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

Inventories and vertical distribution of 137Cs were determined in La Plata region undisturbed soils, Argentina. A mean inventory value of 891 ± 220 Bq/m2 was established, which is compatible with the values expected from atmospheric weapon tests fallout. The study was complemented with pH, organic c...

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Autores principales: Montes, María Luciana, Silva, Luís M. S., Sá, C.S.A., Runco, Jorge, Taylor, Marcela Andrea, Desimoni, Judith
Formato: Articulo
Lenguaje:Inglés
Publicado: 2012
Materias:
Física
Ciencias Exactas
137Cs
Soil
Inventory
Vertical distribution
Convection
dispersion
fixation approach
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/128845
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-128845
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Ciencias Exactas
137Cs
Soil
Inventory
Vertical distribution
Convection
dispersion
fixation approach
spellingShingle Física
Ciencias Exactas
137Cs
Soil
Inventory
Vertical distribution
Convection
dispersion
fixation approach
Montes, María Luciana
Silva, Luís M. S.
Sá, C.S.A.
Runco, Jorge
Taylor, Marcela Andrea
Desimoni, Judith
Inventories and concentration profiles of 137Cs in undisturbed soils in the northeast of Buenos Aires Province, Argentina
topic_facet Física
Ciencias Exactas
137Cs
Soil
Inventory
Vertical distribution
Convection
dispersion
fixation approach
description Inventories and vertical distribution of 137Cs were determined in La Plata region undisturbed soils, Argentina. A mean inventory value of 891 ± 220 Bq/m2 was established, which is compatible with the values expected from atmospheric weapon tests fallout. The study was complemented with pH, organic carbon fraction, texture and mineralogical soil analyses. Putting together Southern Hemisphere 137Cs inventory data, it is possible to correlate these data with the mean annual precipitations. The large differences in 137Cs concentration profiles were attributed to soil properties, especially the clay content and the pH values. A convection–dispersion 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 cm2/y to 0.4 cm2/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.
format Articulo
Articulo
author Montes, María Luciana
Silva, Luís M. S.
Sá, C.S.A.
Runco, Jorge
Taylor, Marcela Andrea
Desimoni, Judith
author_facet Montes, María Luciana
Silva, Luís M. S.
Sá, C.S.A.
Runco, Jorge
Taylor, Marcela Andrea
Desimoni, Judith
author_sort Montes, María Luciana
title Inventories and concentration profiles of 137Cs in undisturbed soils in the northeast of Buenos Aires Province, Argentina
title_short Inventories and concentration profiles of 137Cs in undisturbed soils in the northeast of Buenos Aires Province, Argentina
title_full Inventories and concentration profiles of 137Cs in undisturbed soils in the northeast of Buenos Aires Province, Argentina
title_fullStr Inventories and concentration profiles of 137Cs in undisturbed soils in the northeast of Buenos Aires Province, Argentina
title_full_unstemmed Inventories and concentration profiles of 137Cs in undisturbed soils in the northeast of Buenos Aires Province, Argentina
title_sort inventories and concentration profiles of 137cs in undisturbed soils in the northeast of buenos aires province, argentina
publishDate 2012
url http://sedici.unlp.edu.ar/handle/10915/128845
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