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J Environ Radioact. 2013 Apr;118:9-14. doi: 10.1016/j.jenvrad.2012.11.006. Epub 2012 Dec 7.

Quantification of exchangeable and non-exchangeable organically bound tritium (OBT) in vegetation.

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  • 1Environmental Technologies Branch, Chalk River Laboratories, AECL, Chalk River, Ontario, K0J 1J0 Canada. kimsb@aecl.ca

Abstract

The objective of this study is to quantify the relative amounts of exchangeable organically bound tritium (OBT) and non-exchangeable OBT in various vegetables. A garden plot at Perch Lake, where tritium levels are slightly elevated due to releases of tritium from a nearby nuclear waste management area and Chalk River Laboratories (CRL) operations, was used to cultivate a variety of vegetables. Five different kinds of vegetables (lettuce, cabbage, tomato, radish and beet) were studied. Exchangeable OBT behaves like tritium in tissue free water in living organisms and, based on past measurements, accounts for about 20% of the total tritium in dehydrated organic materials. In this study, the percentage of the exchangeable OBT was determined to range from 20% to 57% and was found to depend on the type of vegetables as well as the sequence of the plants exposure to HTO.

Crown Copyright © 2012. Published by Elsevier Ltd. All rights reserved.

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