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Bentonites from the 10th Khutor deposit (Republic of Khakassia, Russia) are considered a potential buffer material for isolation of radioactive waste in the crystalline rocks of Yeniseyskiy site (Krasnoyarskiy region). This study presents the results of a series of permeameter experiments with bentonite compacted to dry densities of 1.4, 1.6, and 1.8 g/cm3, saturated and permeated by the artificial groundwater from Yeniseyskiy Site. Permeation was conducted at hydraulic gradients of 180–80,000 m/m to simulate potential hydraulic conditions in the early post-closure phase of a deep geological repository (DGR). The respective swelling pressures of 0.8 ± 0.3, 2.2 ± 0.6, and 6.3 ± 0.3 MPa and permeabilities of (27 ± 15) × 10−20, (3.4 ± 0.8) × 10−20, and (0.96 ± 0.26) × 10−20 m2 were observed for the hydraulic gradient of 2000 m/m, which is recommended for the determination of undisturbed swelling pressures and permeabilities in permeameter experiments. Upon incremental increases in the hydraulic gradient, swelling pressures at all densities and permeability at the density of 1.8 g/cm3 remained unchanged, whereas permeabilities at 1.4 and 1.6 g/cm3 decreased overall by a factor of approximately 5 and 1.7, respectively. Seepage-induced consolidation and/or reorganisation of bentonite microstructure are considered possible reasons for these decreases.
Artur Meleshyn; Sergey Zakusin; Victoria Krupskaya. Swelling Pressure and Permeability of Compacted Bentonite from 10th Khutor Deposit (Russia). Minerals 2021, 11, 742 .
AMA StyleArtur Meleshyn, Sergey Zakusin, Victoria Krupskaya. Swelling Pressure and Permeability of Compacted Bentonite from 10th Khutor Deposit (Russia). Minerals. 2021; 11 (7):742.
Chicago/Turabian StyleArtur Meleshyn; Sergey Zakusin; Victoria Krupskaya. 2021. "Swelling Pressure and Permeability of Compacted Bentonite from 10th Khutor Deposit (Russia)." Minerals 11, no. 7: 742.
Nizhne-Koshelevskoe and Verkhne-Pauzhetskoe thermal fields are located in the south of Kamchatka, the first - within the Koshelevsky volcanic massif, the second - on the territory of the Pauzhetsky geothermal field. The first horizon from the surface in these fields is formed by clayey soils, that have been formed as a result of hydrothermal alteration of volcanic rocks. And in the natural conditions clayey soils are at temperatures reaching 100 °C.
Samples of undisturbed clay soils were taken within the thermal fields. The samples are characterized by a density of 1.29 - 1.42 g/cm3, rather high values of the weight moisture (90-110%), and temperatures of 50 - 70 °C.
The samples are dominated by clay minerals: kaolinite and mixed-layer - kaolinite-smectite, their content is about 75%. The other 25% are microcline, cristobalite, anatase, gypsum, pyrite, marcasite, quartz and alunite.
For samples of undisturbed clay soils, direct shear tests were carried out at a temperature of 20 °C and at a temperatures of the samples close to their natural temperatures (50–70 °C). Thus, the values of cohesion and the angle of internal friction of the samples were determined.
The obtained results can be interfered as follows: as a result of an increase in the temperature of clayey soils, the thickness of electric double layer on the surface of clay particles decreases. On the one hand, it leads to a decrease of cohesion value between the clay particles and the beginning of shear deformations at lower vertical loads. On the other hand, a smaller thickness of electric double layer brings particles closer to each other, which is the reason for an increasing angle of internal friction and shear resistance at higher vertical loads.
Ruslan Kuznetsov; Mikhail Chernov; Victoria Krupskaya; Ruslan Khamidov. Influence of temperature on the hydrothermal clay soils' shear strength of the Nizhne-Koshelevsky and Verkhne-Pauzhetsky thermal fields. 2021, 1 .
AMA StyleRuslan Kuznetsov, Mikhail Chernov, Victoria Krupskaya, Ruslan Khamidov. Influence of temperature on the hydrothermal clay soils' shear strength of the Nizhne-Koshelevsky and Verkhne-Pauzhetsky thermal fields. . 2021; ():1.
Chicago/Turabian StyleRuslan Kuznetsov; Mikhail Chernov; Victoria Krupskaya; Ruslan Khamidov. 2021. "Influence of temperature on the hydrothermal clay soils' shear strength of the Nizhne-Koshelevsky and Verkhne-Pauzhetsky thermal fields." , no. : 1.
