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Olga Dorzhieva
Institute of Ore Geology, Petrography, Mineralogy and Geochemistry, Russian Academy of Science (IGEM RAS), 119017 Moscow, Russia

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Journal article
Published: 07 October 2020 in Sustainability
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Clay minerals may transform in various systems under the influence of geological, biological, or technogenic processes. The most active to the geological environment are technogenic and biochemical processes that, in a relatively short time, can cause transformation of the rocks’ composition and structure and formation of new minerals, especially clay minerals. Isolation of radioactive waste is a complex technological problem. This work considers the influence of alkaline solutions involved in the radioactive waste (RW) disposal process. In the Russian Federation, due to historical reasons, radioactive waste has accumulated in various types of repositories and temporary storages. All these facilities are included in the federal decommissioning program. Solid radioactive wastes in cement slurries at the landfill site of the Angara Electrolysis Chemical Combine are buried in sandstones and currently suffer the influence of a highly alkaline and highly saline groundwater storage area, which leads to a considerable transformation of the sandstones. This influence results in the formation of peculiar "technogenic” illites that have smectite morphology but illite structure which was confirmed by modeling of X-ray diffraction (XRD) patterns. The described transformations will lead to the increase of porosity and permeability of the sandstones. The research results can be used in assessing the potential contamination of the areas adjacent to the disposal site and in planning the decommissioning measures of this facility.

ACS Style

Victoria Krupskaya; Anatoliy Boguslavskiy; Sergey Zakusin; Olga Shemelina; Mikhail Chernov; Olga Dorzhieva; Ivan Morozov. The Influence of Liquid Low-Radioactive Waste Repositories on the Mineral Composition of Surrounding Soils. Sustainability 2020, 12, 8259 .

AMA Style

Victoria Krupskaya, Anatoliy Boguslavskiy, Sergey Zakusin, Olga Shemelina, Mikhail Chernov, Olga Dorzhieva, Ivan Morozov. The Influence of Liquid Low-Radioactive Waste Repositories on the Mineral Composition of Surrounding Soils. Sustainability. 2020; 12 (19):8259.

Chicago/Turabian Style

Victoria Krupskaya; Anatoliy Boguslavskiy; Sergey Zakusin; Olga Shemelina; Mikhail Chernov; Olga Dorzhieva; Ivan Morozov. 2020. "The Influence of Liquid Low-Radioactive Waste Repositories on the Mineral Composition of Surrounding Soils." Sustainability 12, no. 19: 8259.

Journal article
Published: 11 February 2020 in Minerals
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A representative collection of K-dioctahedral 1M micas ranging in composition from (Mg, Fe)-poor illites to aluminoceladonites through Mg-rich illites (Fe-poor varieties) and from Fe-bearing, Mg-rich illites to celadonites through Fe-illites, Al-glauconites and glauconites (Fe-bearing varieties) was studied by Fourier-transform infrared (FTIR) spectroscopy in the middle-infrared region. Analysis and comparison of the relationships between the band positions and cation compositions of Fe-poor and Fe-bearing K-dioctahedral micas provided a generalized set of FTIR identification criteria that include the band positions and profiles in the regions of Si–O bending, Si–O stretching, and OH-stretching vibrations. FTIR data allow unambiguous identification of illites, aluminoceladonites, and celadonites, as well as distinction between Fe-illites and illites proper, as well as between Al-glauconites and glauconites. Specifically, a sharp maximum from the AlOHMg stretching vibration at ~3600 cm−1, the presence of a MgOHMg stretching vibration at 3583–3585 cm−1, as well as characteristic band positions in the Si–O bending (435–439, 468–472 and 509–520 cm−1) and stretching regions (985–1012 and 1090–1112 cm−1) are clearly indicative of aluminoceladonite. The distinction between Fe-illites and Al-glauconites, which have similar FTIR features, requires data on cation composition and unit-cell parameters.

