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oa Influence of Ph and Ca2+ on 90Sr Sorption Capacities of the Cherkasy Bentonites (Ukraine)
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 17th International Conference Monitoring of Geological Processes and Ecological Condition of the Environment, Nov 2023, Volume 2023, p.1 - 5
Abstract
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.