Plutonium sorption onto hematite colloids at femto- and nanomolar concentrations
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Anna Yu. Romanchuk
Abstract
The surface-mediated reduction of Pu(VI) upon sorption onto hematite colloids is addressed in the paper that bring some new light on the mechanisms of interaction of Pu in high valence states with different Fe(III) oxides. We study the sorption of Pu taken at two different total concentrations around 10−9 and 10−14 M using 239Pu and short-lived 237Pu tracer. In order to conclude on the mechanisms of Pu sorption onto hematite, the kinetics of sorption of Pu(IV) and Pu(VI) at two concenrations is studied as well as its leching behavior. The rate limiting step in Pu(VI) sorption is its surface-mediated reduction. The experimental evidence of the polymerization of Pu(IV) on the surface taken at Pu total concentration of ∼10−9 M is presented based on the kinetics of sorption and leaching behavior.
© by Oldenbourg Wissenschaftsverlag, Moscow 119992, Germany
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Artikel in diesem Heft
- Small scale production of high purity 193mPt by the 192Os(α,ߙ3n)-process
- Plutonium sorption onto hematite colloids at femto- and nanomolar concentrations
- Determination of 235U/238U ratio by low energy gamma rays: an experimental evaluation
- Chromatographic generator systems for the actinides and natural decay series elements
- Metal ion selectivities of the highly preorganized tetradentate ligand 1,10-phenanthroline-2,9-dicarboxamide with lanthanide(III) ions and some actinide ions
- Humic substances extraction, characterization and interaction with U(VI) at Ruprechtov site (CZ)
- Studies on the third-phase formation in DHDECMP/dodecane/HNO3
- Comparative performance of semi-absolute k0-instrumental neutron activation analysis and Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES) for compositional decoding of aluminum base alloys
- The thermal release of scandium from titanium metal – a simple way to produce pure 44Sc for PET application
