Effect of grain size on the sorption and desorption of 137Cs in crushed granite columns and groundwater system under dynamic conditions

Ştamberg, K.; Palágyi, Š.

doi:10.1007/s10967-012-1626-0

Cited by 11 publications

(3 citation statements)

References 15 publications

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“…For calculation of (A relS ) theor , the Equation (22) can be used directly until (A relS ) theor ≤ 0.5, i.e., until ( (R S ) theor – n PVS ) ≥ 0. For calculation of (A relS ) theor > 0.5, i.e., if ( (R S ) theor − n PVS ) < 0, the Equation (23) should be used, which was derived from Equation (22) (because it holds: erfc (−x) = 2 – erfc (x) ) [ 28 ].…”

Section: Methodsmentioning

confidence: 99%

Surface Complexation Models of Pertechnetate on Biochar/Montmorillonite Composite—Batch and Dynamic Sorption Study

et al. 2020

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The study summarizes the results of monitoring the properties of two types of sorbents, BC1 (biochar sample 1) and BC2a (biochar sample 2), prepared by pyrolysis of bamboo biomass (BC1) and as its composite with montmorillonite K10 (BC2a). The main goal was to study their applicability to the Tc (VII) separation from liquid wastes, using NH4ReO4 as a carrier. The research was focused on determining the sorbents surface properties (by XRF (X-ray fluorescence) method and potentiometric titration in order to determine the properties of surface groups—Chemical Equilibrium Model (CEM) and Ion Exchange Model (IExM) models were applied here). As well as monitoring Tc (VII) (+Re(VII)) sorption, especially to determine equilibrium isotherm, the influence of pH and kinetics. The subject of research was also the dynamics of sorption, including its mathematical–physical modeling. Both sorbents have good properties against Tc (VII), however BC2a, due to the presence of montmorillonite, is more advantageous in this respect. It has a higher sorption capacity and faster kinetic investigation. An important finding is that the optimal pH is 2–3, which is related not only to the protonation of surface groups (they have a positive charge), but also to the negative form of the existence of Tc (VII) and Re (VII): TcO4− and ReO4−.

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Section: Methodsmentioning

confidence: 99%

Surface Complexation Models of Pertechnetate on Biochar/Montmorillonite Composite—Batch and Dynamic Sorption Study

et al. 2020

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“…Its composition is in Table 3 [14]. The experimental setup and procedure of the experiments can be found in [16, 17]. The initial activity and flow-rate about 0.05 cm 3 /min of SGW through the columns were constant during the sorption process.…”

Section: Methodsmentioning

confidence: 99%

“…[13]. There are also such models at hand [14–17] making possible to describe the interaction characterized not only with linear, but also with non-linear isotherm equation, i.e., if the retardation and distribution coefficients are function of investigated component concentration—of course, it is rarely a case of the non-interacting tracers type of HTO and 36 Cl − .…”

Section: Introductionmentioning

confidence: 99%

Interaction of 3H+ (as HTO) and 36Cl− (as Na36Cl) with crushed granite and corresponding fracture infill material investigated in column experiments

Ştamberg

Palágyi

Videnská

et al. 2013

J Radioanal Nucl Chem

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The transport of 3H+ (as HTO) and 36Cl− (as Na36Cl) was investigated in the dynamic system, i.e., in the columns filled with crushed pure granite and fracture infill of various grain sizes. The aim of column experiments was to determine important transport parameter, such as the retardation, respectively distribution coefficients, Peclet numbers and hydrodynamic dispersion coefficients. Furthermore, the research was focused to quantification of the effect of grain size on migration of studied radionuclides. The experimental breakthrough curves were fitted by a model based on the erfc-function, assuming a linear reversible equilibrium sorption/desorption isotherm, and the above mentioned transport parameters were determined. The results showed that influence of grain size on sorption of 3H+ and 36Cl− was negligible. Retardation and distribution coefficients of both tracers converged to one and zero, respectively, in case of all fractions of crushed granite and infill material. Generally, the presumed ion exclusion of 36Cl in anionic form was proved under given conditions, only very weak one seems to exist in a case of infill material. In principal, both radionuclides behaved as non-sorbing, conservative tracers. On the other hand, the influence of grain size on Peclet numbers value and on dispersion coefficient was observed for both crystalline materials, namely in agreement with theoretical suppositions that the values of Peclet numbers decrease with increasing grain size and values of dispersion coefficient increase.

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Effect of grain size on the 85Sr2+ sorption and desorption in columns of crushed granite and infill materials from granitic water under dynamic conditions

Palágyi

Ştamberg

Havlová

et al. 2012

J Radioanal Nucl Chem

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Effect of grain size on the sorption and desorption of 137Cs in crushed granite columns and groundwater system under dynamic conditions

Cited by 11 publications

References 15 publications

Surface Complexation Models of Pertechnetate on Biochar/Montmorillonite Composite—Batch and Dynamic Sorption Study

Surface Complexation Models of Pertechnetate on Biochar/Montmorillonite Composite—Batch and Dynamic Sorption Study

Interaction of 3H+ (as HTO) and 36Cl− (as Na36Cl) with crushed granite and corresponding fracture infill material investigated in column experiments

Effect of grain size on the 85Sr2+ sorption and desorption in columns of crushed granite and infill materials from granitic water under dynamic conditions

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