Adsorption of nuclides on mixtures of minerals

Palmer, Donald A.; Shiao, S.Y.; Meyer, Robert E.; Wethington, J.A.

doi:10.1016/0022-1902(81)80109-1

Cited by 29 publications

(16 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, the additivity rule is not directly applicable to the estimation of the distribution ratios for the sandy soils, but is applicable for the synthetic soil which consists of more than two different components. shown that the additivity rule is applicable to the estimation of a distribution ratio for a synthetic mixture of two different components [14]. In the present study it is shown that the additivity rule is applicable to estimate a distribution ratio for a synthetic mixture of more than two different components.…”

Section: Estimation Of Sorption Behavior Of Strontium On Sandy Soilsmentioning

confidence: 92%

“…Although many researchers have studied the sorption behavior of radioactive strontium on soil [3][4][5][6][7][8][9][10][11][12][13][14][15], only a few reports have focused on the above question. Torstenfelt et al showed that the distribution ratios of strontium and cesium for granite did not coincide with those estimated from its components [7], In contrast, Palmer et al suggested that the distribution ratio of strontium for a mixture of clay minerals was expressed by the linear combination of the ratios for the individual clay minerals (additivity rule) [14], If the content of minerals and metal oxides and/or hydroxides in soils is known, the above question can be elucidated by sorption experiments of strontium on soils and their individual components. However, it is difficult in practice to separate soil components individually.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Sorption Characteristics of Strontium on Sandy Soils and Their Components

Ohnuki

1994

Radiochimica Acta

View full text Add to dashboard Cite

The sorption behavior of strontium on sandy soils and the reference minerals of the soil components have been studied by sorption and desorption experiments. The observed fractions of strontium sorbed on and desorbed from the sandy soils and the reference minerals with a 0.1 Μ LiCl solution have revealed that the additivity rule cannot be directly applied to predict the sorption behavior of strontium on sandy soils. Instead, the distribution ratio (Kd s ) of strontium for sandy soils is found to be expressed by the following equation: Kd s = a^Kdl • ρ,,where Kd', and p, are the distribution ratio for a reference mineral of the i-th soil component and the content of the i'-th soil component, respectively, and a is the ratio of a measured cation exchange capacity (CEC) of a sandy soil to that estimated on the basis of CECs of the reference minerals. The equation indicates that the CECs are important for predicting the sorption characteristics of strontium on sandy soils.

show abstract

Section: Estimation Of Sorption Behavior Of Strontium On Sandy Soilsmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Sorption Characteristics of Strontium on Sandy Soils and Their Components

Ohnuki

1994

Radiochimica Acta

View full text Add to dashboard Cite

show abstract

“…Assuming that the various components of a mixture are non-interacting, the measured K d value for the mixture is equal to the weighted sum of the distribution coefficients of each component, as given by [2,16]:…”

Section: Relationship Between Quantitative Mineralogy and Cesium Sorpmentioning

confidence: 99%

Relationship of quantitative X-ray diffraction measurements of geologic materials to cesium sorption

Payne¹,

Bertram²,

Itakura³

et al. 2002

Radiochimica Acta

View full text Add to dashboard Cite

Quantitative XRD / Rietveld analysis / Cesium / Sorption / Illite / SmectiteSummary. The amounts of clay minerals in geologic samples from the Australian arid zone were measured using the SIROQUANT program, which quantifies mineral abundances from X-ray diffraction patterns using the Rietveld method. The sorption of trace cesium on the same samples was investigated in batch experiments. The statistical relationships between the Cs distribution coefficients (K d values) and the smectite, illite and kaolinite contents were assessed. Other characterisation data such as the BET surface area and total clay content were included in the statistical analysis. The correlation of the illite content with the K d for trace Cs was stronger than any other correlation that was tested. This can be attributed to the presence of frayed edge sites on illite which are highly selective for the adsorption of trace Cs. Sorption experiments were also carried out with higher Cs concentrations, which were expected to saturate the selective Cs sorption sites on illite. Under these conditions, there was no significant correlation between the illite content and the cesium K d . However, the K d was related to the smectite content of the materials. There was no correlation between the kaolinite content and the K d for Cs sorption under any of the experimental conditions. The sorption of Cs on the samples was influenced by the BET surface areas, but normalisation of the K d data by surface area did not fully explain the sorption results. Only the quantitative XRD data were able to explain the shapes of Cs sorption isotherms. The isotherm was distinctly different for an illite-rich sample and did not conform to the Freundlich isotherm exhibited by other samples. This study demonstrates that quantitative XRD measurements are valuable in predicting Cs sorption properties of complex geologic samples, particularly sorption data obtained with trace Cs levels where bulk measurements such as the BET surface area are less useful.

show abstract

“…The sorption behavior of radionuclides is af fected by experimental conditions, i.e., concentra tion of coexistent cations (Tsutsui and Nishimaki, 1975), pH of solution (Zagorka et al, 1961), grain size of soil (Tanaka and Yamamoto, 1988) and soil constituents (Palmer et al, 1981). It has been also studied on influence of the ratio between soil weight and solution volume, which is hereinafter called soil/solution ratio, on the adsorption be havior of radionuclides.…”

Section: Introductionmentioning

confidence: 99%

Influence of soil/solution ratio on adsorption behavior of cesium on soils.

Tanaka

Ohnuki

1994

Geochem. J.

View full text Add to dashboard Cite

The influence of the ratio between soil weight and solution volume (soil/solution ratio) on a distribution coefficient of cesium for coastal sandy soil, kaoline and silica sand to water has been studied. The distri bution coefficients of 137Cs for the soils decreased with the increase of the soil/solution ratios. The con centration of the cations dissolved from the soils into the solution varied with the soil/solution ratio. However, when the concentration of coexistent cations kept to be 10-2 mol/l, the distribution coefficient was kept constant at different soil/solution ratios. These results show that the soil/solution ratio does not directly affect on the adsorption of 137Cs on the soils, but the variation in the concentration of dissolved cations with the soil/solution ratio results in the change in the distribution coefficient.

show abstract

Adsorption of nuclides on mixtures of minerals

Cited by 29 publications

References 6 publications

Sorption Characteristics of Strontium on Sandy Soils and Their Components

Sorption Characteristics of Strontium on Sandy Soils and Their Components

Relationship of quantitative X-ray diffraction measurements of geologic materials to cesium sorption

Influence of soil/solution ratio on adsorption behavior of cesium on soils.

Contact Info

Product

Resources

About