Radiolytic stability of some recently developed ion exchange and extraction chromatographic resins containing diphosphonic acid groups

Journal Article · Sat Jan 01 00:00:00 EST 2000 · Solvent Extraction and Ion Exchange

DOI:https://doi.org/10.1080/07366290008934675· OSTI ID:20019011

Chiarizia, R; Horwitz, E P

The effect of {sup 60}Co irradiation on the Diphonix{trademark}, Diphosil and Diphonix-CS chelating ion exchange resins, and on two Dipex{trademark} extraction chromatographic resins containing the P,P{prime}-di(2-ethylhexyl) methanediphosphonic acid (H{sub 2}DEH[MDP]) impregnated in the pores of a polymeric support (Dipex-1) and of silica (Dipex-2), respectively, has been investigated. The resins have been irradiated while in contact with HNO{sub 3} (Diphonix, Diphosil and Dipex resins) or NaOH (Diphonix-DS resin) up to an absorbed dose of about 200 Mrad. As a probe of the resin radiolytic degradation, metal uptake (both equilibrium and kinetics) and capacity measurements have been performed. Results show that the Diphonix-CS resin properties are practically unaffected by irradiation under the experimental conditions used in this work. The Diphonix, Diphosil, and especially the Dipex resins suffer substantial capacity losses, but their affinity for actinide ions is not seriously compromised. On the other hand, the kinetics of metal uptake by the silica based Diphosil and Dipex-2 resins becomes substantially slower indicating that, from a radiolytic degradation standpoint, polymeric materials perform better than silica as supports for H{sub 2}DEH[MDP] containing extraction chromatographic resins.

• Research Organization: Argonne National Lab., IL (US)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 20019011
• Journal Information: Solvent Extraction and Ion Exchange, Vol. 18, Issue 1; Other Information: PBD: Jan 2000; ISSN 0736-6299
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
PHOSPHONIC ACIDS
RADIOLYSIS
ION EXCHANGE MATERIALS
COBALT 60
GAMMA RADIATION
SORPTIVE PROPERTIES
EXTRACTION CHROMATOGRAPHY
COLUMN PACKING
ACTINIDES
SEPARATION PROCESSES