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Behaviour of chlorine 36 in cultivated terrestrial ecosystems.

C. Colle, S. Mauger, C. Massiani, V.A. Kashparov, G. Grasset Actes du congrès ECORAD, 3-7 sept 2001, Aix en Provence, France Radioprotection - Colloques, volume 37, C1-491/ C1-496.

Document type > *Article de revue

Keywords > radioecology under controlled conditions, controlled environment, ecosystem, soil

Research Unit > IRSN/DEI/SECRE/LRE

Authors > COLLE Claude

Publication Date > 05/06/2002

Summary

The retention of chlorine 36 by soils is studied. Batch investigations are performed to determine distribution coefficient values for various types of soils with physico chemical properties covering a wide range of pH organic matter and sesquioxydes content. The soil /soil solution distribution coefficient values are very weak and seem to be mainly conditioned by the organic carbon and the sesquioxydes content of the soil. Root uptake of chlorine 36 in some vegetables is also determined for root vegetable (radish), a leafy-vegetable (lettuce) and a fruit-vegetable (bean) are experimented. Cultures are made on thee types of soil with contrasted properties: “acidic”, “calcareous” and “organic”. The values of the soil/plant concentration ratios expressed with regard to the dry weight of vegetables are very high; they vary between 18 and 377 according to the organ of the plant and the soil type. The strongest 36Cl root uptake value is obtained with the calcareous soil and the lowest one on the organic one.

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