Solubility of PuO/sub 2/. xH/sub 2/O in alkaline Hanford high-level waste solution

Conference · Mon Dec 31 23:00:00 EST 1984

OSTI ID:5402793

Delegard, C H

The solubility of Pu(IV) hydrous oxide, PuO/sub 2/.xH/sub 2/O, in air-equilibrated, synthetic, Hanford high-level waste (HLW) solutions was determined as a function of NaOH, NaAl(OH)/sub 4/, NaNO/sub 3/, NaNO/sub 2/, and Na/sub 2/CO/sub 3/ concentrations. The solubility was found to increase with the square of the NaOH chemical increasing NaOH activity. Aluminate increased solubility by forming a 1:1 complex with the dissolved plutonium species, while carbonate increased solubility by forming a 1:2 plutonium-carbonate complex. Spectral, electrochemical, and solubility evidence points to the existence of hydroxide-complexed Pu(V) dissolved species.

• Research Organization: Rockwell International Corp., Richland, WA (USA). Rockwell Hanford Operations
• DOE Contract Number: AC06-77RL01030
• OSTI ID: 5402793
• Report Number(s): RHO-RE-SA-75-P; CONF-850417-31; ON: DE86015430
• Country of Publication: United States
• Language: English

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ACTINIDE COMPOUNDS
ALKALI METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM HYDROXIDES
CARBON COMPOUNDS
CARBONATES
CHALCOGENIDES
HIGH-LEVEL RADIOACTIVE WASTES
HYDROGEN COMPOUNDS
HYDROXIDES
MATERIALS
NITRATES
NITRITES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLUTONIUM COMPOUNDS
PLUTONIUM DIOXIDE
PLUTONIUM OXIDES
QUANTITY RATIO
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
SODIUM CARBONATES
SODIUM COMPOUNDS
SODIUM HYDROXIDES
SODIUM NITRATES
SOLUBILITY
TRANSURANIUM COMPOUNDS
WASTES