Record Display for the EPA National Library Catalog

RECORD NUMBER: 310 OF 391

OLS Field Name OLS Field Data
Main Title Reduction of Structural Iron in Ferruginous Smectite by Free Radicals.
Author Gan, H. ; Stucki, J. W. ; Bailey, G. W. ;
CORP Author Environmental Research Lab., Athens, GA. ;Illinois Univ. at Urbana-Champaign. Dept. of Agronomy.
Publisher c1992
Year Published 1992
Report Number EPA/600/J-93/285;
Stock Number PB93-222768
Additional Subjects Environmental effects ; Oxidation reduction reactions ; Clay minerals ; Soil properties ; Land pollution ; Reducing agents ; Free radicals ; Smectite ; Agricultural products ; Industrial plants ; Physicochemical properties ; Electron transfer ; Electron paramagnetic resonance ; Iron ; Reprints ; Structural iron ; Ferruginous smectite ; Chemical reaction mechanisms
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB93-222768 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 11/22/1993
Collation 9p
Abstract
The oxidation state of structural iron greatly influences the physical-chemical properties of clay minerals, a phenomenon that may have significant implications for pollutant fate in the environment, for agricultural productivity, and for industrial uses of clays. Knowledge of redox mechanisms is fundamental to understanding the underlying basis for iron's effects on clays. Past studies revealed that the extent of Fe reduction varied depending on the reducing agent used, but this variation may not have been a simple function of the reduction potential of the reducing agent. The objective of the study was to identify the relationship between the Fe reduction mechanism and the free radical activity in the reducing agent. Several reducing agents and their mixtures with the Na-saturated, 0.5 to 2 micrometers size fraction of ferruginous smectite (SWa-1) were analyzed by electron spin resonance (ESR) spectroscopy to determine the presence of unpaired electrons or free radicals. (Copyright (c) 1992, The Clay Minerals Society.)