The sorption of Cu2+ onto bentonite modified with Al Keggin cations and humic acid from CuCl2 solutions at pH 4.5 was studied. Modification of Na-bentonite with Al Keggin cations was found to result in an increase in the basal spacing of montmorillonite from 1.29 nm for N-form to 1.85 and 1.78 nm for HAl13 and Al13 forms respectively, in a reduction of CEC (cation exchange capacity) and in the formation of additional sites with a variable charge with pHPZC 4.2. Al13-bentonite is not affected by heat. Under the conditions of the experiments at pH of 4.5 Na-bentonite adsorbs more Cu2+ from CuCl2 solutions then Al13 forms of bentonites. The main mechanism of copper sorption on Na-bentonite is the cation exchange Cu2+–Na+. The reduction of CEC of Na-bentonite after modification with Al Keggin cations leads to a decrease in the Cu2+ sorption. pH-dependent sorption sites on Al13-bentonites have a pHPZC of 4.2 and, therefore, under conditions of the experiment have positive charge which prevents Cu2+ sorption. Na-bentonite adsorbs more humic acid solution (HA) then Al13-bentonite and the proportion of adsorbed HA remains constant over the entire concentration range. Treatment of the Al13-bentonite with HA leads to the formation of the additional sorption sites. The amount of sorbed Cu2+ and the percentage of their extraction from solutions by HAAl13-bentonite is similar to those values for Na-bentonite.
Yulia Izosimova; Inna Tolpeshta; Irina Gurova; Michail Karpukhin; Sergey Zakusin; Victoria Krupskaya. Sorption of Cu2+ Ions by Bentonite Modified with Al Keggin Cations and Humic Acid in Solutions with pH 4.5. Minerals 2020, 10, 1121 .
AMA StyleYulia Izosimova, Inna Tolpeshta, Irina Gurova, Michail Karpukhin, Sergey Zakusin, Victoria Krupskaya. Sorption of Cu2+ Ions by Bentonite Modified with Al Keggin Cations and Humic Acid in Solutions with pH 4.5. Minerals. 2020; 10 (12):1121.
Chicago/Turabian StyleYulia Izosimova; Inna Tolpeshta; Irina Gurova; Michail Karpukhin; Sergey Zakusin; Victoria Krupskaya. 2020. "Sorption of Cu2+ Ions by Bentonite Modified with Al Keggin Cations and Humic Acid in Solutions with pH 4.5." Minerals 10, no. 12: 1121.
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.
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 StyleVictoria 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 StyleVictoria 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.
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.
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 StylePetr 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 StylePetr 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.
Bentonite clay is an important natural material, widely used in many industries. The purpose of this article is to analyze the mineral resource base of bentonite clays in Russia. The data on reserves of deposits, the degree of their development and production volumes are given. The composition and uses of the main developed deposits of bentonite clay in Russia are characterized. A comparative analysis of the reserves and production growth of bentonite over the past decade is carried out. A brief description of the world situation is given, and the mineral resource base of the CIS countries is considered. Since the quality of raw materials, its properties and reserves directly depend on the conditions of origin, a characteristic of the geological and tectonic position and genesis of the bentonite clay deposits of Russia is given. Bentonite-bearing provinces with favorable conditions for the formation of bentonite deposits with volcanogenic-sedimentary genesis are considered. The most promising regions are proposed for the purposes of expanding the mineral resource base of bentonite materials. This work is the result of the authors’ own geological works at various deposits of bentonite clays in Russia, the near and far abroad, as well as the study and interpretation of published materials on this subject over the past decades.
Petr Belousov; Victoria V. Krupskaya. Bentonite clays of Russia and neighboring countries. Georesursy 2019, 21, 1 .
AMA StylePetr Belousov, Victoria V. Krupskaya. Bentonite clays of Russia and neighboring countries. Georesursy. 2019; 21 (3):1.
Chicago/Turabian StylePetr Belousov; Victoria V. Krupskaya. 2019. "Bentonite clays of Russia and neighboring countries." Georesursy 21, no. 3: 1.
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.
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 StyleV. 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 StyleV. 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.
—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).
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 StyleV. 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 StyleV. 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.
