3/16/2023 0 Comments Strontium charge![]() Strontium-90 is a " bone seeker" that exhibits biochemical behavior similar to calcium, the next lighter group 2 element. Ī study of the pond alga Closterium moniliferum using stable strontium found that varying the ratio of barium to strontium in water improved strontium selectivity. ![]() ![]() spinosus, suggesting that it may be appropriate for use of nuclear wastewater. The study claims a highly selective biosorption capacity for strontium of S. Researchers have looked at the bioaccumulation of strontium by Scenedesmus spinosus ( algae) in simulated wastewater. Remediation Īlgae has shown selectivity for strontium in studies, where most plants used in bioremediation have not shown selectivity between calcium and strontium, often becoming saturated with calcium, which is greater in quantity and also present in nuclear waste. Exposure from contaminated water and food may increase the risk of leukemia and bone cancer. Its 29-year half-life means that it can take hundreds of years to decay to negligible levels. Strontium-90 is classified as high-level waste. It is present in significant amount in spent nuclear fuel, in radioactive waste from nuclear reactors and in nuclear fallout from nuclear tests.įor thermal neutron fission as in today's nuclear power plants, the fission product yield from uranium-235 is 5.7%, from uranium-233 6.6%, but from plutonium-239 only 2.0%. Medium-livedįission products ĩ0Sr is a product of nuclear fission. Note that 90Sr/Y is almost a pure beta particle source the gamma photon emission from the decay of 90Y is so infrequent that it can normally be ignored.ĩ0Sr has a specific activity of 5.21 TBq/g. 90Sr undergoes β − decay with a half-life of 28.79 years and a decay energy of 0.546 MeV distributed to an electron, an antineutrino, and the yttrium isotope 90Y, which in turn undergoes β − decay with a half-life of 64 hours and a decay energy of 2.28 MeV distributed to an electron, an antineutrino, and 90Zr (zirconium), which is stable. Naturally occurring strontium is nonradioactive and nontoxic at levels normally found in the environment, but 90Sr is a radiation hazard. Strontium-90 has applications in medicine and industry and is an isotope of concern in fallout from nuclear weapons, nuclear weapons testing, and nuclear accidents. It undergoes β − decay into yttrium-90, with a decay energy of 0.546 MeV. ) is a radioactive isotope of strontium produced by nuclear fission, with a half-life of 28.8 years.
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