Nitric-phosphoric acid oxidation of organic waste materials

Conference · Wed Nov 01 04:00:00 EST 1995

OSTI ID:123602

Pierce, R A; Smith, J R

A wet chemical oxidation technology has been developed to address issues facing defense-related facilities, private industry, and small-volume generators such as university and medical laboratories. Initially tested to destroy and decontaminate a heterogenous mixture of radioactive-contaminated solid waste, the technology can also remediate other hazardous waste forms. The process, unique to Savannah River, offers a valuable alternative to incineration and other high-temperature or high-pressure oxidation processes. The process uses nitric acid in phosphoric acid; phosphoric acid allows nitric acid to be retained in solution well above its normal boiling point. The reaction converts organics to carbon dioxide and water, and generates NO{sub x} vapors which can be recycled using air and water. Oxidation is complete in one to three hours. In previous studies, many organic compounds were completely oxidized, within experimental error, at atmospheric pressure below 180{degrees}C; more stable compounds were decomposed at 200{degrees}C and 170 kPa. Recent studies have evaluated processing parameters and potential throughputs for three primary compounds: EDTA, polyethylene, and cellulose. The study of polyvinylchloride oxidation is incomplete at this time.

• Research Organization: Westinghouse Savannah River Co., Aiken, SC (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC09-89SR18035
• OSTI ID: 123602
• Report Number(s): WSRC-MS--95-0080; CONF-950877--21; ON: DE96001859
• Country of Publication: United States
• Language: English

Related Subjects

05 NUCLEAR FUELS
40 CHEMISTRY
BENCH-SCALE EXPERIMENTS
DECONTAMINATION
NITRIC ACID
ORGANIC WASTES
OXIDATION
PHOSPHORIC ACID
PLUTONIUM
RADIOACTIVE WASTE PROCESSING
RADIOACTIVE WASTES
SOLID WASTES