The adsorption of TcO4- on ReillexTM-HPQ anion exchange resin from nitric acid solution

The determination of Kd (defined as ([RTcO4-]/[TcO4-]total)mL/g) for TcO4- and the nitrate form of Reilex trademark. HPQ has been determined in nitric acid solutions between 8.9 and 9.8 x 10-4M at 20 degrees C. Equilibrium is attained between the resin and the TcO4- solutions in 30 min or less. The values of Kd and 8.88, 4.43, and 1.33 M HNO3 are 21.6 ± 2.3, 84.1 ± 4.9, and 280 ± 33 mL/g, respectively. These are the averages of two determinations and the uncertainty is one standard deviation of the two values. The value of Kd between 9.2 and 0.01 M nitric acid can be described by the empirical equation Kd = 568[HNO3]-1.435 mL/g. The value of Kd for Reilex trademark-HPQ at 5.0 M HNO3 is four times that of Dowex trademark-1x8