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Root uptake by cultivated vegetables of radionuclides coming from contaminated algae used as organic manure in soil.

C. Colle, M. Masson, P. Hurtevent, M. Morello and D. Hebert Actes du congrès ECORAD, 3-7 sept 2001, Aix en Provence, France Radioprotection - Colloques, volume 37, C1-1329/ C1-1333.

Document type > *Article de revue

Keywords > radioecology under controlled conditions, contamination, seaweed, soil

Research Unit > IRSN/DEI/SECRE/LRE, IRSN/DEI/SECRE/LRC

Authors > COLLE Claude, MASSON Michel

Publication Date > 10/06/2002

Summary

In certain areas of the French Atlantic coast, algae of marine origin are used as organic fertilizer, particularly for vegetables cultivation. An experiment was carried out to estimate the transfers of radioactivity towards agricultural productions which could result from this practice in the case where algae were contaminated. Algae (fucus vesiculosus) were cultivated in aquarium with sea water containing a mixture of radionuclides: 22Na, 60Co, 90Sr, 99Tc, 106Ru, 125Sb, 134,137Cs, 238,239+240Pu, 241Am, 244Cm. These algae were mixed, in a lysimeter, with a silty sandy soil. Some vegetables, potatoes, lettuces, radishes, beans, tomatoes were cultivated on this manured soil. The soil to plant concentration ratios are given for the edible organs of the plants grown the year following the addition of algae in the soil and for cultures made several years later. On the other hand chemical extractions were performed to evaluate the bio-available fraction of radionuclides in the soil.
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