ACS Style

Bella B. Zviagina; Victor A. Drits; Olga V. Dorzhieva. Distinguishing Features and Identification Criteria for K-Dioctahedral 1M Micas (Illite-Aluminoceladonite and Illite-Glauconite-Celadonite Series) from Middle-Infrared Spectroscopy Data. Minerals 2020, 10, 153 .

AMA Style

Bella B. Zviagina, Victor A. Drits, Olga V. Dorzhieva. Distinguishing Features and Identification Criteria for K-Dioctahedral 1M Micas (Illite-Aluminoceladonite and Illite-Glauconite-Celadonite Series) from Middle-Infrared Spectroscopy Data. Minerals. 2020; 10 (2):153.

Chicago/Turabian Style

Bella B. Zviagina; Victor A. Drits; Olga V. Dorzhieva. 2020. "Distinguishing Features and Identification Criteria for K-Dioctahedral 1M Micas (Illite-Aluminoceladonite and Illite-Glauconite-Celadonite Series) from Middle-Infrared Spectroscopy Data." Minerals 10, no. 2: 153.

Journal article
Published: 11 October 2019 in Minerals
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This study is devoted to studying the sorption of 137Cs on mineral sorbents at a wide pH range, from 2 to 10, as well as to studying sorption mechanisms. In order to obtain the most reliable sorption characteristics, samples of high purity were examined as sorbents: bentonite, glauconite, zeolite, and diatomite. A detailed description of their mineral composition, cation exchange capacity and specific surface of sorbents is given. XRD, XRF, FTIR, SEM, and BET adsorption methods were used for assaying. The sorption and desorption values were identified for each sorbent. As a result of the conducted research, it can be concluded that 137Cs sorption mainly occurs through the exchange reaction on zeolite, glauconite and bentonite. The highest cesium Kd was observed on zeolite due to its high CEC and amounted to 4.05 mg/L at pH 7. The higher sorption capacity of glauconite in comparison with bentonite is primarily due to the high layer charge which is mainly localized in tetrahedral sheets, and to the existence of highly selective sorption sites (frayed edge sites) on the glauconite surface. Diatomite showed the lowest sorption capacity provided by the presence of a small quantity of smectite and kaolinite in its composition. The values of desorption increase in the following order: zeolite < bentonite ~ diatomite < glauconite.

ACS Style

Petr Belousov; Anna Semenkova; Tolganay Egorova; Anna Romanchuk; Sergey Zakusin; Olga Dorzhieva; Ekaterina Tyupina; Yulia Izosimova; Inna Tolpeshta; Michail Chernov; Victoria Krupskaya. Cesium Sorption and Desorption on Glauconite, Bentonite, Zeolite and Diatomite. Minerals 2019, 9, 625 .

AMA Style

Petr Belousov, Anna Semenkova, Tolganay Egorova, Anna Romanchuk, Sergey Zakusin, Olga Dorzhieva, Ekaterina Tyupina, Yulia Izosimova, Inna Tolpeshta, Michail Chernov, Victoria Krupskaya. Cesium Sorption and Desorption on Glauconite, Bentonite, Zeolite and Diatomite. Minerals. 2019; 9 (10):625.

Chicago/Turabian Style

Petr Belousov; Anna Semenkova; Tolganay Egorova; Anna Romanchuk; Sergey Zakusin; Olga Dorzhieva; Ekaterina Tyupina; Yulia Izosimova; Inna Tolpeshta; Michail Chernov; Victoria Krupskaya. 2019. "Cesium Sorption and Desorption on Glauconite, Bentonite, Zeolite and Diatomite." Minerals 9, no. 10: 625.

