Published Online: 15 DEC 2011
Copyright © 2011 John Wiley & Sons, Ltd. All rights reserved.
Encyclopedia of Inorganic and Bioinorganic Chemistry
How to Cite
Guillén, F. J., Baeza, A. and Salas, A. 2011. Strontium: Radionuclides. Encyclopedia of Inorganic and Bioinorganic Chemistry. .
- Published Online: 15 DEC 2011
Strontium has several radioactive isotopes, with 90Sr being the most important in the environment. This radionuclide dispersed worldwide as a consequence of the atmospheric nuclear weapon tests in the 1960s, and is locally enhanced owing to the accidents involving radioactive material. 90Sr is a pure β-emitter and it may be detected by several detection techniques (gas-flow proportional, liquid scintillation, Cerenkov counting, and ICP-MS), after an appropriate radiochemical separation. The environmental behavior of radiostrontium is governed by its chemical similarities to calcium. It is usually associated with the mobile and bioavailable fractions in soils, and with the low MW fraction in aquatic ecosystems. The potential human exposure to radiostrontium is mainly due to the ingestion of food, milk and cereals being the two major sources. This exposure can be reduced to some extent by the addition of calcium fertilizers to minimize the soil-to-plant transfer of radiostrontium, and by increasing cattle calcium intake to decrease the 90Sr content in milk.