Kinetic study and equilibrium isotherm analysis of cationic dye adsorption onto attapulgite and rectorite

被引：1
|
作者：
Song Jingyan [1 ]
Yang Jing [1 ]
机构：
[1] Sichuan Univ Sci & Engn, Inst Architecture & Engn, Zigong 643000, Sichuan, Peoples R China
来源：
TRENDS IN CIVIL ENGINEERING, PTS 1-4 | 2012年 / 446-449卷
关键词：
Low cost adsorbent; Attapulgite; Rectorite; Methylene blue; Kinetic model; Isotherms;
D O I：
10.4028/www.scientific.net/AMR.446-449.2960
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The adsorption properties of the attapulgite and the rectorite were investigated by removal of a cationic dye, methylene blue (MB) from aqueous solution. The attapulgite and the rectorite were characterized by Fourier transform infrared (FT-IR) spectroscopy, Brunauer-Emmett-Teller (BET) and scanning electron microscopy (SEM). The analysis of the isotherm equilibrium data using the Langmuir and Freundlich equations showed that the data fitted better with Langmuir model. Pseudo-first-order and pseudo-second-order models were considered to evaluate the rate parameters. The experimental data were well described by the pseudo-second-order kinetic model. The results indicate that the attapulgite exhibited higher adsorption capacity for MB than rectorite and could be employed as a low-cost alternative in wastewater treatment for the removal of cationic dyes.
引用
收藏
页码：2960 / 2963
页数：4
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