DEVELOPMENT AND CHARACTERIZATION OF EXTRACTIVE SCINTILLATING RESINS FOR DETERMINATION OF ULTRA-LOW-LEVEL PLUTONIUM IN AQUATIC SYSTEMS

DEVELOPMENT AND CHARACTERIZATION OF EXTRACTIVE SCINTILLATING RESINS FOR DETERMINATION OF ULTRA-LOW-LEVEL PLUTONIUM IN AQUATIC SYSTEMS

Extractive scintillating resins (ESRs) simplify quantification of radionuclides from aqueous solutions by reducing the number of steps required and by reducing waste. Two formulations of plutonium ESR are being developed and characterized: (1) by attaching scintillating polymer chains to the surface...

Full description

Saved in:
Bibliographic Details
Published in:Health physics (1958) Vol. 115; p. S28
Main Authors: Fullmer, WK, Seliman, A, Husson, SM, Powell, BA, DeVol, TA
Format: Journal Article
Language:English
Published: Baltimore Lippincott Williams & Wilkins Ovid Technologies 01-07-2018
Subjects:
Aquatic environment
Aqueous solutions
Copolymerization
Copolymers
Environmental monitoring
Forensic science
Formulations
Internet
Ligands
Natural waters
pH effects
Plutonium
Polymers
Polyurethane resins
Radiation
Radiation detectors
Radioisotopes
Recognition
Resins
Scintillation counters
Silica
Silicon dioxide
Water resources management
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Extractive scintillating resins (ESRs) simplify quantification of radionuclides from aqueous solutions by reducing the number of steps required and by reducing waste. Two formulations of plutonium ESR are being developed and characterized: (1) by attaching scintillating polymer chains to the surface of a molecular recognition resin and (2) by covalently attaching plutonium-selective ligand to a porous plastic scintillating bead. In the first formulation, plastic scintillating polymer was attached to the surface of Pu-02 Analig, a proprietary silica-based molecular recognition resin developed by IBC Advanced Technologies, for selective aqueous Pu uptake over a broad range of pH. Batch uptake tests indicated high affinity (Kd of 1,780 ml g-1 ) for Pu-242(IV) from a pH 1 solution. This resin subsequently was loaded into a PTFE column, and detection efficiency was quantified with a liquid scintillation counter without the introduction of cocktail. Online measurement with the resin was conducted using a flow-cell radiation detector to quantify the plutonium accumulated on the resin as the sample was loading on the column. The detection efficiencies for the batch and online measurements were 36.4% and 28.5%, demonstrating the radioluminescent properties of this resin. In the second formulation, dibenzoylmethane (DBM), an organic ligand that selectively binds Pu at circumneutral pH, was both impregnated into a resin bead and transformed into a vinyl form and covalently attached within a scintillating resin by suspension copolymerization. These DBM resins were characterized using natural waters. Pu selective ESRs are nuclear forensics tools capable of monitoring water systems for unforeseen releases of plutonium.
ISSN:0017-9078
1538-5159