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Recovery of plutonium from nitric-acid waste streams

J.D. Navratil, L.L. Martella

Abstract

Nitric acid (7M) waste streams at Rocky Flats contain 0.01 to 0.001 g/1 plutonium and new processes are under development to reduce the plutonium levels to 10/sup -5/ g/1. Anion exchange and solvent extraction methods are under evaluation. Several macroreticular and microreticular anion exchange resins were evaluated and Rohm and Hass (IRA-938) gave significant improvement in plutonium capacity and elution over several other resins tested. The solvent extraction process uses dihexyl-N, N-diethylcarbamylmethylene phosphonate extractant. The results of recent tests using a combined anion exchange extraction chromatography process will be described for recovering both plutonium and americum.

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Available abstract

Key concepts: Plutonium, Nitric acid, Chemistry, Extraction (chemistry), Ion exchange, Solvent extraction, Phosphonate, Elution