A Review on Adsorption Mechanisms and Distribution Coefficient (Kd) of Cesium in Clay/Host RockShow others and affiliations
2023 (English)In: Proceedings of the 23rd Pacific Basin Nuclear Conference, Volume 2 - PBNC 2022, Springer Nature , 2023, p. 898-912Conference paper, Published paper (Refereed)
Abstract [en]
For the disposal of high-level radioactive waste (HLW), the deep geological disposal is recognized as an effective method. The distribution coefficient (Kd) of radionuclides on buffer/backfill materials or host rock is one of the key parameters used in the safety assessment of geological repository. 137Cs is one of the high-yield (t1/2 = 30.1 y, 6%) fission products in spent fuels, its high solubility makes it likely to migrate through groundwater to the biosphere. Multibarrier system prevents leakage of radionuclides to the environment. The present review discusses the general mechanisms of cesium adsorption by minerals, elaborates the parameters which influence adsorption of cesium contain concentration of cesium, pH, humic acid, competitive cations and properties of minerals. Furthermore, we have collected the Kd values from cesium adsorption studies concerned with the minerals conducted during the past two decades, and analyzed by the probabilistic modelling to obtain the best-estimated Kd values of Cs adsorption on bentonite, granite and clay under different solution conditions.
Place, publisher, year, edition, pages
Springer Nature , 2023. p. 898-912
Keywords [en]
Cesium, Probabilistic modelling, Safety assessment, Sorption
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-338627DOI: 10.1007/978-981-19-8780-9_86Scopus ID: 2-s2.0-85161129717OAI: oai:DiVA.org:kth-338627DiVA, id: diva2:1809434
Conference
23rd Pacific Basin Nuclear Conference, PBNC 2022, Chengdu, China, Nov 1 2022 - Nov 4 2022
Note
Part of ISBN 9789811987793
QC 20231103
2023-11-032023-11-032023-11-03Bibliographically approved