Multiple Ion Exchange Column Tests for Technetium Removal from Hanford Tank Waste Supernate Page: 5 of 39
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241-AZ-102, 241-AN-107, and 241-AP-101 showed that SuperLig* 639 resin was
effective to remove technetium, as TcO4 from highly alkaline Hanford waste solutions
(4-9). The chemical and radiation stability of resin was found to be excellent (10, 11).
The objective of the present study was to demonstrate the SuperLig 639 ion exchange
resin performance and process steps to treat radioactive waste solution in multiple cycles.
The study was also aimed at producinge cesium and technetium decontaminated solution
for use in LAW glass vitrification experiments.
Hanford Tank Waste Sample
A total of thirty 500-mL glass jars of waste samples from Tank 241-AW-101 was
received from the Hanford site in January and March 2001. The 500-mL grab samples
were obtained from riser 22 of the 241-AW-101 waste tank in July, 2000. The as-
received 241-AW-101 samples were homogenized, and then diluted with de-ionized
water to provide a 4.95 M Na' concentration in the supernatant. After dilution, the bulk
solution was filtered through 0.1-micron sintered metal Mott filter to remove entrained
solids. A total of 15 L of the AW-101 filtrate at 4.95 M Na' was available for multiple
ion exchange column testing. Duplicate aliquots of the bulk solution were analyzed by
gamma energy counting to determine the concentration of 1Cs, and inductively coupled
plasma - atomic emission spectroscopy (ICP-AES) to determine 99Tc (total) and metal
ions. The 99Tc (pertechnetate) was determined by chemical separation/beta counting
method. The nitrate and free hydroxide concentrations in the diluted bulk waste samples
were 1.56 and 1.81 M, respectively. The 99Tc concentration in the solution was 0.066
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Hassan, N.M. Multiple Ion Exchange Column Tests for Technetium Removal from Hanford Tank Waste Supernate, article, February 27, 2004; South Carolina. (digital.library.unt.edu/ark:/67531/metadc786432/m1/5/: accessed August 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.