A5006784159- Radioactive element chemistry and processing
- Radioactive contamination and transfer
- Lanthanide and Transition Metal Complexes
- Geochemistry and Elemental Analysis
- Isotope Analysis in Ecology
- Radioactivity and Radon Measurements
- Chemical Synthesis and Characterization
- Nuclear materials and radiation effects
- Chemical and Physical Properties in Aqueous Solutions
- Inorganic and Organometallic Chemistry
- Nuclear Physics and Applications
- Groundwater flow and contamination studies
- Analytical chemistry methods development
- Water Quality and Resources Studies
- Organometallic Complex Synthesis and Catalysis
Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
2022-2025
Université Paris-Saclay
2022
Centre National de la Recherche Scientifique
2015-2022
Institut National de Physique Nucléaire et de Physique des Particules
2022
Clemson University
2017-2020
Université Côte d'Azur
2015-2016
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2014-2016
CEA Marcoule
2014-2016
Institut de Chimie de Nice
2015-2016
CEA DAM Île-de-France
2015
Seawater contains radionuclides at environmental levels; some are naturally present and others come from anthropogenic nuclear activity. In this report, the molecular speciation in seawater of uranium(VI) neptunium(V) a concentration 5 × 10−5 M has been investigated for first time using combination two spectroscopic techniques: Time-resolved laser-induced fluorescence (TRLIF) U extended X-ray absorption fine structure (EXAFS) Np LIII edge. parallel, theoretical uranium neptunium same is also...
The fate of radionuclides in the environment and especially seawater is a cause great concern for modern society drives need experimental speciation studies.
Understanding the interactions between plutonium and iron (oxy)hydroxide minerals is necessary to gain a predictive understanding of environmental mobility evaluate long-term performance nuclear waste repositories. We investigated fate during formation ferrihydrite its subsequent transformation into goethite. Ferrihydrite was synthesized with varying quantities Pu(IV) following either sorption or coprecipitation process; then aged hydrothermally yield The materials were characterized via...
Abstract This review concerns the speciation of protactinium in aqueous solution under its both oxidation states +IV and +V. Emphasis is placed on experimental data obtained at trace level but also macroscopic amount leading to determination thermodynamic structural data. Thus, complexation Pa(V) with mineral acids organic acids, mainly polyaminocarboxylic (iminodiacetic acid [IDA], nitrilotriacetic [NTA], ethylenediaminetetraacetic [EDTA] diethylenetriaminepentaacetic [DTPA]) are...
In the ocean, complex interactions between natural and anthropogenic radionuclides, seawater, diverse marine biota provide a unique window through which to examine ecosystem trophic transfer mechanisms in cases of accidental dissemination. The nature interaction environment, species is therefore essential for better understanding from hydrosphere biosphere. Although data pertaining rate global are often available, little known regarding mechanism environmental transport uptake heavy...
We use state-of-the-art solid-state and molecular quantum mechanical calculations to predict a longer Pa–O mono-oxo bond than what was reported in the literature.
Due to its radiotoxicity, long half-life, and potentially high environmental mobility, neptunium transport is of paramount importance for risk assessment safety. Environmental through field lysimeters at the Savannah River Site was observed from both oxidized (Np(V)) reduced (Np(IV)) source materials. While sources expected, unexpected spurred further investigation into mechanisms. Partial oxidation resulted in significant release mobile aqueous phase, though a colloidal species appears have...
We investigated the influence of natural organic matter (NOM) on behavior Pu(V) in vadose zone through a combination field lysimeter and laboratory studies. Well-defined solid sources NH4Pu(V)O2CO3(s) were placed two 5-L lysimeters containing NOM-amended soil collected from Savannah River Site (SRS) or unamended exposed to 3 years South Carolina, USA, meteorological conditions. Lysimeter cores removed field, used desorption experiments, characterized using wet chemistry methods X-ray...