Irrversible cesium adsorption capacity of granite-origin soil
Journal of Radioanalytical and Nuclear Chemistry(2023)
Abstract
The irreversible adsorption capacity of radioactive cesium in soil of granite origin was assessed via a desorption experiment. The results demonstrated that the cesium desorption only occurred when it reached 0.035% of the cation exchange capacity, despite the presence of the competing ion (K + ). The fixation of cesium on frayed edge sites, primarily ascribed to weathered mica and interpretable via the dual-site Langmuir model, may contribute to this irreversible binding. Consequently, the extraction of these minerals from granite-origin soil possesses the potential to diminish the concentration and volume of radioactive soil waste contamination.
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Key words
Radioactive cesium,Granite-origin soil,Fixation,Weathered mica,Frayed edge sites
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