GEOC 102 |
| Abinash Agrawal1, Krishna Pallavi1, and Mark N. Goltz2. (1) Department of Geological Sciences, Wright State University, 261 Brehm Lab, 3640 Colonel Glenn Highway, Dayton, OH 45435, (2) Department of Systems and Engineering Management, Air Force Institute of Technology, 2950 P Street, Bldg 640, AFIT/ENV, Wright-Patterson Air Force Base, OH 45433-7765 |
| Catalytic reduction of nitrate has been reported in recent years only with bimetallic Pd catalysts (e.g., Pd-Cu, Pd-Sn, Pd-In, etc.) for its potential application in the treatment of drinking water impacted with nitrate above the regulated level. In this investigation, nitrate and nitrite reduction is demonstrated with monometallic Pd catalyst and formic acid as a reductant in a bench-scale flow through column reactor. The kinetics of nitrate and nitrite reduction shows zero-order to first-order transition (Michaelis-Menton type kinetics) with decreasing substrate concentrations. The application of formic acid as a reductant minimizes catalyst deactivation and manifests a higher activity for nitrate removal due to an in situ buffering effect. Further, formic acid may be a superior reductant in terms of percent nitrate/nitrite removal and operational safety in field conditions. |
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Poster Session
6:00 PM-9:00 PM, Tuesday, March 30, 2004 Anaheim Convention Center -- Hall A, Poster
Division of Geochemistry |