Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Electrode Measurement of Redox Potential in Anaerobic Ferric/Ferrous Chloride Systems.
Author Grundl, T. J. ; Macalady., D. L. ;
CORP Author Colorado School of Mines, Golden. Dept. of Chemistry and Geochemistry.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Publisher c1989
Year Published 1989
Report Number EPA-R-813077; EPA/600/J-89/386;
Stock Number PB90-246075
Additional Subjects Anaerobic processes ; Electrode potentials ; Iron chlorides ; Iron ; Oxidation ; Hydrology ; pH ; Geochemistry ; Cations ; Electrochemistry ; Reduction(Chemistry) ; Thermodynamic properties ; Nernst effect ; Experimental design ; Water pollution ; Chemical equilibrium ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB90-246075 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 12/03/1990
Collation 23p
The behavior of two inert redox electrodes (Pt and wax-impregnated graphite) was investigated in anaerobic ferrous and ferric chloride solutions in order to establish if these electrodes respond to the Fe(3+)/Fe(2+) couple in a Nernstian manner. A new method for determining dissolved ferric iron at any point in time was used which permitted the calculation of Eh values that are independent of variations in the solubility of ferric oxyhydroxides. This method is applicable to simple iron solution at pH levels of 4 or less. In solutions of ionic strength greater than 0.005M, both electrodes yielded measured potentials that correspond to the value calculated by the Nernst equation. In solutions of ionic strength less than 0.005M, electrode response became non-Nernstian behavior. (Copyright (c) 1989 Elsevier Science Publishers B.V.)