A parallel plate electrochemical reactor model for the destruction of nitrate and nitrite in alkaline waste solutions

Conference · Sun May 01 04:00:00 EDT 1994

OSTI ID:10145891

Hobbs, D. T. ^[1]; Coleman, D. H. ^[2]; White, R. E. ^[2]

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1. Westinghouse Savannah River Co., Aiken, SC (United States)
2. South Carolina Univ., Columbia, SC (United States). Dept. of Chemical Engineering

The nitrate and nitrite species present in liquid radioactive waste solutions must be destroyed before permanent disposal of the waste can be accomplished. This process can simultaneously remove hazardous compounds and reduce the volume of the waste. A divided cell parallel plate electrochemical reactor model with multiple reactions at both electrodes and a recirculation tank was developed a simulate the reduction of nitrate and nitrite in alkaline solutions. Since many gases are produced in the process, a flash calculation is used in the model to predict the off gas composition. The gases are assumed to stay in solution in the reactor and are flashed after passing through the reactor. Predictions of the off gas composition, the liquid free composition, reaction current efficiencies, and other quantities of interest for each species versus time or charge passed will be presented.

• Research Organization: Westinghouse Savannah River Co., Aiken, SC (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC09-89SR18035
• OSTI ID: 10145891
• Report Number(s): WSRC-MS--94-0197; CONF-940529--11; ON: DE94010819
• Country of Publication: United States
• Language: English

Related Subjects

052001
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400
CHEMICAL REACTORS
ELECTROCHEMISTRY
GASEOUS WASTES
LIQUID WASTES
NITRATES
NITRITES
RADIOACTIVE WASTE PROCESSING
REDUCTION
WASTE PROCESSING