Adsorption behavior of Cr(VI) on activated hazelnut shell ash and activated bentonite

被引：64

作者：

Bayrak, Y ^{[1
]}

Yesiloglu, Y ^{[1
]}

Gecgel, U ^{[1
]}

机构：

[1] Trakya Univ, Dept Chem, TR-22030 Edirne, Turkey

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2006年 / 91卷 / 1-3期

关键词：

adsorption; bentonite; Freundlich isotherm; hazelnut shell ash;

D O I：

10.1016/j.micromeso.2005.11.010

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The possible use of activated hazelnut shell ash and activated bentonite as the adsorbents of Cr(VI) from synthetic solutions and the effect of operating parameters were investigated. The activated hazelnut shell ash was prepared thermally in two sizes 0.5 and 1.0 mm. The maximum removal of Cr(VI) occurred at pH 3 by activated hazelnut shell ash and at pH 5 by activated bentonite. The amounts of Cr(VI) adsorbed increased with increase in dose of both adsorbents and their contact time. The equilibrium data was analysed using the Langmuir and Freundlich isotherms. The characteristics parameters for each isotherm were determined. The Freundlich adsorption model was applied to describe the equilibrium isotherms and the isotherm constants were determined. The Freundlich model agrees very well with experimental data. (c) 2005 Elsevier Inc. All rights reserved.

引用

页码：107 / 110

页数：4

共 23 条

[1] Effects of geographical origin and variety on vitamin and mineral composition of hazelnut (Corylus avellana L.) varieties cultivated in Turkey [J].