A theoretical description of diffusion and migration of 137Cs in soil

Likar, A.; Omahen, Gregor; Lipoglavšek, M.; Vidmar, T.

doi:10.1016/s0265-931x(01)00019-4

Cited by 29 publications

(21 citation statements)

References 6 publications

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“…5, differences in the 137 Cs activity profiles have been detected. In general, the profiles of SP1, SP2 and SP3 seem to be typical of convectiveediffusive processes (Likar et al, 2001;Bossew and Kirchner, 2004). However, SP2 profile is slightly different.…”

Section: Vertical Migrationmentioning

confidence: 84%

“…Two approaches for modeling the migration of radionuclides in soils have been used, the convectionedispersion equation (ODCDE) with constant parameters, known as the FokkerePlanck equation (Likar et al, 2001;Bossew and Kirchner, 2004) and the serial compartmental model (Kirchner, 1998;Schuller et al, 1997). The ODCDE approach is the most used model to estimate the 137 Cs transport parameters.…”

Section: Introductionmentioning

confidence: 99%

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Inventories and concentration profiles of 137Cs in undisturbed soils in the northeast of Buenos Aires Province, Argentina

Montes

Silva²,

Sa³

et al. 2013

Journal of Environmental Radioactivity

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Cs concentration profiles were attributed to soil properties, especially the clay content and the pH values.A convectionedispersion model with irreversible retention was used to fit the activity concentration profiles. The obtained effective diffusion coefficient and effective convection velocity parameters values were in the range from 0.2 cm 2 /y to 0.4 cm 2 /y and from 0.23 cm/y to 0.43 cm/y, respectively. These data are in agreement with values reported in literature. In general, with the growth of clay content in the soil, there was an increase in the transfer rate from free to bound state. Finally, the highest transfer rate from free to bound state was obtained for soil pH value equal to 8.

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Section: Vertical Migrationmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Inventories and concentration profiles of 137Cs in undisturbed soils in the northeast of Buenos Aires Province, Argentina

Montes

Silva²,

Sa³

et al. 2013

Journal of Environmental Radioactivity

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show abstract

“…For constant values of D and V and local equilibrium conditions, total 137 Cs concentration (sorbed and mobile) could be derived from the solution of the following integral (Konshin, 1992;Schuller et al, 1997;Likar et al, 2001;Bossew and Kirchner, 2004):…”

Section: Transport Parametersmentioning

confidence: 99%

“…Several models have been developed to describe 137 Cs migration in soils and to explain its vertical distribution. Among them, many analytical solutions of the convectiondispersion equation (CDE) which are different in initial and/or boundary conditions and physicochemical processes have been proposed (Ivanov et al, 1997;Konshin, 1992;Likar et al, 2001;Smith and Elder, 1999;Schuller et al, 1997;Szerbin et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Vertical migration of¹³⁷Cs in the South Caspian soil

Vahabi-Moghaddam

Khoshbinfar

2012

Radioprotection

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In order to study the vertical migration of anthropogenic 137 Cs, soil inventories of this radionuclide were measured in two regions selected on the basis of a previous comprehensive survey in the northern Iranian province of Guilan located in the South Caspian region. Ten sampling stations were randomly chosen in these regions and split-level sampling was carried out to a depth of 30 cm. Sample analysis was performed using a HPGe detector system. In situ gamma measurements in both regions were also carried out with the aid of a portable germanium spectrometer. The experimental data were then compared with the solution of the convectiondispersion equation (

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“…The multicompartment model (Kirchner 1998, Likar et al 2001 assumes that the soil depth is split into a series of N horizontal layers which are connected by a downward transport rates of the particular radionuclide being investigated. In this case, the transfer of activity Ai(Bqm -2 ) of a particular radionuclide in the compartment i in a small time interval dt can be mathematically expressed as:…”

Section: Theory Of the Compartment Modelmentioning

confidence: 99%

Residence half-times of 137Cs in undisturbed surface soil in Nigeria based on measured soil concentration profiles.

Ajayi¹

2010

MAS

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The transport of fallout 137 Cs within the Nigerian soil has been studied in this paper by a compartment model. The measured concentrations of the radionuclide in the soil layers were examined by the model in order to estimate the transport parameters of residence half-time and the migration velocity of the radionuclide in the soils. The residence half-times were observed to be short and decreased with soil depth with a mean ranging from 0.3 years at 0 -2cm soil depth in Akure site to 1.4 years at 10-15cm depth in Igbeti site. The migration velocity ν , calculated from the residence times with the consideration of the different thicknesses of the layers were observed to decrease slowly with depth at all the sampling sites with a range from 3.62 cm y -1 at Igbeti site to 8.21 cm.y -1 at Ikogosi site. The migration velocities obtained are quite higher than those reported in literature for global fallout.

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A theoretical description of diffusion and migration of 137Cs in soil

Cited by 29 publications

References 6 publications

Inventories and concentration profiles of 137Cs in undisturbed soils in the northeast of Buenos Aires Province, Argentina

Inventories and concentration profiles of 137Cs in undisturbed soils in the northeast of Buenos Aires Province, Argentina

Vertical migration of¹³⁷Cs in the South Caspian soil

Residence half-times of 137Cs in undisturbed surface soil in Nigeria based on measured soil concentration profiles.

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A theoretical description of diffusion and migration of 137Cs in soil

Cited by 29 publications

References 6 publications

Inventories and concentration profiles of 137Cs in undisturbed soils in the northeast of Buenos Aires Province, Argentina

Inventories and concentration profiles of 137Cs in undisturbed soils in the northeast of Buenos Aires Province, Argentina

Vertical migration of137Cs in the South Caspian soil

Residence half-times of 137Cs in undisturbed surface soil in Nigeria based on measured soil concentration profiles.

Contact Info

Product

Resources

About

Vertical migration of¹³⁷Cs in the South Caspian soil