1887

Abstract

Summary

The article reads about sorption properties of bentonites from the Cherkasy deposit towards 90Sr in case of degradation of cement-concrete components of engineered barrier system in near-surface radioactive waste storage facilities. Was determined the regularities of the impact of pH and Ca2+ ion concentration in model groundwater of the Chornobyl Exclusion Zone on the transformation and sorption properties of bentonites towards 90Sr. The contact with degraded cement structures of the near-surface repository causes decrease of the sorption properties of bentonite towards strontium. The degree of Sr adsorption is higher for natural Ca-bentonite than for Na-modified bentonite. Natural bentonite will more reliably isolate Sr within the radioactive waste storage facilities ensuring safety for humans and the natural environment.

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/content/papers/10.3997/2214-4609.2023520160
2023-11-07
2025-03-25
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References

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