Diffusion of na and cs in montmorillonite

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WebNov 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 ... WebDiffusion 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 …

Diffusion of Na and Cs in montmorillonite - NASA/ADS

WebThe microcalorimetric investigation of the system composed of a homoionic Na-montmorillonite extracted from ANDRA MX80 bentonite and CsCl in aqueous solution … WebThe state and dynamics of water and cations in pure and mixed Na-Cs-montmorillonite as a function of the interlayer water content were investigated in the present study, using … sts vedonlyönti

Translational diffusion of water in compacted clay systems

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 … WebThe state and dynamics of water and cations in pure and mixed Na-Cs-montmorillonite as a function of the interlayer water content were investigated in the present study, using … 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 sts versions download

The water retention mechanism of a Cs - Cambridge Core

SWELLING BEHAVIOR OF Na- AND Ca-MONTMORILLONITE UP TO 150°C BY …

WebJan 15, 2007 · The diffusion of 22Na and 85Sr in highly compacted montmorillonite and kaolinite is investigated as a function of the "external salt concentration" (NaClO4), i.e., of the solution in equilibrium with the clay. Consistent results were obtained from through-diffusion experiments and tracer profile analysis. 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 … sts vcruntimeWebJun 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). sts ventures inc

"WebMar 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. " - Diffusion of na and cs in montmorillonite

Diffusion of na and cs in montmorillonite

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 … 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...

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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 … WebOct 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 ...

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 …

WebApr 1, 2008 · The state and dynamics of water and cations in pure and mixed Na-Cs-montmorillonite as a function of the interlayer water … 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.

Webof surface diffusion of Cs sorbed on illite contained in compacted montmorillonite was discussed. EXPERIMENTAL METHODS Materials KunipiaF(suppliedbyKunimineIndustryCo.Ltd., Japan), a commercially produced Na-montmorillonite purified from a crude bentonite Kunigel V1, was used as the sample …

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 … sts vehicle inspectionsWebJan 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}. sts verification internationalWebionic (mixed Na-Cs) montmorillonite as a function of water content and resulting interlayer spacing, and to determine the dependence of diffusion coefficients of Na+ and Cs+ on … sts vehicle movementWebApr 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... sts walesWebDec 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 … sts volodymyr and olha ukWebIn the present study, the diffusion and retention behaviour of Cs in compacted montmorillonite con-taining illite was investigated by through-diffusion experiments. … sts virtual school loginWebThe 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 … sts volodymyr and olga cathedral winnipeg