Batch and column studies of radium, actinium, thorium and protactinium on CL resin in nitric acid, hydrochloric acid and hydrofluoric acid

• Published in: Journal of radioanalytical and nuclear chemistry 2021-04, Vol.328 (1), p.225-233
• Main Authors: Kmak, Kelly N., Shaughnessy, Dawn A., Vujic, Jasmina
• Format: Article
• Language: English
• Subjects: Actinium; Chemistry; Chemistry and Materials Science; CL resin; Diagnostic Radiology; Dilution; Fluorides; Hadrons; Heavy Ions; Hydrochloric acid; Hydrofluoric acid; Hydrogen chloride; Inorganic Chemistry; INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Nitric acid; Nuclear Chemistry; Nuclear Physics; Physical Chemistry; Protactinium; Radium; Resins; Separation; Thorium
• ISSN: 0236-5731; 1588-2780
• DOI: 10.1007/s10967-021-07636-9

CL resin (TrisKem International) was characterized for separations of radium, actinium, thorium and protactinium. Batch studies are presented for radium, actinium and thorium in HCl and HNO 3 as well as for radium, thorium and protactinium in HF. The uptake of thorium from dilute HNO 3 (≤ 10 −4  M) and dilute HCl (≤ 10 −4  M) was found to be very high ( D w  > 100 in HNO 3 and > 1000 in HCl). Kinetics studies on thorium were performed in HCl and HNO 3 to determine suitably for column separations. Six column separation studies are presented including the separation of trace thorium from radium and actinium in dilute HCl and HNO 3 , the separation of radium from 1 mg 232 Th in dilute HCl, the separation of thorium and radium in the presence of HCl and excess Cl − , the separation of radium, protactinium and thorium by retention of protactinium and the separation of protactinium and thorium by retention of thorium.