Kinetics and Thermodynamics Studies of Cobalt (II) Adsorption onto Alumina

被引：2

作者：

Zafar, Uzma ^{[1
]}

Bhatti, Muhammad Arif ^{[1
]}

Akram, Adnan ^{[1
]}

机构：

[1] PCSIR Labs Complex, Mineral Proc Res Ctr, Ferozepur Rd, Lahore 54600, Pakistan

来源：

PAKISTAN JOURNAL OF ANALYTICAL & ENVIRONMENTAL CHEMISTRY | 2018年 / 19卷 / 01期

关键词：

Cobalt; Alumina; Adsorption kinetics; Isotherms; Thermodynamics;

D O I：

10.21743/pjaec/2018.06.05

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Adsorption for alumina-cobalt (II) ions solution system was investigated as a function of adsorbent dose, contact time, temperature, pH of solution and initial concentration of adsorbate. The optimum conditions for removal of cobalt (II) ions were found as pH 7.5-8.5, adsorbent dose of solution 20 gl(-1), equilibrium time 90 minutes and initial concentration range 5-50 mgl(-1). Pseudo-second-order kinetics was observed for adsorption of cobalt while cobalt removal process does not seem to control the intra-particle diffusion. Langmuir, Freundlich and Dubnin-Radushkevich isotherm models were applied to analyze the equilibrium isotherms for adsorption of cobalt (II) ions onto alumina. The experimental results indicated that equilibrium data follows the Langmuir model within used concentration range.

引用

页码：53 / 63

页数：11

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