Interaction of Cr(VI) with amorphous iron oxide: Adsorption density and surface charge
Journal
Water Science and Technology
Journal Volume
26
Journal Issue
1-2
Pages
181-188
Date Issued
1992
Author(s)
URI
Abstract
Cr(VI) adsorption on amorphous iron oxide was performed in a batch type reactor under constant temperature (25°C) and nitrogen atmosphere. The adsorption percentage of Cr(VI) on iron oxide increases with decreasing pH and total concentration of Cr(VI). But the Cr(VI) adsorption density and surface charges on iron oxide increase as pH is lowered and Cr(VI) concentration increases. From the correlation among Cr(VI) adsorption density, surface charges and changes in system pH, it was suggested that ligand exchange can be used to describe the reaction between soluble Cr(VI) and iron oxide surface.Cr(VI) adsorption on amorphous iron oxide was performed in a batch type reactor under constant temperature (25°C) and nitrogen atmosphere. The adsorption percentage of Cr(VI) on iron oxide increases with decreasing pH and total concentration of Cr(VI). But the Cr(VI) adsorption density and surface charges on iron oxide increase as pH is lowered and Cr(VI) concentration increases. From the correlation among Cr(VI) adsorption density, surface charges and changes in system pH, it was suggested that ligand exchange can be used to describe the reaction between soluble Cr(VI) and iron oxide surface.
Other Subjects
Adsorption; Amorphous materials; Chemical reactions; Correlation methods; Density (specific gravity); Iron oxides; Mathematical models; pH effects; Soil pollution; Water pollution; Adsorption density; Ligand exchange; Surface charge; Chromium; chromium; iron oxide; nitrogen; adsorption; chemical reaction; conference paper; environmental temperature; pH; surface charge; Adsorption; Chromium; Iron Oxides; Waste Water
Type
conference paper