Plutonium sorption and precipitation in the presence of goethite at 25 and 80 ○C
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Mavrik Zavarin
,
Pihong Zhao
Abstract
We have examined the sorption of aqueous Pu(IV) and intrinsic Pu colloids to goethite across a Pu concentration range that spans the solubility of Pu(IV) hydrous oxide, at 25 and 80 ℃, and after equilibration for over 100 days. The strong affinity of aqueous Pu(IV) for the goethite surface is explained by the epitaxial growth of bcc Pu4O7 nano-particles on goethite. The 3–5 nm Pu4O7 nano-particles are strictly associated with goethite, widely dispersed across the goethite surface, and stable over the timescale of months at both 25 and 80 ℃. There is no indication that the sorbed Pu4O7 nano-particles alter to PuO2 over time. Intrinsic Pu colloids were identified by TEM as 3–5 nm PuO2 nano-particles. They exhibit a weaker association with the goethite surface. Aggregation of PuO2 nano-particles was observed. There is no indication that the PuO2 nano-particles, once formed, will alter to Pu4O7 on goethite. Based on supernatant Pu concentrations, PuO2 nano-particle aggregation behavior is consistent with Pu(IV) hydrous oxide precipitation.
©2014 Walter de Gruyter Berlin/Boston
Articles in the same Issue
- Frontmatter
- editorial
- In Memoriam
- X-ray absorption spectroscopy investigations on radioactive matter using MARS beamline at SOLEIL synchrotron
- HPLC Method for Determination of Th, U and Pu in Irradiated (Th,Pu)O2 using Mandelic Acid as an Eluent
- Plutonium sorption and precipitation in the presence of goethite at 25 and 80 ○C
- An attempt to select thermodynamic data and to evaluate the solubility of radioelements with uncertainty under HLW disposal conditions
- Insights into the extraction behavior of U(VI) in Aliquat-336 based ionic liquids
- Simultaneous solid phase extraction of cobalt, strontium and cesium from liquid radioactive waste using microcrystalline naphthalene
- Production and use of 13N labeled N2O5 to determine gas–aerosol interaction kinetics
- Development of [62Zn/62Cu]-DOTA-rituximab as a possible novel in vivo PET generator for anti-CD20 antigen imaging
- Selective mono-radioiodination and characterization of a Cell-Penetrating Peptide: L-Tyr-Maurocalcine
Articles in the same Issue
- Frontmatter
- editorial
- In Memoriam
- X-ray absorption spectroscopy investigations on radioactive matter using MARS beamline at SOLEIL synchrotron
- HPLC Method for Determination of Th, U and Pu in Irradiated (Th,Pu)O2 using Mandelic Acid as an Eluent
- Plutonium sorption and precipitation in the presence of goethite at 25 and 80 ○C
- An attempt to select thermodynamic data and to evaluate the solubility of radioelements with uncertainty under HLW disposal conditions
- Insights into the extraction behavior of U(VI) in Aliquat-336 based ionic liquids
- Simultaneous solid phase extraction of cobalt, strontium and cesium from liquid radioactive waste using microcrystalline naphthalene
- Production and use of 13N labeled N2O5 to determine gas–aerosol interaction kinetics
- Development of [62Zn/62Cu]-DOTA-rituximab as a possible novel in vivo PET generator for anti-CD20 antigen imaging
- Selective mono-radioiodination and characterization of a Cell-Penetrating Peptide: L-Tyr-Maurocalcine
