Arsenic Removal Behavior by Fe-Al Binary Oxide: Thermodynamic and Kinetic Study

被引：17
|
作者：
Hong, Hye-Jin [1 ]
Yang, Jung-Seok [2 ]
Kim, Bo-Kyong [1 ]
Yang, Ji-Won [1 ]
机构：
[1] Korea Adv Inst Sci & Technol, Dept Chem & Biomol Engn, Taejon 305701, South Korea
[2] KIST Gangneung Inst, Kangnung, South Korea
来源：
SEPARATION SCIENCE AND TECHNOLOGY | 2011年 / 46卷 / 16期
关键词：
activation energy; arsenic; Fe-Al binary oxide; kinetic; thermodynamic; COATED FUNGAL BIOMASS; AQUEOUS-SOLUTIONS; IRON-OXIDE; ACTIVATED CARBON; ALUMINUM-OXIDE; ADSORPTION; WATER; ADSORBENTS; FLUORIDE; EQUILIBRIUM;
D O I：
10.1080/01496395.2011.598205
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
In this study, thermodynamic and kinetic behaviors of As(V) and As(III) adsorption on Fe-Al binary oxide were investigated. Adsorptions of both As(V) and As(III) on Fe-Al binary oxide were exothermic reactions (Delta H-0 < 0) and occurred spontaneously (Delta G(0) < 0). Because of strong electrostatic interaction between the As(V) anion and the positive Fe-Al binary oxide, As(V) was adsorbed rapidly and the adsorption rate was controlled by chemical adsorption. On the other hand, As(III) exists in a nonionic form, because of which it was not adsorbed through strong attractive forces. Therefore, the adsorption rate of As(III) was controlled by a combination of diffusion processes and chemical sorption.
引用
收藏
页码：2531 / 2538
页数：8
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