Caroline Simonucci

Institut de Radioprotection et de Sûreté Nucléaire

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Nathalie Van Meir

Institut de Radioprotection et de Sûreté Nucléaire

D. Bugaï

Institute of Geological Sciences

V. Kashparov

National University of Life and Environmental Sciences of Ukraine

Sylvain Bassot

Institut de Radioprotection et de Sûreté Nucléaire

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Éric Viollier

Université Paris Cité

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Édouard Metzger

Laboratoire de Planétologie et Géosciences

Christelle Courbet

Institut de Radioprotection et de Sûreté Nucléaire

A. Martin‐Garin

CEA Cadarache

Didier Jézéquel

Centre Alpin sur les Réseaux Trophiques et Ecosystèmes Lacustre

Corinne Le Gal La Salle

Université de Nîmes

Cooperative Institutions

Centre National de la Recherche Scientifique

140

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

Institut de Radioprotection et de Sûreté Nucléaire

Université Paris Cité

Institut de Recherche pour le Développement

Université Paris-Saclay

Université de Lorraine

CEA Paris-Saclay

Université Paris-Sud

Bureau de Recherches Géologiques et Minières

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Community structure and functional genes in radionuclide contaminated soils in Chernobyl and Fukushima

FEMS Microbiology Letters (2019)

Carolina Hoyos-Hernandez Christelle Courbert Caroline Simonucci Sébastien R. David Timothy M. Vogel

Chernobyl and Fukushima were subjected to radionuclide (RN) contamination that has led to environmental problems. In order to explore the ability of microorganisms to survive in these environments, we used a combined 16S rRNA and metagenomic approach to describe the prokaryotic community structure and metabolic potential over a gradient of RN concentrations (137Cs 1680-0.4 and 90Sr 209.1-1.9 kBq kg-1) in soil samples. The taxonomic results showed that samples with low 137Cs content (37.8-0.4 kBq kg-1) from Fukushima and Chernobyl clustered together. In order to determine the effect of soil chemical parameters such as organic carbon (OC), Cesium-137 (137Cs) and Strontium-90 (90Sr) on the functional potential of microbial communities, multiple predictor model analysis using piecewiseSEM was carried out on Chernobyl soil metagenomes. The model identified 46 genes that were correlated to these parameters of which most have previously been described as mechanisms used by microorganisms under stress conditions. This study provides a baseline taxonomic and metagenomic dataset for Fukushima and Chernobyl, respectively, including physical and chemical characteristics. Our results pave the way for evaluating the possible RN selective pressure that might contribute to shaping microbial community structure and their functions in contaminated soils.

10.1093/femsle/fnz180

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Citations (35)

Millimeter-scale alkalinity measurement in marine sediment using DET probes and colorimetric determination

Water Research (2013)

Édouard Metzger Éric Viollier Caroline Simonucci François Prévot Dewi Langlet

Alkalinity

Absorbance

Bromophenol blue

Triarylmethane dye

10.1016/j.watres.2013.06.038

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Citations (14)

Sedimentary record of redox-sensitive elements (U, Mn, Mo) in a transitory anoxic basin (the Thau lagoon, France)

Marine Chemistry (2005)

Françoise Elbaz-Poulichet J.L. Seidel Didier Jézéquel Édouard Metzger François Prévot

Bioturbation

Authigenic

Sediment–water interface

Sedimentary organic matter

Biogeochemical Cycle

10.1016/j.marchem.2004.10.001

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Citations (53)

Benthic response to shellfish farming in Thau lagoon: Pore water signature

Estuarine Coastal and Shelf Science (2007)

Édouard Metzger Caroline Simonucci Éric Viollier Gérard Sarazin François Prévot

Alkalinity

Dissolved silica

Bioturbation

10.1016/j.ecss.2006.11.011

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Citations (64)

Radiocaesium partitioning in Japanese cedar forests following the “early” phase of Fukushima fallout redistribution

Scientific Reports (2016)

Frédéric Coppin Pierre Hurtevent Nicolas Loffredo Caroline Simonucci Anthony Julien

