Volume 37, Numéro C1, February 2002ECORAD 2001: The Radioecology - Ecotoxicology of Continental and Estuatine Environments
|Page(s)||C1-815 - C1-820|
|Publié en ligne||25 mars 2010|
Silver-110 m in marine organisms, soil and vegetables of Hong Kong
Department of Physics, The University of Hong Kong, Pokfulam Road, Hong Kong
110mAg is a fission product inside nuclear reactors and can be released into the environment during accidents. In this study, accumulation and transfer of 110mAg in simulated marine and terrestrial ecosystems were studied. The kinetic behavior of 110mAg in the system was summarized. It is noted that most of the 110mAg accumulated in the sediment and seashore mollusks can absorb more 110mAg than fish. Accumulation and transfer of 110mAg in terrestrial ecosystems were studied in pot culture approach where vegetables such as lettuces, spinach, kale, cucumbers, peppers, carrots, egg plants and beans were cultured in soil that contains 110mAg in 10 Bq gsoil-1. Edible vegetable samples were collected and measured at different growth stages. The transfer factors were calculated. The results showed that 110mAg could be transferred from soil into plants, and spinach may be a critical vegetable. The leaching and migration of 110mAg in soils were also studied by soil column experiments. Results show that there is no 110mAg in leaching water and most of it stays in the topsoil of 2 cm deep, and 110mAg vertical migration is little. A computer model based on ECOSYS-87 to simulate the transport of 110mAg in the different compartments along the routes will be developed.
© EDP Sciences, 2002
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