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Open AccessArticle

A Batch Experiment of Cesium Uptake Using Illitic Clays with Different Degrees of Crystallinity

1
Research Center for Geochronology and Isotope Analysis, Korea Basic Science Institute (KBSI), 162 Yeongudanji-ro, Ochang-eup, Cheongju 28119, Korea
2
Department of Earth System Sciences, Yonsei University, Seoul 03722, Korea
3
Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources (KIGAM), Daejeon 34132, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Constantinos V. Chrysikopoulos
Water 2021, 13(4), 409; https://doi.org/10.3390/w13040409
Received: 28 December 2020 / Revised: 25 January 2021 / Accepted: 29 January 2021 / Published: 4 February 2021
(This article belongs to the Section Hydrology and Hydrogeology)
Radiocesium released by the severe nuclear accident and nuclear weapon test is a hazardous material. Illitic clays play a key role in the spatial distribution of radiocesium in groundwater environments due to selective uptake sites at the illite mineral, such as frayed edge sites. However, the cesium uptake capabilities of illitic clays are diverse, which could be associated with the illite crystallinity. This study was performed to determine the cesium uptake of illitic clays and evaluate the crystallinity effects on cesium uptake using statistical approaches. A total of 10 illitic clays showed various crystallinity, which was parameterized by the full width at half maximum (FWHM) at 10 Å XRD peak ranging from 0.15 to 0.64. The uptake behavior of illitic clays was well fitted with the Freundlich model (i.e., r2 > 0.946). The uptake efficiency of illitic clays increased with the decrease in dissolved cesium concentrations. The cesium uptake was significantly correlated with the FWHM and cation exchange capacity, suggesting that the uptake becomes higher with decreasing crystallinity through expansion of the edge site and/or formation of ion-exchangeable sites. View Full-Text
Keywords: illitic clay; radiocesium; cesium uptake capability; illite crystallinity; cation exchange capacity; frayed edge sites (FES) illitic clay; radiocesium; cesium uptake capability; illite crystallinity; cation exchange capacity; frayed edge sites (FES)
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MDPI and ACS Style

Hwang, J.; Choung, S.; Shin, W.; Han, W.S.; Chon, C.-M. A Batch Experiment of Cesium Uptake Using Illitic Clays with Different Degrees of Crystallinity. Water 2021, 13, 409. https://doi.org/10.3390/w13040409

AMA Style

Hwang J, Choung S, Shin W, Han WS, Chon C-M. A Batch Experiment of Cesium Uptake Using Illitic Clays with Different Degrees of Crystallinity. Water. 2021; 13(4):409. https://doi.org/10.3390/w13040409

Chicago/Turabian Style

Hwang, Jeonghwan; Choung, Sungwook; Shin, Woosik; Han, Weon S.; Chon, Chul-Min. 2021. "A Batch Experiment of Cesium Uptake Using Illitic Clays with Different Degrees of Crystallinity" Water 13, no. 4: 409. https://doi.org/10.3390/w13040409

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