Thermodynamics of Pb2+ and Ni2+ adsorption onto natural bentonite from aqueous solutions

被引：399

作者：

Donat, R ^{[1
]}

Akdogan, A ^{[1
]}

Erdem, E ^{[1
]}

Cetisli, H ^{[1
]}

机构：

[1] Pamukkale Univ, Fac Sci & Arts, Dept Chem, TR-20017 Denizli, Turkey

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2005年 / 286卷 / 01期

关键词：

natural bentonite; Pb2+ and Ni2+; sorption isotherm;

D O I：

10.1016/j.jcis.2005.01.045

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Removal of Pb2+ and Ni2+ from aqueous solutions by sorption onto natural bentonite was investigated. Experiments were carried out as a function of particle size, the amount of bentonite, pH, concentration of metals, contact time, and temperature. The adsorption patterns of metal ions onto followed the Langmuir, Freundlich, and Dubinin-Radushkevich isotherms. This included adsorption isotherms of single-metal solutions at 303 K by batch experiments. The thermodynamic parameters (Delta H, Delta S, Delta G) for Pb2+ and Ni2+ sorption onto bentonite were also determined from the temperature dependence. The adsorptions were endothermic reactions. The results suggested that natural bentonite is suitable as a sorbent material for recovery and adsorption of metal ions from aqueous solutions. (c) 2005 Elsevier Inc. All rights reserved.

引用

页码：43 / 52

页数：10

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