This report describes the results from testing the organic ion exchange resin SuperLig® 644 for separating cesium from radioactive alkaline wastes currently stored at Hanford, Washington. The primary objective of this work was to determine the deterioration in performance of SuperLig® 644 over 25 repeated cycles of waste processing and elution. The resin appeared to lose approximately 60% of its effective capacity for cesium over the course of the 25 cycles. However, ~34% of the resin mass was also lost over this period. The difference of 26% represents a loss in capacity and is presumably due to chemical alteration of the ion exchange sites. In addition, though the weight of resin decreased with each cycle, the same volume of eluant was required to elute the resin in each cycle. Resin oxidation was assumed the major degradation mechanism since oxygen dissolved in the feedstock was consumed upon processing.
Revised: January 17, 2011 |
Published: April 15, 2005
Citation
Arm S.T., D.L. Blanchard, and S.K. Fiskum. 2005.Chemical Degradation of an Ion Exchange Resin Processing Salt Solutions.Separation and Purification Technology 43, no. 1:59-69. PNWD-SA-6222. doi:10.1016/j.seppur.2004.10.001