Adsorção de íons cobre(II) pela quitosana usando coluna em sistema sob fluxo hidrodinâmico

Química Nova

Luciana Simionatto Guinesi¹  Amanda Alves Esteves¹  Éder Tadeu Gomes Cavalheiro¹ 

[1] ,Universidade de São Paulo Instituto de Química de São Carlos

关键词: chitosan;    copper;    adsorption;   

DOI  :  10.1590/S0100-40422007000400010

来源: SciELO

【 摘 要 】

The adsorption of Cu(II) ions from aqueous solution by chitosan using a column in a closed hydrodynamic flow system is described. The adsorption capacities as a function of contact time of copper(II) ions and chitosan were determined by varying the ionic strength, temperature and the flow of the metal solution. The Langmuir model reproduced the adsorption isothermal data better than the Freundlich model. The experimental kinetic data correlate properly with the second-order kinetic reaction for the whole set of experimental adsorption conditions. The rate constants exercise great influence on the time taken for equilibrium to be established by complexation or electrostatic interaction between the amino groups of chitosan and the metal.

【 授权许可】

CC BY-NC   
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