Co-precipitation and solubility studies of cesium, potassium and sodium tetraphenylborate

摘要

This report contains the results from a study requested by High Level Waste Division on the co-precipitation and solubility of cesium, potassium, and sodium tetraphenylborate. Co-precipitation of cesium (Cs), potassium (K), and sodium (Na) tetraphenylborate (TPB) helps determine the efficiency of reagent usage in the Small Tank Precipitation Process. This process uses NaTPB to remove cesium from waste by means of precipitation. Previous studies by McCabe suggested that if the sodium ion concentration (Na+) increased the rate at which cesium tetraphenylborate (KTPB) in the presence of high (Na+) ((approximately)5M) appears to produce a mixed solid phase composed of NaTPB and KTPB together in the crystal lattice.