Adsorption of cesium on Czech smectite-rich clays—A comparative study

Vejsada, J.; Hradil, David; Řanda, Z.; Jelínek, Emil; Štulı́k, Karel

doi:10.1016/j.clay.2005.03.003

Cited by 58 publications

(29 citation statements)

References 25 publications

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“…3). In contrast, Vejsada et al (2005) found strong competition between Cs and K toward clay surfaces, while this competition was weaker for Ca and Na. According to Mell et al (2006a) the highest Cs amounts were adsorbed by the albitic claystone samples of BSF with the highest illite contents.…”

Section: Sorption Mechanismsmentioning

confidence: 50%

Preliminary results on the Co, Sr and Cs sorption properties of the analcime-containing rock type of the Boda Siltstone Formation

Sipos¹,

Németh²,

Máthé³

2010

Central European Geology

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The search for nuclear waste deposits have been focusing on formations containing large amounts of clay minerals, as they potentially possess significant isolation capacity due to their radionuclide sorption ability. In this study the immobilization processes for Co, Sr and Cs ions on the recently described analcime-containing rock type of the Boda Siltstone Formation were investigated by batch sorption experiments. Our data suggest a high radionuclide immobilization capacity for this rock formation in the following order: Sr > Co > Cs. The dominant immobilization processes were found to be ion exchange and precipitation for Co and Sr, and chemisorption for Cs. The necessity of further sorption analyses on the studied rock formation is also raised.

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Section: Sorption Mechanismsmentioning

confidence: 50%

Preliminary results on the Co, Sr and Cs sorption properties of the analcime-containing rock type of the Boda Siltstone Formation

Sipos¹,

Németh²,

Máthé³

2010

Central European Geology

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“…Illite and other mica-like minerals are excellent caesium adsorbents from low concentration solutions due to the presence of weathered, hydrated crystallite edges [24], the so called frayed edges. Caesium cation is selectively and strongly adsorbed at these frayed-edge sites of illite, but smectites adsorb more Cs + [25]. Boda Claystone contains various kind of illite.…”

Section: Aspects Concerning Radionuclide Sorption Propertiesmentioning

confidence: 99%

Clay mineralogy of the Boda Claystone Formation (Mecsek Mts., SW Hungary)

Németh

Máthé²,

Pekker

et al. 2016

Open Geosciences

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Boda Claystone Formation (BCF) is the host rock of the planned site for high level nuclear waste repository in Hungary. Samples representing the dominant rock types of BCF were studied: albitic claystone, claystone with high illite content, and analcime bearing claystone. Clay minerals in these three rock types were characterized by Xray powder di raction (XRD), transmission electron microscopy (TEM) and thermal analysis (DTA-TG), and the results were discussed from the point of view of the radionuclide sorption properties being studied in the future. Mineral compositions of bulk BCF samples vary in wide ranges. In the albitic sample, besides the dominant illite, few percent of chlorite represents the layer silicates in the clay fraction. Illite is the dominating phase in the illitic sample, with a few percent of chlorite. HRTEM study revealed that the thickness of illite particles rarely reaches 10 layers, usually are of 5-6 TOT layer thick. Illite crystals are generally thicker in the albitic sample than in the illitic one. The signi cant di erence between the clay mineral characterisitics of the analcimous and the other two samples is that the former contains regularly interstratied chlorite/smectite beside the dominant illite. Based on the structural and chemical data two illite type minerals are present in the BCF samples: 1M polytype containing octahedral Fe and Mg besides Al, 2M polytype illite generally is free of Fe and Mg. Close association of very thin illite plates and nanosized hematite crystals is typical textural feature for BCF. The goal of this study is to provide solid mineralogical basis for further studies focusing on radionuclide sorption properties.

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“…We suggest that these materials were soils composed of quartz, fine-grained (~10 −2 mm) clay minerals such as hydromicas (e.g., illite), Ca and Mg carbonates, and organic matter including both soil organic matter and biomass. If we consider Al as the characteristic and determining component of clays, then with an average content of Al 2 O 3 in illites of 25 wt% (Vejsada et al 2005), the Al 2 O 3 content of about 9 wt% in moldavites corresponds to ~36% clay component. Assuming a typical SiO 2 content of 50 wt% in the considered clay, about 18% of moldavite matter is covered by SiO 2 from phyllosilicates.…”

Section: Source Materials Of Moldavitesmentioning

confidence: 99%

Geochemical characterization of moldavites from a new locality, the Cheb Basin, Czech Republic

Řanda

Mizera

Frána

et al. 2008

Meteorit & Planetary Scien

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Abstract-Twenty-three moldavites from a new locality, the Cheb Basin in Western Bohemia, were analyzed by instrumental neutron activation analysis for 45 major and trace elements. Detailed comparison of the Cheb Basin moldavites with moldavites from other substrewn fields in both major and trace element composition shows that the Cheb Basin is a separate substrewn field. The geochemical data obtained are discussed with respect to the source materials and processes leading to formation of moldavites. The data show that three groups of Cheb Basin moldavites exist. Ten samples of group 1 are characterized by the lowest content of Al, Fe, Na, and other elements representing phyllosilicate minerals, and by high Ca + Mg contents related probably to carbonates.

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Adsorption of cesium on Czech smectite-rich clays—A comparative study

Cited by 58 publications

References 25 publications

Preliminary results on the Co, Sr and Cs sorption properties of the analcime-containing rock type of the Boda Siltstone Formation

Preliminary results on the Co, Sr and Cs sorption properties of the analcime-containing rock type of the Boda Siltstone Formation

Clay mineralogy of the Boda Claystone Formation (Mecsek Mts., SW Hungary)

Geochemical characterization of moldavites from a new locality, the Cheb Basin, Czech Republic

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