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Specific Retention of Radiocesium in Volcanic Ash Soils Devoid of Micaceous Clay Minerals

Emmanuel Joussein*,a, Nathalie Kruytsb, Dominique Righia, Sabine Petita and Bruno Delvauxb

a CNRS–UMR 6532 HydrASA, Faculté des Sciences, Université de Poitiers, 40, avenue du Recteur Pineau, 86022 Poitiers cedex, France
b Université Catholique de Louvain, Unité des Sciences du Sol, 2/10, Place Croix du Sud, 1348 Louvain-la-Neuve, Belgium



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  		Fig. 1. The 137Cs+ sorption–desorption experiments. S: sorption; D1: first desorption by K+-Ca2+–saturated resin; D2: second desorption by H+-saturated resin. The different symbols refer to the different soils.

 


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  		Fig. 2. Relationship between the net retention and the 137Cs+ rhizospheric mobilization (137Cs-RM) expressed in percentage of initial 137Cs soil contamination. {Delta}: net retention after desorption by K+–Ca2+–saturated resin (D1);{diamondsuit}: net retention after desorption by H+–saturated resin (D2).

 


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  		Fig. 3. Log-log plot of rhizospheric 137Cs+ transfer factor on a weight base (TF) against the radiocesium interception potential (RIP) in soil. {blacksquare}: this study; {diamond}: collection of soils with widely varying properties (adapted from Delvaux et al., 2000).

 




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