Separation of Am3+ and Eu3+ using an extraction chromatographic resin containing bis(2,4,4-trimethylpentyl)dithiophosphinic acid as the stationary phase.
Sorption of Am3+ and Eu3+ onto an extraction chromatographic resin material, prepared by impregnating purified bis(2,4,4-trimethylpentyl)dithiophosphinic acid (commercially available as Cyanex 301) into Chromosorb W, was investigated. Separation factor (S.F. = K(d,Am)/K(d,Eu)) values tend to increase in the presence of complexing agents such as thiocyanate and nitrate. In presence of 1 M NaNO3 in the aqueous phase, a S.F. value of approximately 1000 was obtained. The nature of extracted species was ascertained by carrying out the sorption studies at different aqueous phase pH. A column made from 300 mg of the resin material was used for the separation of Am3+ and Eu3+. A synthetic solution containing 1x10(5) cpm each of Am3+ and Eu3+ when loaded on to the column, >99% Eu was eluted out in 60 mL of 1 M NaNO3 at a pH of 3.2 while Am was eluted out using 5 mL of 1 M HNO3. The performance of the resin material was found to be reasonably good even after three cycles.
Bhattacharyya
A
A
Radiochemistry Division, B.A.R.C., Trombay, Mumbai 400085, India.
Mohapatra
P K
PK
Manchanda
V K
VK
D000576:Americium / Q000302:isolation & purification*; D002853:Chromatography, Liquid / Q000379:methods*; D005063:Europium / Q000302:isolation & purification*; D009943:Organophosphorus Compounds / Q000737:chemistry*; D009946:Organothiophosphorus Compounds
D009943:Organophosphorus Compounds; D009946:Organothiophosphorus Compounds; C513643:bis(2,4,4-trimethylpentyl)dithiophosphinic acid; D005063:Europium; D000576:Americium