Adsorption behavior of iron-cyanide onto γ-Al2O3 interface : A coagulation approach

Ferrocyanide and ferricyanide ions have strong coagulation ability in a natural water system due to their high valences. Studies with aluminum oxide turbid waters showed significant differences in coagulation between simple ions (Cl-, SO2-4, Fe(CN)3-6, Fe(CN)4-6) and other species (H2PO-4) that inte...

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Published in:Journal of colloid and interface science 1999-05, Vol.213 (1), p.204-207
Main Authors: WEN PO CHENG, CHIHPIN HUANG, PAN, J. R
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
General and physical chemistry
Solid-liquid interface
Surface physical chemistry
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CHIHPIN HUANG
PAN, J. R
description Ferrocyanide and ferricyanide ions have strong coagulation ability in a natural water system due to their high valences. Studies with aluminum oxide turbid waters showed significant differences in coagulation between simple ions (Cl-, SO2-4, Fe(CN)3-6, Fe(CN)4-6) and other species (H2PO-4) that interact chemically with the oxide surface. The evidence suggested that the adsorption of ferrocyanide and ferricyanide on aluminum oxide surface is an outer-sphere reaction. The linear relationship between the logarithm of the significant coagulation concentration and Schultz-Hardy ratios indicated that the coagulation obeyed the DLVO rule. Therefore, it is concluded that the coagulation of aluminum oxide by ferrocyanide and ferricyanide is essentially caused by compression of the electric double layer rather than by charge neutralization. Copyright 1999 Academic Press.
doi_str_mv 10.1006/jcis.1999.6100
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subjects Chemistry
Exact sciences and technology
General and physical chemistry
Solid-liquid interface
Surface physical chemistry
title Adsorption behavior of iron-cyanide onto γ-Al2O3 interface : A coagulation approach
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