Volume 37, Number C1, February 2002ECORAD 2001: The Radioecology - Ecotoxicology of Continental and Estuatine Environments
|Page(s)||C1-573 - C1-577|
|Published online||14 October 2009|
Entry of technetium-99 into the human food chain through the use of seaweed as soil conditioner
Department of Environmental Science, University of Stirling, Stirling FK9 4LA, U.K.
The accumulation of 99Tc by Fucus vesiculosus and its subsequent use as a soil conditioner in coastal areas gives rise to a potential pathway for the transfer of 99Tc to terrestrial ecosystem and on to humans. Preliminary results from a small-scale study of the release of 99Tc from Fucus vesiculosus into a sandy, coastal soil suggest that around 20 % of the 99Tc present in the seaweed is released within 17 days (2.7 weeks) of its addition to the soil, even though the decomposition rate, measured by the CO2 production of soil microorganisms, remained low over that period. Further analyses will be carried out to determine the rate of 99Tc release in the latter part of the experiment when the decomposition rate had increased.
© EDP Sciences, 2002
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