Diffusion of na and cs in montmorillonite

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WebDec 30, 2024 · Tachi Y, Yotsuji K (2014) Diffusion and sorption of Cs +, Na +, I-, and HTO in compacted sodium montmorillonite as a function of porewater salinity: Integrated sorption and diffusion model. Geochim Cosmochim Acta 132:75–93. ... Kasar S, Kumar S, Bajpai RK, Tomar BS (2016) Diffusion of Na(I), Cs(I), Sr(II) and Eu(III) in smectite rich … WebIn the present study, the diffusion and retention behaviour of Cs in compacted montmorillonite con-taining illite was investigated by through-diffusion experiments. …

Ca/Na montmorillonite: structure, forces and swelling properties.

WebJul 20, 2024 · The result showed that calculated activation energies for ion and water diffusion in Na-montmorillonite were similar to each other and to the water hydrogen bond energy, suggesting the breaking of water–water and water-clay hydrogen bonds as a likely mechanism for interlayer diffusion [ 3 ]. WebMay 1, 2014 · The diffusion and sorption behaviors of cationic Cs⁺ and Na⁺, anionic I⁻ and neutral tritiated water (HTO) tracers in compacted montmorillonite were investigated as a function of porewater... greeneville tn election results

Swelling of Montmorillonite in Polar Organic Liquids

WebJun 1, 2006 · Our model predicts, in agreement with experiment, that the mean principal value of the apparent diffusion coefficient tensor follows a single relationship when plotted against the partial montmorillonite dry density (mass of montmorillonite per combined volume of montmorillonite and pore space). WebApr 1, 2008 · An analysis of the relative diffusion coefficients (the ratio between the diffusion coefficient of an ion in the interlayer and its diffusion coefficient in bulk water) revealed that water and Na + are always less retarded than Cs +. With large interlayer … WebThe effect of temperature in the range of 0–150 °C was studied for homoionic montmorillonite clays with Na + and Cs + compensating ions in low hydration states. … fluidmaster better than wax bolts impossible

Diffusion mechanism of cesium ions in compacted

Study of individual Na-montmorillonite particles size, …

WebAug 1, 2004 · Diffusion coefficients of water and ions as a function of temperature are summarized in Fig. 2, while trajectories of Na + and Cs + ions in the monohydrated … WebJan 24, 2003 · Abstract. To simulate the diffusion of a tracer Cs + in very compacted bentonites, the interlayer spaces of two bihydrated Na-montmorillonites containing a … fluidmaster 7530 seal installation videoWebDiffusion and sorption of cesium (Cs) and iodine (I) were investigated in a purified and moderately compacted sodium montmorillonite (dry density of 800 kg m-3) saturated with 0.01, 0.1 and 0.5M NaCl solutions.The effective diffusivity (D e) and capacity factor (α) for Cs and I were measured by through-diffusion experiments, coupled with multiple curve … fluidmaster 7500p8 wax free bowl gasket

"WebJun 11, 2024 · Chang, F.-R.C et al have published the self-diffusion coefficient of Li + [6] , Na + [5] , K + [7] and water in hydrated montmorillonite. Sutton et al. [8] have presented the transport of Cs + and Open Advanced Search " - Diffusion of na and cs in montmorillonite

Diffusion of na and cs in montmorillonite

Ca/Na montmorillonite: structure, forces and swelling properties.

WebMay 1, 2005 · Size, morphology, and apparent charge of individual Na-montmorillonite particles of natural MX-80 sodium montmorillonite were investigated in the present study by the use of three coupling methods.

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WebThe Fe released from Fe (III)-Mt during the Cs (I) sorption was found to be not more than 0.2 ppm. However, on lowering the pH and increasing the ionic strength, the Fe release increased. Furthermore, the apparent diffusion coefficient for … WebJan 1, 1998 · Activation energies lower than that for the diffusion of sodium ions in free water were found for montmorillonite specimens with dry densities of {le} 1.2 Mg/m {sup 3}, while higher activation energies were observed at dry densities {ge} 1.4 Mg/m {sup 3}.

WebThe effect of temperature in the range of 0–150 °C was studied for homoionic montmorillonite clays with Na + and Cs + compensating ions in low hydration states. Both static and dynamic information concerning the interlayer ions and water molecules was obtained by Monte Carlo and molecular dynamics. Principal structural changes were … WebJan 2, 2024 · In such an environment, montmorillonite in compacted bentonite might be altered to illite due to the hydrothermal reactions caused by the decay heat of …

WebSep 1, 1999 · It has also been reported that the activation energy for diffusion of Cs + ions in Na-montmorillonite increased from 34 to 53 kJ mol −1 (Kozaki et al., 1996) and that … WebApr 1, 2010 · The cation exchange capacity was 4.624 meq·g −1 , and the maximum adsorption rate of Cs + was 64.1%. Galambo et al. [34] used bentonite and montmorillonite to adsorb 137 Cs in radioactive...

WebFeb 1, 2007 · The translational diffusion of water in compacted clays at a high hydration level has been investigated by quasielastic neutron scattering at a time-of-flight spectrometer FOCUS (SINQ). Four...

WebNa-Montmorillonit zeigt osmotische Quellung (Entwicklung einer diffusen Doppelschicht — d (001) ≫ 19 Å) in Formamid und N -Methylformamid und Cs ergibt osmotisches Quellungsverhalten in Formamid. Cs-Montmorillonit weist im Bereich der kristallinen Quellung mit allen Flüssigkeiten Schichtabstände auf, die größer als die mit Wasser … fluidmaster better than wax ratedWebMar 11, 2015 · This paper reports on a detailed the progress of the interlamellar water amount as a function of the relative humidity rates in the case of two dioctahedral smectites saturated by Cs + and Na + cations along the shrinking–rewetting cycle. greeneville tn electrical supplyWebadshelp[at]cfa.harvard.edu The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A fluidmaster better than wax reviewsWebOct 1, 2010 · The recently developed CLAYFF force field is used to predict the basal spacing as a function of the water content in the interlayer. The simulations reproduced the swelling pattern of these montmorillonites, suggesting a mechanism of their hydration different (K + < Na + < Ca 2+) from that of K +-, Na +-, and Ca 2+-montmorillonites. In ... fluidmaster better than wax ringWebThe microcalorimetric investigation of the system composed of a homoionic Na-montmorillonite extracted from ANDRA MX80 bentonite and CsCl in aqueous solution … greeneville tn federal courtWebJan 1, 2004 · The values for the relative diffusion coefficients of Cs + extracted from our simulations are smaller than those obtained in previous studies (Marry and Turq, 2003;Bourg, 2004), but they are... greeneville tn electric companyWebNov 1, 2011 · The diffusion s imulation resu lts of Li-, Na-, K-, Cs-MMT, based on NVE ense mble and SPC/E water model, com pared well to availa ble experimenta l quantities an d previous simulati ons, which ... fluidmaster better than wax toilet seal video