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Crown Ethers

Crown Ethers

Crown ethers are cyclic polyethers that contain multiple oxygen atoms, usually arranged in a regular pattern. The first crown ether was synthesized by Charles Pederson while working at DuPont in 1967. For this work, Pedersen was co-awarded the 1987 Nobel Prize in Chemistry. Crown ethers are named using the formula x-crown-y, where x is the total number of atoms in the ring and y is the number of ether oxygen atoms. The term 'crown' refers to the crown-like shape that these ether molecules...

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Related Experiment Video

Updated: Mar 17, 2026

Speciation and Bioavailability Measurements of Environmental Plutonium Using Diffusion in Thin Films

Speciation and Bioavailability Measurements of Environmental Plutonium Using Diffusion in Thin Films

Published on: November 9, 2015

BenzoDODA grafted polymeric resin-Plutonium selective solid sorbent.

R Ruhela¹, S Panja², A K Singh¹

¹Materials Processing Division, Materials Group, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India.

Journal of Hazardous Materials

|July 16, 2016

Summary

This summary is machine-generated.

A novel BenzoDODA grafted polymeric resin effectively separates and recovers plutonium(IV) from nitric acid solutions. This selective sorbent shows promise for managing high-level radioactive waste, demonstrating efficient plutonium extraction.

Keywords:

BenzoDODA SDVB resin Plutonium Selective Separation Sorption

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Area of Science:

Radiochemistry
Materials Science
Nuclear Chemistry

Background:

Effective separation and recovery of plutonium are critical for nuclear waste management.
Development of selective sorbents is essential for isolating specific radionuclides from complex matrices.

Purpose of the Study:

To synthesize and evaluate a new ligand-grafted polymeric resin (BenzoDODA SDVB) for plutonium(IV) separation and recovery.
To investigate the sorption behavior, kinetics, and selectivity of the BenzoDODA SDVB resin for plutonium.

Main Methods:

Covalent attachment of a plutonium-selective ligand (BenzoDODA) onto a styrene divinyl benzene (SDVB) polymer matrix.
Sorption studies of plutonium(IV) in nitric acid media, including concentration effects, kinetics, and isotherm analysis.
Selectivity assessment using representative radionuclides from high-level waste and theoretical calculations of the sorbed complex.

Main Results:

BenzoDODA SDVB resin demonstrated efficient sorption of plutonium(IV), with optimal performance in lower nitric acid concentrations.
Sorption equilibrium was achieved within 60 minutes, following pseudo-second-order kinetics and Langmuir isotherm models, indicating chemisorption.
The resin exhibited high selectivity for plutonium over other representative radionuclides, suggesting its suitability for nuclear waste treatment.

Conclusions:

The synthesized BenzoDODA SDVB resin is a promising solid sorbent for the selective separation and recovery of plutonium(IV).
The theoretical calculations support the formation of a stable Pu(NO3)4·BenzoDODA (1:1) complex with a square antiprism geometry.
This material offers a potential advancement in strategies for managing plutonium-containing radioactive waste.