Selective Recovery of Chromium from Precipitates Containing d Elements and Actinides: I. Effects of O2

Journal Article · Mon Jul 15 00:00:00 EDT 2002 · Radiokhimiya, 44(4):318-324

OSTI ID:946020

Fedoseev, A M; Budantseva, N A; Yusov, A B; Shilov, V P; Delegard, Calvin H

The oxidation of Cr(III) hydroxides, mixed Fe(III)-Cr(III) hydroxides, and specimens of spinel phases NiCr2O4 and Fe(Cr,Fe)2O4 have been investigated in alkaline suspensions under the action of air and pure oxygen (1-3 atm). The rate of reaction increases with increasing alkali concentration, temperature, and oxygen pressure. Pu(IV) fixed on chromium hydroxides is not oxidized by oxygen under these conditions but is retained in the precipitate.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 946020
• Report Number(s): PNNL-SA-37147; RADKAU; 820201000; TRN: US0901002
• Journal Information: Radiokhimiya, 44(4):318-324, Vol. 44, Issue 4; ISSN 0033-8311
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
ACTINIDES
CHROMIUM
CHROMIUM HYDROXIDES
MATERIALS RECOVERY
OXIDATION
OXYGEN
CHROMATES
PH VALUE
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
PLUTONIUM