Abstract Our study focused on radiocaesium ( 137 Cs) partitioning in forests, three vegetation periods after the Fukushima Daiichi nuclear power plant accident. 137 Cs distribution in forest components (organic and mineral soil layers as well as tree compartments: stem, bark, needles, branches and roots) was measured for two Japanese cedar stand ages (17 and 33 years old). The results showed that around 85% of the initial deposit was found in the forest floor and topsoil. For the youngest stand almost 70% of the deposit is present in the forest floor, whereas for the oldest stand 50% is present in the 0–3 cm mineral soil layer. For trees, old and perennial organs (including dead and living needles and branches, litter fall and outer bark) directly exposed to the fallout remained the most contaminated. The crown concentrated 61–69% of the total tree contamination. Surprisingly the dead organs concentrated 25 ± 9% (young cedars) to 36 ± 20% (mature cedar) of the trees’ residual activity, highlighting the importance of that specific compartment in the early post-accident phase for Japanese cedar forests. Although the stem (including bark) represents the highest biomass pool, it only concentrates 3.3% and 4.6% of the initial 137 Cs deposit for mature and young cedars, respectively.

Litter

Fukushima Nuclear Accident

Topsoil

Forest floor

Coarse Woody Debris

Dead Wood

10.1038/srep37618

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Citations (45)

Quantitative assessment of radionuclide migration from near-surface radioactive waste burial sites: the waste dumps in the Chernobyl exclusion zone as an example

Elsevier eBooks (2012)

A. Martin‐Garin Nathalie Van Meir Caroline Simonucci V. Kashparov D. Bugaï

radioactive contamination

10.1533/9780857097194.3.570

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Citations (5)

Better understanding and applications of ammonium 12-molybdophosphate-based diffusive gradient in thin film techniques for measuring Cs in waters

Environmental Science and Pollution Research (2018)

Josselin Gorny Alkiviadis Gourgiotis Frédéric Coppin Laureline Février Hao Zhang

Agarose

10.1007/s11356-018-3719-y

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First determination of iodide in natural water using diffusive gradient in thin-film techniques

HAL (Le Centre pour la Communication Scientifique Directe) (2019)

Josselin Gorny Alkiviadis Gourgiotis Frédéric Coppin Laureline Février Steffen Happel

Measuring the redox speciation of iodine in aquatic environment is a current analytical challenge due to the low concentration of iodine species, sampling and analytical issues linked to the iodine chemistry (redox instability, volatility, etc.). We propose to resolve some of these issues by using the Diffusive Gradient in Thin film (DGT) technique, which is a dynamic passive sampling technique. The DGT sampling allows the preconcentration of the target species leading to the improvement of their determination by chemical analysis. Moreover, the combination of two DGT methods with different selectivities opens up possibilities for redox speciation analysis. The power of this approach to study the behavior of some redox sensitive elements like As, Cr, Hg, has already been demonstrated. Within this framework, developing new specific DGT binding gels for iodine species could be useful to improve knowledge on geochemical behavior of iodine in aquatic environments. These important geochemical data could also allow a better risk assessment of nuclear facilities. The Ag doped-Cl (AgdCl) resin, developed by Triskem international, has already been used in extraction chromatography to selectively accumulate iodide (I-). In this work we present the first DGT application using the AgdCl resin in the binding gel. Laboratory investigations were performed to determine the selectivity and the accumulation capability of the AgdCl binding gel for the most common iodine species in aquatic environments. Key parameters such as iodide elution optimization, effective iodide diffusion coefficient, ionic strength, pH and ion competing effects will be also presented. Finally, some results of time series-experiments in natural waters will be shown to validate performances of the new DGT method.

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Le référentiel Matières Premières de l’Arc Liguro-Provençal (MP-ALP) : ressources siliceuses entre Vallée du Rhône et Apennins (COM)

HAL (Le Centre pour la Communication Scientifique Directe) (2013)

Antonin Tomasso Didier Binder Gabriele Martino Guillaume Porraz P. Šimon

Source

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Radionuclide migration at experimental polygon at Red Forest waste site in Chernobyl zone. Part 2: Hydrogeological characterization and groundwater transport modeling

Applied Geochemistry (2011)

D. Bugaï A. Skalskyy S.P. Dzhepo Yu.I. Kubko V. Kashparov

MODFLOW

TRACER

10.1016/j.apgeochem.2011.09.028

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Citations (36)