Bentonites are often used as components of engineered barrier systems (EBS) for the radioactive waste disposal and isolation of hazardous nuclear facilities. In this paper, we consider possible transformations of the composition, structure and properties of bentonites when they are used as EBS components during the decommissioning of open pools with liquid radioactive waste (LRW). Operating conditions were modeled by the treatment with nitric acid at different durations (from 1 to 6 h), concentrations (from 1 to 8 M) and temperatures (20and 90°C). Nitric acid was chosen because it is used in the preparation procedure of LRW for isolation. To assess the intensity of transformations, bentonites with a high content of Al- and Fe-rich montmorillonites were selected. The work revealed effects of interlayer modification, leaching of octahedral cations, changes of the grain size distribution, specific surface area and weakening of surface basicity. It was also shown that temperature has a stronger effect on the structural transformation of montmorillonite than acid concentration and treatment duration. Formation of Al hydroxy-interlayered (HI) layers was observed due to the treatment with the nitric acid of lower concentration (1 M). The effect of a higher concentration at the same treatment duration and temperature leads to a more intensive leaching of Al from the octahedral sheets and protonation of the interlayer, which prevents the formation of Al hydroxy-interlayered (HI) layers. CO2 desorption after the nitric acid treatment decreases significantly, maintaining a relatively high value only when the conditions allow the interlayer to be protonated. Modification of structural and adsorption characteristics due to the acid treatment can be used to simulate modification of the engineered barriers' properties for a long-term operation in the disposal of radioactive and toxic wastes.
V. Krupskaya; L. Novikova; Ekaterina Tyupina; Petr Belousov; O. Dorzhieva; S. Zakusin; K. Kim; F. Roessner; E. Badetti; A. Brunelli; L. Belchinskaya. The influence of acid modification on the structure of montmorillonites and surface properties of bentonites. Applied Clay Science 2019, 172, 1 -10.
AMA StyleV. Krupskaya, L. Novikova, Ekaterina Tyupina, Petr Belousov, O. Dorzhieva, S. Zakusin, K. Kim, F. Roessner, E. Badetti, A. Brunelli, L. Belchinskaya. The influence of acid modification on the structure of montmorillonites and surface properties of bentonites. Applied Clay Science. 2019; 172 ():1-10.
Chicago/Turabian StyleV. Krupskaya; L. Novikova; Ekaterina Tyupina; Petr Belousov; O. Dorzhieva; S. Zakusin; K. Kim; F. Roessner; E. Badetti; A. Brunelli; L. Belchinskaya. 2019. "The influence of acid modification on the structure of montmorillonites and surface properties of bentonites." Applied Clay Science 172, no. : 1-10.
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).
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 StyleVictoria 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 StyleVictoria 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.
Parveen K. Verma; Anna Yu. Romanchuk; Irina E. Vlasova; Victoria V. Krupskaya; Sergey V. Zakusin; Alexey V. Sobolev; Alexander V. Egorov; Prasanta K. Mohapatra; Stepan N. Kalmykov. Np(V) uptake by bentonite clay: Effect of accessory Fe oxides/hydroxides on sorption and speciation. Applied Geochemistry 2017, 78, 74 -82.
AMA StyleParveen K. Verma, Anna Yu. Romanchuk, Irina E. Vlasova, Victoria V. Krupskaya, Sergey V. Zakusin, Alexey V. Sobolev, Alexander V. Egorov, Prasanta K. Mohapatra, Stepan N. Kalmykov. Np(V) uptake by bentonite clay: Effect of accessory Fe oxides/hydroxides on sorption and speciation. Applied Geochemistry. 2017; 78 ():74-82.
Chicago/Turabian StyleParveen K. Verma; Anna Yu. Romanchuk; Irina E. Vlasova; Victoria V. Krupskaya; Sergey V. Zakusin; Alexey V. Sobolev; Alexander V. Egorov; Prasanta K. Mohapatra; Stepan N. Kalmykov. 2017. "Np(V) uptake by bentonite clay: Effect of accessory Fe oxides/hydroxides on sorption and speciation." Applied Geochemistry 78, no. : 74-82.
We have analyzed the specific features of the mineralogical composition of bottom sediments of Blagopoluchiya, Tsivol’ki, and Abrosimov bays and soils on Cape Zhelaniya and the coasts of Abrosimov and Stepovoi bays. The data were obtained during two scientific expeditions of the R/V Professor Shtokman in 2014 (cruise 128) and R/V Akademik Mstislav Keldysh in 2015 (cruise 63). These investigations revealed patterns in the transportation of terrigenous material in the coastal zone of the bays: a decrease in the share of nonclay minerals and an increase in that of clay minerals with distance from shore. The increase in kaolinite and smectite content in soil horizons is related to biochemical weathering, while illite is mainly formed as a result of physical weathering.
