IEC 156 |
| Christopher J. Bannochie1, Jessi M. Brown2, John T Coates3, Derek C. Denard2, and James D. Navratil4. (1) Savannah River Technology Center, Westinghouse Savannah River Company, Bldg. 773-42A, Aiken, SC 29808, (2) Department of Environmental Engineering and Science, Clemson Universtiy, 342 Computer Court, Anderson, SC 29625-6510, (3) Environmental Engineering and Science, Clemson University, 342 Computer Court, Anderson, SC 29631, (4) Department of Environmental Engineering and Science, Clemson University, Clemson Research Park, 342 Computer Courte, Anderson, SC 29625 |
| Treatment is planned for the high-level nuclear waste stored in tanks at the Department of Energy site in Hanford, Washington. The waste in at least two tanks is an alkaline salt containing organic complexants, high strontium-90 activity, and transuranic species. A precipitation-filtration treatment process is being developed to separate the waste into high and low level streams. Solids forming after the filtration step of the treatment process may interfere with the subsequent ion exchange process. In this work a waste simulant was used to investigate parameters affecting post-filtration solids formation. Parameters were changed in the simulant treatment process and in the filtrate to study the effect of each parameter on post-filtration solids formation. Simulant treatment consisted of changing the amount of added free hydroxide, reaction temperature, reagent concentrations, and filter pore size. Filtrate conditions evaluated included exposure to light, increased filtrate temperature, carbon dioxide treatment, and oxidation potential changes. This poster will review the results of this study. |
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General Poster Session
5:00 PM-7:00 PM, Tuesday, March 25, 2003 Convention Center -- Hall G, Poster
Division of Industrial and Engineering Chemistry |