Estudo da adsorção de brometo de etídeo em resina XAD-7

Química Nova

Mônica Winkler De Oliveira¹  Alexandre W. S. Hilsdorf¹  Astréa F. De Souza Silva¹  André Fernando Oliveira¹ 

[1] ,Universidade de Mogi das Cruzes Núcleo de Ciências Ambientais Mogi das Cruzes SP ,Brasil

关键词: ethidium bromide;    XAD-7 resin;    adsorption isotherm;   

DOI  :  10.1590/S0100-40422009000500010

来源: SciELO

【 摘 要 】

The adsorption of ethidium bromide on XAD-7 resin was studied. The Freundlich model was the most representative isotherm model to describe the sorption behavior. A solid-liquid equilibrium model was proposed to explain the resin mass influence on the sorption. The equilibrium constant value estimated was 2.31. The results showed an ethidium bromide ion-pair physical adsorption, with adsorption enthalpy equals to -19.33 kJ/mol. A pK2 value equals to 4.69 ± 0.01 was estimated by two distinct methods. The results will be applied to the ethidium bromide preconcentration aiming its decomposition.

【 授权许可】

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