V. V. Krupskaya; A. Yu. Miroshnikov; O. V. Dorzhieva; S. V. Zakusin; I. N. Semenkov; A. A. Usacheva. Mineral composition of soils and bottom sediments in bays of Novaya Zemlya. Oceanology 2017, 57, 215 -221.
AMA StyleV. V. Krupskaya, A. Yu. Miroshnikov, O. V. Dorzhieva, S. V. Zakusin, I. N. Semenkov, A. A. Usacheva. Mineral composition of soils and bottom sediments in bays of Novaya Zemlya. Oceanology. 2017; 57 (1):215-221.
Chicago/Turabian StyleV. V. Krupskaya; A. Yu. Miroshnikov; O. V. Dorzhieva; S. V. Zakusin; I. N. Semenkov; A. A. Usacheva. 2017. "Mineral composition of soils and bottom sediments in bays of Novaya Zemlya." Oceanology 57, no. 1: 215-221.
The article is dedicated to the study of mineral composition and genesis of Desiatiy Khutor deposit of bentonite clays located in the Republic of Khakasia. The mineral composition of natural samples and fraction Keywords bentonite clay, mineral composition, montomorillonite, 10th Khutor deposit, x-ray diffraction, cation exchange capacity, specific surface area.
Petr Evgenievich Belousov; Viktoria Valerievna Krupskaya; Sergey Viacheslavovich Zakusin; Vasilii Valerievich Zhigarev. BENTONITE CLAYS FROM 10TH KHUTOR DEPOSITE: FEATURES OF GENESIS, COMPOSITION AND ADSORPTION PROPERTIES. RUDN Journal of Engineering Researches 2017, 18, 135 -143.
AMA StylePetr Evgenievich Belousov, Viktoria Valerievna Krupskaya, Sergey Viacheslavovich Zakusin, Vasilii Valerievich Zhigarev. BENTONITE CLAYS FROM 10TH KHUTOR DEPOSITE: FEATURES OF GENESIS, COMPOSITION AND ADSORPTION PROPERTIES. RUDN Journal of Engineering Researches. 2017; 18 (1):135-143.
Chicago/Turabian StylePetr Evgenievich Belousov; Viktoria Valerievna Krupskaya; Sergey Viacheslavovich Zakusin; Vasilii Valerievich Zhigarev. 2017. "BENTONITE CLAYS FROM 10TH KHUTOR DEPOSITE: FEATURES OF GENESIS, COMPOSITION AND ADSORPTION PROPERTIES." RUDN Journal of Engineering Researches 18, no. 1: 135-143.
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)
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 StyleVictoria 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 StyleVictoria 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.
The aim of this study was to investigate the correlation between the basic and catalytic properties of brucite and Mg,Al-layered double hydroxides (Mg,Al-LDHs) in the reaction of propylene oxide with methanol. The basic properties of the solids were investigated by FT-IR spectroscopy using CDCl3 as probe molecule and Hammett acidity titration with n-butylamine and benzoic acid. Both the increase in the activation temperature and the decrease in Al content favored the increase in the basicity of Mg,Al-LDH. The nature of “Mn+–O2− Lewis acid-base” pairs was a key factor to control the catalytic behavior of the solids. The length of the M-O bond, the basicity of the oxygen ion and the strength of the metal ion on the surface affected the catalytic activity of the solids and their isomer selectivity in the reaction between methanol and propylene oxide to form 1-methoxy-2-propanol. It was demonstrated that brucite(150) can be applied as catalyst for at least four successive cycles without loss of activity.
Maria N. Timofeeva; Aleksey E. Kapustin; Valentina N. Panchenko; Eleonora O. Butenko; Victoria V. Krupskaya; Antonio Gil; Miguel A. Vicente. Synthetic and natural materials with the brucite-like layers as high active catalyst for synthesis of 1-methoxy-2-propanol from methanol and propylene oxide. Journal of Molecular Catalysis A: Chemical 2016, 423, 22 -30.
