Adsorption of copper and nickel on Na-bentonite

被引：122
|
作者：
Liu Zhi-rong [1 ]
Zhou Shao-qi [1 ]
机构：
[1] S China Univ Technol, Coll Environm Sci & Technol, Guangzhou 510006, Guangdong, Peoples R China
来源：
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION | 2010年 / 88卷 / 01期
关键词：
Na-bentonite; Copper; Nickel; Adsorption; Isotherm; Kinetics; HEAVY-METALS; SORPTION; REMOVAL; IONS; PH;
D O I：
10.1016/j.psep.2009.09.001
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The removal of copper and nickel from aqueous solution on the Na-bentonite has been studied under static conditions. Experiments were carried out as a function of solution pH, dosage of Na-bentonite, contact time and temperature. The adsorption equilibrium for nickel and copper onto Na-bentonite is reached in 200 min. The adsorption of copper and nickel is pH dependent in the pH range 2-9. The kinetic process of adsorption can be described by the pseudo-second-order kinetic equation excellently and the adsorption isotherm be fitted to the Langmuir model by means of regression analyses very well. The adsorption capacities follow the order of Cu2+ > Ni2+ in single-component systems and competitive adsorption capacities in order decreasing is Cu2+ > Ni2+ in binary-component systems. (C) 2009 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：62 / 66
页数：5
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