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

Title
Arsenic Removal Behavior by Fe-Al Binary Oxide: Thermodynamic and Kinetic Study
Authors
Hye-Jin Hong양중석Bo-Kyong KimJi-Won Yang
Keywords
activation energy; arsenic; Fe-Al binary oxide; kinetic; thermodynamic
Issue Date
2011-11
Publisher
Separation science and technology
Citation
VOL 46, NO 16, 2531-2538
Abstract
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 (ΔH0<0) and occurred spontaneously (ΔG0<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.
URI
http://pubs.kist.re.kr/handle/201004/41137
ISSN
0149-6395
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KIST Publication > Article
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