A Pretreatment Protocol is demonstrated for the quantitative conversion and subsequent in situ spectroscopic analysis of non-pertechnetate [Tc(CO)3]+ in tank 241-AN-102 at the Hanford Site. This conversion technique is based on a test method demonstrated using [Re(CO)3]+ in simulated Hanford tank waste. The Protocol entails adding a real waste sample containing the non-pertechnetate [Tc(CO)3]+ species to a developer solution that facilitates the rapid, quantitative conversion of the non-emissive species to a luminescent species which can then be detected spectroscopically. Three AN-102 samples were tested by the standard addition method: (1) a 5 M Na adjusted sample, (2) a sample depleted 137Cs by resin column ion exchange, (3) and an acid-stripped column eluate. The concentrations of non-pertechnetate [Tc(CO)3]+ in these samples were 7.78 × 10-6 M, 6.53 × 10-7 M, and 2.46 × 10-6 M, respectively.
Revised: August 23, 2019 |
Published: July 17, 2018
Citation
Branch S.D., A.D. French, A.M. Lines, C.Z. Soderquist, B.M. Rapko, W.R. Heineman, and S.A. Bryan. 2018.In situ spectroscopic analysis and quantification of [Tc(CO)3]+ in Hanford tank waste.Environmental Science & Technology 52, no. 14:7796-7804.PNNL-SA-129388.doi:10.1021/acs.est.7b05840