Journal ArticleDOI
Desorption of Cs+ Ions Intercalated in Vermiculite Clay through Cation Exchange with Mg2+ Ions
Reads0
Chats0
TLDR
In this article, Cs+ ions were desorbed by reacting with magnesium ions (Mg2+) in vermiculite clay (Verm), achieving 70-90% removal of adsorbed ions.Abstract:
Cesium ions (Cs+) strongly adsorbed in vermiculite clay (Verm) were efficiently desorbed by reacting with magnesium ions (Mg2+). 70–90% removal of adsorbed Cs+ ions was achieved when Verm loaded wi...read more
Citations
More filters
Journal ArticleDOI
Cesium adsorption/desorption behavior of clay minerals considering actual contamination conditions in Fukushima.
Hiroki Mukai,Atsushi Hirose,Satoko Motai,Ryosuke Kikuchi,Keitaro Tanoi,Tomoko M. Nakanishi,Tsuyoshi Yaita,Toshihiro Kogure +7 more
TL;DR: It was found that partially-vermiculitized biotite from Fukushima sorbed 137Cs far more than the other clay minerals on the same substrate, implying that selective sorption to WB caused depletion of radiocesium in the solution and less Sorption to the coexisting minerals.
Journal ArticleDOI
Nature of the sites involved in the process of cesium desorption from vermiculite
TL;DR: Quantitative analysis of results suggested that cesium ions sorbed on external (edge+basal) sorption sites can be desorbed by ammonium ions, and this study provides important information, such as the nature of the sites involved in the exchange process, when the thermodynamic formalism is considered.
Journal ArticleDOI
Enhanced desorption of cesium from collapsed interlayer regions in vermiculite by hydrothermal treatment with divalent cations.
TL;DR: X-ray diffraction analysis results suggested that Cs desorption was completed through enhanced diffusion of Mg2+ cations into collapsed interlayer space under hydrothermal condition resulting in subsequent interlayer decollapse and readily release of Cs+.
Journal ArticleDOI
Collective Structural Changes in Vermiculite Clay Suspensions Induced by Cesium Ions
Ryuhei Motokawa,Hitoshi Endo,Shingo Yokoyama,Shotaro Nishitsuji,Tohru Kobayashi,Shinichi Suzuki,Tsuyoshi Yaita +6 more
TL;DR: It was found that the abruption of the clay sheets was induced by the localization of Cs+ at the interlayer, which provides important information for predicting the environmental fate of radioactive Cs in polluted areas, and for developing methods to extract Cs from the soil and reduce radioactivity.
Journal ArticleDOI
Cesium desorption behavior of weathered biotite in Fukushima considering the actual radioactive contamination level of soils.
Hiroki Mukai,Hiroki Mukai,Kenji Tamura,Ryosuke Kikuchi,Yoshio Takahashi,Tsuyoshi Yaita,Toshihiro Kogure +6 more
TL;DR: In the experiments, 137Cs was barely desorbed from WB even by the treatments with solutions of NaNO3 and LiNO3 if the duration for the sorption was longer than approximately two weeks, which implies that Cs sorbed in WB became more strongly fixed with time.
References
More filters
Journal ArticleDOI
Selective sorption and fixation of cations by clay minerals : A review
TL;DR: In this paper, a review of the literature concerning selective sorption and fixation of K and similar cations by clay minerals and soil clays and the mechanisms of these reactions are reviewed.
Journal ArticleDOI
Adsorption of cesium on minerals: A review
TL;DR: In this article, the adsorption behavior of cesium on pure minerals is reviewed, and the effect of parameters, such as the concentration, the properties of the mineral and the characteristics of the solution phase, on the results of this process are discussed.
Journal ArticleDOI
Sorption of cesium on illite: Non-equilibrium behaviour and reversibility
TL;DR: In this article, a mechanistic interpretation for the observed sorption and isotopic exchange behavior is proposed whereby cesium migrates slowly to energetically favorable interlayer sites from which it is not easily released.
Journal ArticleDOI
Kinetics of cesium sorption on illite
Rob N.J. Comans,Daryl E. Hockley +1 more
TL;DR: In this paper, two kinetic models incorporating Freundlich isotherms and an irreversible process are used to describe sorption data spanning a range of cesium concentrations, and they predict that effectively instantaneous and reversible kinetic processes control ceium sorption over time scales of a few days and less.
Journal ArticleDOI
Measurement of soil contamination by radionuclides due to the Fukushima Dai-ichi Nuclear Power Plant accident and associated estimated cumulative external dose estimation.
TL;DR: The estimated external dose rates and cumulative doses show that careful countermeasures and remediation will be needed as a result of the accident, and detailed measurements of radionuclide deposition densities in soil will be important input data to conduct these activities.