BEHAVIORS and TRANSFERS of ANTHROPOGENIC RADIONUCLIDES (137Cs, 239+240Pu and 241Am) IN

BEHAVIORS AND TRANSFERS OF ANTHROPOGENIC RADIONUCLIDES (137Cs, 239+240Pu and 241Am) IN A PROTECTED ALPINE WETLAND (FRANCE)

Amélie LECLERCQ, Hervé MICHEL1, Violaine PHILIPPINI, Vittorio BARCI and Geneviève BARCI- FUNEL

Nice Institute of Chemistry – PCRE, UMR 7272 CNRS, University of Nice Sophia-Antipolis, Faculté des Sciences, Parc Valrose 06108 Nice, France

1 Corresponding author: [email protected] - tel: +33(4) 92 07 63 65 - fax: +33(4) 92 07 61 89

Supplementary materials

Three sediment cores were sampled in the South shore (opposite to the drainage basin) and the fine fraction was studied by γ-spectrometry to quantify 137Cs. In-depth profile of one sediment core is shown in Fig S. The core vertical distributions exhibit an important 137Cs activity in-depth (between 9 and 18 cm) correlated with the dredging of the lake around 1991-92. This shore was no longer sampled for this study dedicated of the behaviors and transfers of RN in a protected area.

1 3 7 C s * ( B q k g - 1 ) * a n a l y z e d b y γ- s p e c t r o m e t r y ( 6 6 1 . 7 k e V ) 0 200 400 600 800 cm0

Fig S1 137Cs in-depth profile (in Bq kg-1) in one sediment core sampled in the South shore

Anthropogenic RNs were mainly quantified in the fine fraction (d<2 mm) of the solid samples (e.g. [1]).

137Cs activities were measured in all solid core for the fine fraction (d<2 mm) and the coarse fraction (d>2 mm) crude or crushed and sieved at 2 mm. Mass weighted activities were calculated for the two fractions. Crude coarse fraction was considered only for one sediment core (B) because of the uncertainties generating by the unfilled counting geometry. Vertical distribution of 137Cs for the soil core and the sediment core B are shown in

Fig . For both solid cores, the coarse fraction (crushed or not) exhibit non negligible activities comparing to the activities of the fine fraction. However, mass weighted activities vertical distributions confirm the low impact of the coarse fraction on the all radioactivity.

a ) 1 3 7 C s * ( B q k g - 1 ) b ) 1 3 7 C s * ( B q k g - 1 ) * a n a l y z e d b y γ- s p e c t r o m e t r y ( 6 6 1 . 7 k e V ) * a n a l y z e d b y γ- s p e c t r o m e t r y ( 6 6 1 . 7 k e V ) c m 0 200 400 600 c m 0 2 0 0 4 0 0 6 0 0 8 0 0 0 0

- 5 - 5

- 1 0 - 1 0

- 1 5 - 1 5

- 2 0 - 2 0

- 2 5 - 2 5 dd<2 < 2 mmmm dd>2 > 2 mmmm crushedbroyée and sieved at 2 mm AP1mass weighted activities (d<2 and >2 mm crushed) dd>2 > 2 mmmm dm 2activities mm (d<2 and >2 mm)

Fig S2 137Cs in-depth profiles (Bq kg-1) of the fine fraction (d<2 mm), the coarse fraction (d>2 mm) crude, and crushed and sieved and mass weighted activities in a) the soil sore and b) the sediment core B

References

1. Lehto J, Hou X (2011) Chemistry and Analysis of Radionuclides. Wiley-VCH,, Weinheim