標題: Adsorption characteristics of iron-cyanide complex on gamma-Al2O3
作者: Cheng, WP
Huang, CP
環境工程研究所
Institute of Environmental Engineering
關鍵字: Langmuir model;triple-layer model;ferrocyanide;ferricyanide
公開日期: 10-八月-1996
摘要: The adsorption behavior of ferrocyanide and ferricyanide toward aluminum oxide with a 0.01 M NaClO4 background electrolyte at 25 degrees C was investigated. Results obtained from different pH values demonstrated that the adsorption of these complex ions could be described by a modified Langmuir isotherm in the concentration range 0.5 X 10(-4) to 4 X 10(-4) M. This modified Langmuir isotherm developed here could accurately predict the equilibrium partition between solid and liquid phases while taking proton competition into account. Also, the apparent equilibrium constant (K-app) derived from the Langmuir equation for ferrocyanide or ferricyanide adsorption on aluminum oxide was compared with the intrinsic constant (K-int) calculated by triple-layer model simulation. This comparison revealed a strong correlation between the apparent equilibrium constant and the intrinsic constant. Moreover, in comparing K-app with K-int, we can infer that the adsorption of either ferrocyanide or ferricyanide complexes onto aluminum oxide is achieved through outer-sphere complexation. (C) 1996 Academic Press, Inc.
URI: http://dx.doi.org/10.1006/jcis.1996.0420
http://hdl.handle.net/11536/1112
ISSN: 0021-9797
DOI: 10.1006/jcis.1996.0420
期刊: JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume: 181
Issue: 2
起始頁: 627
結束頁: 634
顯示於類別:期刊論文


文件中的檔案:

  1. A1996UZ53600030.pdf