Evaluation of Peroxone Oxidation Techniques for Removal of Explosives from Cornhusker Army Ammunition Plant Waters
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS
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Peroxone technology is based on the combination of hydrogen peroxide H202 and ozone 03 for the generation of the hydroxyl radical OH, which is a powerful reactive species in water, to further oxidize the organic contaminants. The main objective of this study was to determine the technical feasibility of using peroxone systems for treatment of contaminated groundwaters at the Cornhusker Army Ammunition Plant CAAP. The U.S. Army Engineer Waterways Experiment Station WES selected CAAP for the evaluation of peroxone oxidation technology since this site is included on the National Priorities List and due to the relatively high concentration of explosives, namely octahydro-1,3,5,7-tetranitro-1,3,5-tetrazine HMX, hexahydro-1,3,5-trinitro-1,3,5-triazine RDX, trinitrobenzene TNB, trinitrotoluene TNT, 4-aminco-dinitrotoluene 4A-DNT, 2-amino-dinitrotoluene 2A-DNT, and 2,4-dinitrotoluene DNT present. The peroxone oxidation pilot system used in this study was constructed and assembled by the WES Environmental Restoration Branch and the WES Public Works Division. The unit consisted of four glass columns 6 ft in diameter and 14 ft in height plumbed in series, a holding tank 500 gal for influent water supply, two 3-lb per day ozone generators, a microcomputer for data logging, oxidizer injection systems, and monitors for vapor and aqueous phase concentrations of hydrogen peroxide and ozone. The feasibility of using peroxone treatment for remediation of explosives-contaminated water was evaluated using water from three different wells Wells 22, 66, and a New Well that was constructed during the peroxone evaluations. Several oxidizer mass ratios H2O2O3, modes of hydrogen peroxide injection batch or continuous, and hydraulic residence times were studied.
- Physical Chemistry
- Water Pollution and Control