Barton, RG
1994
Interactions of Toxic and Radioactive Metals During Thermal Treatment of Mixed Wastes
Barton, R.G.; Lighty, J.S. and Hillary, J.M.
Proceedings of the 13th International Incineration Conference, Houston, TX, May 1994.
The Idaho National Engineering Laboratory has many wastes that are candidates for thermal treatment. Some of these wastes are soils contaminated with toxic and radioactive metals. The objective of this effort was to learn more about the behavior of the metals present in wastes during thermal treatment processes. All tests were conducted using a bench-scale rotary reactor system. The system minimizes the impact of external mass and heat transfer processes and allows the study of processes intrinsic to the waste. Thus, the data generated are not specific to any single treatment device and can be easily scaled. Three groups of metals can be identified based on the behavior observed in this test program: Group 1 Lead, cadmium, and cesium; Group 2 Gadolinium, samarium, neodymium, and cerium; and Group 3 Zinc.
Group 1 metals vaporize slightly at 925ºC when no chlorine is present. Vaporization increases dramatically in the presence of chlorine. Group 2 metals also appear to vaporize slightly at 925ºC. However, their behavior did not change with the addition of chlorine. The Group 3 metal was not affected by any of the test conditions.
Barton, RG
1994
Interactions of Toxic and Radioactive Metals During Thermal Treatment of Mixed Wastes
Barton, R.G.; Lighty, J.S. and Hillary, J.M.
Proceedings of the 13th International Incineration Conference, Houston, TX, May 1994.
The Idaho National Engineering Laboratory has many wastes that are candidates for thermal treatment. Some of these wastes are soils contaminated with toxic and radioactive metals. The objective of this effort was to learn more about the behavior of the metals present in wastes during thermal treatment processes. All tests were conducted using a bench-scale rotary reactor system. The system minimizes the impact of external mass and heat transfer processes and allows the study of processes intrinsic to the waste. Thus, the data generated are not specific to any single treatment device and can be easily scaled. Three groups of metals can be identified based on the behavior observed in this test program: Group 1 Lead, cadmium, and cesium; Group 2 Gadolinium, samarium, neodymium, and cerium; and Group 3 Zinc.
Group 1 metals vaporize slightly at 925ºC when no chlorine is present. Vaporization increases dramatically in the presence of chlorine. Group 2 metals also appear to vaporize slightly at 925ºC. However, their behavior did not change with the addition of chlorine. The Group 3 metal was not affected by any of the test conditions.