Journal article
Published: 03 April 2019 in Геохимия
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Complex studies revealed changes in the composition, structure, and properties of bentonite clays from the Taganskoye (Kazakhstan) and Dashkovskoe (Moscow region) deposits due to the thermochemical treatment. The leaching of cations from the interlayer and octahedral positions, protonation of the interlayer and OH-groups, leads to modification of the interlayer and 2:1 layer composition, which in turn contributes to significant changes in properties:-a decrease in the cation exchange capacity due to a decrease in the layer charge and increase in the specific surface due to destruction and partial amorphization. Bentonites from the Dashkovskoye deposit demonstrated higher resistance to thermochemical treatment than the bentonites from the Taganskoye deposit due to the protecting effect of the organic matter. Results of the work showed that even after quite intensive thermochemical treatment (13M HNO3, 90 °C, 5 hours), bentonite clays retain a significant part of the adsorption capacity.

ACS Style

V. V. Krupskaya; S. V. Zakusin; E. A. Tyupina; O. V. Dorzhieva; M. S. Chernov; Ya. V. Bychkova. Transformation of the montmorillonite structure and its adsorption properties due to the thermochemical treatment. Геохимия 2019, 64, 300 -319.

AMA Style

V. V. Krupskaya, S. V. Zakusin, E. A. Tyupina, O. V. Dorzhieva, M. S. Chernov, Ya. V. Bychkova. Transformation of the montmorillonite structure and its adsorption properties due to the thermochemical treatment. Геохимия. 2019; 64 (3):300-319.

Chicago/Turabian Style

V. V. Krupskaya; S. V. Zakusin; E. A. Tyupina; O. V. Dorzhieva; M. S. Chernov; Ya. V. Bychkova. 2019. "Transformation of the montmorillonite structure and its adsorption properties due to the thermochemical treatment." Геохимия 64, no. 3: 300-319.

Journal article
Published: 01 March 2019 in Geochemistry International
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—Complex studies revealed transformations of composition, structure, and properties of bentonite clays of the Taganskoe (Kazakhstan) and Dahskovskoe (Moscow oblast) deposits under thermochemical treatment. Leaching of cations from interlayer and octahedral sites, protonation of interlayer and OH-groups lead to the modification of interlayer and 2 : 1 layer composition. This, in turn, causes significant changes of properties: a decrease of cation exchange capacity owing to the decrease of layer charge and increase of specific surface through the decomposition and partial amorphization of structure. Bentonites of the Dashkovskoe deposit showed the higher resistance to the thermochemical impact than bentonites of the Taganskoe deposit owing to the isolating action of organic matter. Obtained results demonstrated that bentonite clays preserve most of adsorption properties even under such strong thermochemical influence (13 М HNO3, 90°С, 5 h).

ACS Style

V. V. Krupskaya; S. V. Zakusin; Ekaterina Tyupina; O. V. Dorzhieva; Mikhail Chernov; Ya. V. Bychkova. Transformation of Structure and Adsorption Properties of Montmorillonite under Thermochemical Treatment. Geochemistry International 2019, 57, 314 -330.

AMA Style

V. V. Krupskaya, S. V. Zakusin, Ekaterina Tyupina, O. V. Dorzhieva, Mikhail Chernov, Ya. V. Bychkova. Transformation of Structure and Adsorption Properties of Montmorillonite under Thermochemical Treatment. Geochemistry International. 2019; 57 (3):314-330.

Chicago/Turabian Style

V. V. Krupskaya; S. V. Zakusin; Ekaterina Tyupina; O. V. Dorzhieva; Mikhail Chernov; Ya. V. Bychkova. 2019. "Transformation of Structure and Adsorption Properties of Montmorillonite under Thermochemical Treatment." Geochemistry International 57, no. 3: 314-330.

