Adsorption thermodynamic, kinetic and desorption studies of Pb2+ on carbon nanotubes

被引：631

作者：

Li, YH

Di, ZC

Ding, J

Wu, DH

Luan, ZK

Zhu, YQ

机构：

[1] Univ Nottingham, Sch Mech Mat & Mfg Engn, Nottingham NG7 2RD, England

[2] Tsing Hua Univ, Dept Mech Engn, Beijing 100084, Peoples R China

[3] Chinese Acad Sci, State Key Lab Environm Aquat Chem, Res Ctr Eco Environm Sci, Beijing 100085, Peoples R China

来源：

WATER RESEARCH | 2005年 / 39卷 / 04期

关键词：

adsorption; carbon nanotubes; desorption; kinetics; lead; thermodynamics;

D O I：

10.1016/j.watres.2004.11.004

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Adsorption thermodynamics of Pb2+ on carbon nanotubes has been studied at various temperatures of 280, 298 and 321 K and the thermodynamic parameters, such as equilibrium constant (K-0), standard free energy changes (AGO), standard enthalpy change (DeltaH(0)) and standard entropy change (DeltaS(0)), have been obtained. A pseudo- second -order rate model has been employed to describe the kinetic adsorption processes. Desorption studies reveal that Pb2+ can be easily removed from carbon nanotubes by altering the pH values of the solution using both HCl and HNO3, indicating that carbon nanotubes are a promising absorbent for wastewater treatment. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：605 / 609

页数：5

共 20 条

[1] Cadmium removal from aqueous solutions by chitin: kinetic and equilibrium studies [J].