Aluminum Leaching of ''Archived'' Sludge from Tanks 8F, 11H, and 12H

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Aluminum can promote formation or dissolution of networks in hydroxide solid solutions. When present in large amounts it will act as a network former increasing both the viscosity and the surface tension of melts. This translates into poor free flow properties that affect pour rate of glass production in the Defense Waste Processing Facility (DWPF). To mitigate this situation, DWPF operations limit the amount of aluminum contained in sludge. This study investigated the leaching of aluminum compounds from archived sludge samples. The conclusions found boehmite present as the predominant aluminum compound in sludge from two tanks. We did not identify ... continued below

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Fondeur, Fernando F.; Hobbs, D. T. & Fink, S. D. March 12, 2004.

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Aluminum can promote formation or dissolution of networks in hydroxide solid solutions. When present in large amounts it will act as a network former increasing both the viscosity and the surface tension of melts. This translates into poor free flow properties that affect pour rate of glass production in the Defense Waste Processing Facility (DWPF). To mitigate this situation, DWPF operations limit the amount of aluminum contained in sludge. This study investigated the leaching of aluminum compounds from archived sludge samples. The conclusions found boehmite present as the predominant aluminum compound in sludge from two tanks. We did not identify an aluminum compound in sludge from the third tank. We did not detect any amorphous aluminum hydroxide in the samples. The amount of goethite measured 4.2 percentage weight while hematite measured 3.7 percentage weight in Tank 11H sludge. The recommended recipe for removing gibbsite in sludge proved inefficient for digesting boehmite, removing less than 50 per cent of the compound within 48 hours. The recipe did remove boehmite when the test ran for 10 days (i.e., 7 more days than the recommended baseline leaching period). Additions of fluoride and phosphate to Tank 12H archived sludge did not improve the aluminum leaching efficiency of the baseline recipe.

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  • Other Information: PBD: 12 Mar 2004

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  • Report No.: WSRC-TR-2004-00180
  • Grant Number: AC09-96SR18500
  • DOI: 10.2172/828685 | External Link
  • Office of Scientific & Technical Information Report Number: 828685
  • Archival Resource Key: ark:/67531/metadc782154

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  • March 12, 2004

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  • Dec. 3, 2015, 9:30 a.m.

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  • May 4, 2016, 9:21 p.m.

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Fondeur, Fernando F.; Hobbs, D. T. & Fink, S. D. Aluminum Leaching of ''Archived'' Sludge from Tanks 8F, 11H, and 12H, report, March 12, 2004; South Carolina. (digital.library.unt.edu/ark:/67531/metadc782154/: accessed December 13, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.