BREAKTHROUGH VOLUMES OF TCO4- ON REILLEX(TM)-HPQ ANION-EXCHANGE RESIN IN A HANFORD DOUBLE SHELL TANK SIMULANT

The breakthrough volumes on Reillex(TM)-HPQ anion exchange resin columns for TcO4- solutions have been determined. The feed solutions were a Hanford Double Shell Tank Slurry (DSS) simulant of ionic strength (mu) of 6.22 M and a TcO4- of 5.00 x 10(-5) M and a 1:3 dilution of the DSS simulant, mu = 2.07 M, with a TcO4- of 1.67 x 10(-5) M. The DSS flow rates {mt simulant/(cross section area of column.min)} through the column varied from 0.19 to 20.5 cm/min. The 1% breakthrough volumes varied from 50.0 to 1.3 bed volumes (BV), respectively. The 1:3 DSS flow rate varied from 0.95 to 11.9 cm/min and had 1% breakthrough volumes ranging from 94 to 20 BV, respectively. At a flow rate of 1.0 cm/min, the breakthrough bed volumes are 10.2 and 95.8 BV for the DSS and 1:3 DSS solutions, respectively. Obviously, there is an advantage in processing the 1:3 dilution of the feed stream.