Open AccessEffects of Ammonium Molybdophosphate (AMP) on Strontium, Actinides, and RCRA Metals in SRS Simulated Waste
Author(s) -
M.J. Barnes
Publication year - 2004
Language(s) - English
Resource type - Reports
DOI - 10.2172/823469
Subject(s) - strontium , chemistry , dilution , ammonium , radiochemistry , actinide , nuclear chemistry , isotope dilution , radioactive waste , chromatography , waste management , organic chemistry , mass spectrometry , physics , engineering , thermodynamics
High Level Waste samples contain elevated concentrations of radioactive cesium requiring marked dilution of the waste to facilitate handling in non-shielded facilities. The authors developed a sample treatment protocol, using ammonium molybdophosphate (AMP) to remove sufficient cesium to allow handling of the samples with minimal dilution. The sample treatment protocol includes the following steps: pH adjust the sample to the range of 0.01 to 1.0 M acidity; mix 30 mL of acidified sample with 40-60 mg of AMP; cap and shake the mixture for 30-60 seconds; filter AMP from the liquid using 0.45 PTFE syringe filters; and send filtrate directly forward for analysis. To develop the method, SRTC performed a series of tests with three different salt solutions designed to determine the propensity of ammonium molybdophosphate (AMP) to bind some of the common analytes such as the actinides (Pu, Am, Np, U), strontium, or the metals (Ag, As, Ba, Cd, Cr, Hg, Pb, Se) regulated by the Resource Conservation Recovery Act (RCRA). SRTC also examined relevant literature to summarize reported interactions between AMP and other elements