Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Electro-Oxidation of Ammonia in Sewage to Nitrogen.
Author Marinci, Ljiljana ; Leit, Frank B. ;
CORP Author Ionics, Inc., Watertown, Mass.
Year Published 1970
Report Number FWPCA-14-12-800; EPA-WQO-17010-EED; 01494,; 17010-EED-07/70
Stock Number PB-204 526
Additional Subjects ( Chemical removal(Sewage treatment) ; Ammonia) ; ( Sewage treatment ; Chemical removal(Sewage treatment)) ; ( Oxidation ; Ammonia) ; Electrochemistry ; Catalysts ; Electrodes ; Nitrogen ; Electrolytic cells ; Fluid flow ; Platinum ;
Library Call Number Additional Info Location Last
NTIS  PB-204 526 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 51p
Laboratory tests were conducted to determine the feasibility of electro-oxidation as a means of removal of ammonia from wastewaters. It was determined that, under conditions of ammonia concentration and pH typical of treatment effluents, the electro-oxidation reaction proceeded stoichiometrically to nitrogen and no other oxidation products. Oxidation occurred in concentrations as low as 2 mg/l of ammonia. Using platinized platinum as an electrode, ammonia decomposition occurred in a narrow potential rnage with high coulombic efficiency, assuming a three-electron exchange per ammonia molecule. Conversion of nitrogen to the elemental form was demonstrated by analysis of the gas from the anode. No detectable quantities of nitrite, nitrate hydrazine, and hydroxylamine were discovered in the gas. Electric power costs were estimated at $.01/1000 gallons, but cost of the platinum electrodes was prohibitive. Experiments with other electrodes were unsuccessful. Unless less expensive electrodes are developed, the process cannot be economically competetive with other methods.