Journal article
Published: 23 March 2017 in Minerals
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This paper discusses the mechanism of montmorillonite structural alteration and modification of bentonites’ properties (based on samples from clay deposits Taganskoye, Kazakhstan and Mukhortala, Buriatia) under thermochemical treatment (treatment with inorganic acid solutions at different temperatures, concentrations and reaction times). Treatment conditions were chosen according to those accepted in chemical industry for obtaining acid modified clays as catalysts or sorbents. Also, more intense treatment was carried out to simulate possible influence at the liquid radioactive site repositories. A series of methods was used: XRD, FTIR, ICP-AES, TEM, nitrogen adsorption, and particle size analysis. It allowed revealing certain processes: transformation of montmorillonite structure which appears in the leaching of interlayer and octahedral cations and protonation of the interlayer and –OH groups at octahedral sheets. In turn, changes in the structure of the 2:1 layer of montmorillonite and its interlayer result in significant alterations in the properties: reduction of cation exchange capacity and an increase of specific surface area. Acid treatment also leads to a redistribution of particle sizes and changes the pore system. The results of the work showed that bentonite clays retain a significant portion of their adsorption properties even after a prolonged and intense thermochemical treatment (1 M HNO3, 60 °C, 108 h).

ACS Style

Victoria V. Krupskaya; Sergey V. Zakusin; Ekaterina A. Tyupina; Olga V. Dorzhieva; Anatoliy P. Zhukhlistov; Petr E. Belousov; Maria N. Timofeeva. Experimental Study of Montmorillonite Structure and Transformation of Its Properties under Treatment with Inorganic Acid Solutions. Minerals 2017, 7, 49 .

AMA Style

Victoria V. Krupskaya, Sergey V. Zakusin, Ekaterina A. Tyupina, Olga V. Dorzhieva, Anatoliy P. Zhukhlistov, Petr E. Belousov, Maria N. Timofeeva. Experimental Study of Montmorillonite Structure and Transformation of Its Properties under Treatment with Inorganic Acid Solutions. Minerals. 2017; 7 (4):49.

Chicago/Turabian Style

Victoria V. Krupskaya; Sergey V. Zakusin; Ekaterina A. Tyupina; Olga V. Dorzhieva; Anatoliy P. Zhukhlistov; Petr E. Belousov; Maria N. Timofeeva. 2017. "Experimental Study of Montmorillonite Structure and Transformation of Its Properties under Treatment with Inorganic Acid Solutions." Minerals 7, no. 4: 49.

Preprint
Published: 19 December 2016
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The paper discusses the mechanism of montmorillonite structure alteration and bentonites properties modification (on the example of samples from clay deposit Taganka, Kazakhstan) due to the thermochemical treatment (treatment with inorganic acid solutions at different temperatures, concentrations and reaction times). With the use of the suit of methods certain processes were distinguished: transformation of montmorillonite structure, which appears in the leaching of interlayer and octahedral cations, protonation of the interlayer and OH groups at octahedral sheets. Changes in the structure of the 2:1 layer of montmorillonite and its interlayer result in significant changes in the properties – reduction of cation exchange capacity and an increase of specific surface area. The results of the work showed that bentonite clays retain a significant portion of its adsorption properties even after the long term and intense thermochemical treatment (6M HNO3, 60°C, 108 hours)

ACS Style

Victoria V. Krupskaya; Sergey V. Zakusin; Ekaterina A. Tyupina; Olga V. Dorzhieva; Anatoliy P. Zhukhlistov; Maria N. Timofeeva; Petr E. Belousov. Experimental Study of Montmorillonite Structure and Transformation of its Properties under the Treatment of Inorganic Acid Solutions. 2016, 1 .

AMA Style

Victoria V. Krupskaya, Sergey V. Zakusin, Ekaterina A. Tyupina, Olga V. Dorzhieva, Anatoliy P. Zhukhlistov, Maria N. Timofeeva, Petr E. Belousov. Experimental Study of Montmorillonite Structure and Transformation of its Properties under the Treatment of Inorganic Acid Solutions. . 2016; ():1.

Chicago/Turabian Style

Victoria V. Krupskaya; Sergey V. Zakusin; Ekaterina A. Tyupina; Olga V. Dorzhieva; Anatoliy P. Zhukhlistov; Maria N. Timofeeva; Petr E. Belousov. 2016. "Experimental Study of Montmorillonite Structure and Transformation of its Properties under the Treatment of Inorganic Acid Solutions." , no. : 1.