Laurent Frédéric
Palavras-chave: Adsorption
Etherdiamine Flotigam 2835
Modified sugarcane bagasse
Iron ore flotation
Data do documento: 2014
Referência: GUSMÃO, K. A. G. et al. Adsorption studies of etherdiamine onto modified sugarcane bagasses in aqueous solution. Journal of Environmental Management, v. 133, p. 332-342, 2014. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0301479713007330>. Acesso em: 02 fev. 2015.
Resumo: In this study sugarcane bagasse was modified with succinic anhydride and EDTA dianhydride to obtain SCB 2 and EB adsorbents, respectively. These adsorbents were used to remove etherdiamine, which is used for iron ore flotation from single aqueous solutions. The removal and recovery of etherdiamine is important for environmental and economic reasons due to its toxicity and high cost. The results demonstrated that adsorption of etherdiamine by SCB 2 and EB was better fitted by a pseudo-secondorder kinetic model than pseudo-first-order and Elovich models. Adsorption isotherms were better fitted by the Langmuir model rather than the Freundlich, Sips, and Temkin models. The maximum adsorption capacities (Qmax) of SCB 2 and EB for etherdiamine adsorption were found to be 869.6 and 1203.5 mg/g, respectively. The calculated DG_ values for adsorption of etherdiamine on SCB 2 (_22.70 kJ/ mol) and EB (_19.10 kJ/mol) suggested that chemisorption is the main mechanism by which etherdiamine is removed from the aqueous solution for both adsorbents. The high Qmax values showed that SCB 2 and EB are potential adsorbents for recovering the etherdiamine and treating effluents produced from iron ore flotation.
URI: http://www.repositorio.ufop.br/handle/123456789/4855
DOI: https://doi.org/10.1016/j.jenvman.2013.11.040
ISSN: 0301-4797
Licença: O periódico Journal of Environmental Management concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3577160346985.
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