Adsorção de arsênio(V) pelo compósito magnético hidrotalcita: óxido de ferro

Química Nova

Thiago Vinícius Toledo¹  Carlos Roberto Bellato¹  Rafael Henrique Do Rosário¹  José De Oliveira Marques Neto¹ 

[1] ,Universidade Federal de Viçosa Departamento de Química Viçosa MG ,Brasil

关键词: hidrotalcite - iron oxide composite;    arsenate;    adsorption;   

DOI  :  10.1590/S0100-40422011000400002

来源: SciELO

【 摘 要 】

In this work, hydrotalcite, a layered double hydroxide, had its adsorption and ion exchange properties combined with the magnetic properties of iron oxide to produce a magnetic adsorbent, HT-Fe. The removal of As(V) by a HT-Fe adsorbent was evaluated under various conditions. The Kinetic process was well described by a pseudo-second order rate model. The maximum adsorption capacity, calculated with the Langmuir model showed to be dependent on pH, reaching values of 24.09, 10.19 and 7.44 mg g-1, respectively, for pH values of 4.0, 7.0 and 9.0. The inhibition by competition of anions is dependent on the type of ionic species.

【 授权许可】

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