AMA StyleMaria N. Timofeeva, Aleksey E. Kapustin, Valentina N. Panchenko, Eleonora O. Butenko, Victoria V. Krupskaya, Antonio Gil, Miguel A. Vicente. Synthetic and natural materials with the brucite-like layers as high active catalyst for synthesis of 1-methoxy-2-propanol from methanol and propylene oxide. Journal of Molecular Catalysis A: Chemical. 2016; 423 ():22-30.
Chicago/Turabian StyleMaria N. Timofeeva; Aleksey E. Kapustin; Valentina N. Panchenko; Eleonora O. Butenko; Victoria V. Krupskaya; Antonio Gil; Miguel A. Vicente. 2016. "Synthetic and natural materials with the brucite-like layers as high active catalyst for synthesis of 1-methoxy-2-propanol from methanol and propylene oxide." Journal of Molecular Catalysis A: Chemical 423, no. : 22-30.
Maria N. Timofeeva; Valentina N. Panchenko; Antonio Gil; Sergey V. Zakusin; Victoria V. Krupskaya; Konstantin Volcho; Miguel Angel Vicente. Effect of structure and acidity of acid modified clay materials on synthesis of octahydro-2H-chromen-4-ol from vanillin and isopulegol. Catalysis Communications 2015, 69, 234 -238.
AMA StyleMaria N. Timofeeva, Valentina N. Panchenko, Antonio Gil, Sergey V. Zakusin, Victoria V. Krupskaya, Konstantin Volcho, Miguel Angel Vicente. Effect of structure and acidity of acid modified clay materials on synthesis of octahydro-2H-chromen-4-ol from vanillin and isopulegol. Catalysis Communications. 2015; 69 ():234-238.
Chicago/Turabian StyleMaria N. Timofeeva; Valentina N. Panchenko; Antonio Gil; Sergey V. Zakusin; Victoria V. Krupskaya; Konstantin Volcho; Miguel Angel Vicente. 2015. "Effect of structure and acidity of acid modified clay materials on synthesis of octahydro-2H-chromen-4-ol from vanillin and isopulegol." Catalysis Communications 69, no. : 234-238.
Filtration-capacity properties of terrigenous reservoir rocks significantly depend on catagenetic transformations of clay minerals. Results of our research revealed the authigenic nature and formation stages of kaolinite and chlorite. The volume and shape of pore space define the morphology of clay particles. Depending on the pore volume, kaolinite crystallizes either as thick tabular aggregates or as fan-shaped intergrowths. The formation of authigenic clays in pores of terrigenous reservoirs decreases filtration-capacity properties of rocks with low permeability and, conversely, increases filtration-capacity properties of rocks with high primary permeability and large pore volume.
V. V. Krupskaya; Georgy Kalmykov; O. V. Khotylev; M. Yu. Revva. Influence of processes of the formation of authigenic clay minerals of terrigenous rocks on reservoir properties: Evidence from the rocks of the Vartov Arch. Lithology and Mineral Resources 2006, 41, 222 -229.
AMA StyleV. V. Krupskaya, Georgy Kalmykov, O. V. Khotylev, M. Yu. Revva. Influence of processes of the formation of authigenic clay minerals of terrigenous rocks on reservoir properties: Evidence from the rocks of the Vartov Arch. Lithology and Mineral Resources. 2006; 41 (3):222-229.
Chicago/Turabian StyleV. V. Krupskaya; Georgy Kalmykov; O. V. Khotylev; M. Yu. Revva. 2006. "Influence of processes of the formation of authigenic clay minerals of terrigenous rocks on reservoir properties: Evidence from the rocks of the Vartov Arch." Lithology and Mineral Resources 41, no. 3: 222-229.
V. V. Krupskaya; I. A. Andreeva; E. I. Sergeeva. Clay Minerals in Bottom Sediments of the Medvezhii Island Region, Norwegian Sea. Lithology and Mineral Resources 2004, 39, 31 -40.
AMA StyleV. V. Krupskaya, I. A. Andreeva, E. I. Sergeeva. Clay Minerals in Bottom Sediments of the Medvezhii Island Region, Norwegian Sea. Lithology and Mineral Resources. 2004; 39 (1):31-40.
Chicago/Turabian StyleV. V. Krupskaya; I. A. Andreeva; E. I. Sergeeva. 2004. "Clay Minerals in Bottom Sediments of the Medvezhii Island Region, Norwegian Sea." Lithology and Mineral Resources 39, no. 1: 31-40.