The decontamination effectiveness of bentonite from Polish geological deposits in reducing the radiocaesium transfer to hen eggs was examined. The egg white radiocaesium concentration was higher than that in egg yolk. The highest decontamination efficacy in all egg components was noticed in animals treated with bentonite from the first day of radionuclide administration. Generally, the radioactivity concentration in hens treated simultaneously with ¹³⁷CsCI and a caesium binder were lower by >50% than those in the controls. The decontamination efficiency lowered with the delayed bentonite treatment. In Poland bentonite seems to be an alternative to other decontamination agents.
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