Investigation of adsorption and vertical migration of137Cs in three kinds of soil at Lublin vicinity

Abstract

The results of field, column and laboratory studies carried out on three types of mineral soils are encloses presented. Based on the field tests, average migration rates of 137Cs were calculated. The highest rate was found for the brown soil (FAO/UNESCO -Cambisol). Cesium migrated with the lowest rate in the podzol soil (FAO/UNESCO -Cambic Podzol). The column experiments confirmed the above observation. In laboratory tests the adsorption and desorption isotherms of Cs were determined on samples taken from 0-2 cm layers of each soil profile. It was found from the calculated partition coefficients that Cs is always irreversibly bonded to some extent, but it appears to be completely and irreversibly immobilized on the podzol soil. The permanent retention of cesium in the podzol soil was also confirmed by microcalorimetric studies. The desorption energy was negligibly small and amounted to -0.21 mJ/g. In the brown soil, containing prevailing amounts of loamy minerals, the desorption energy was found to be 106.89 mJ/g. The investigations are supplemented by the sorption kinetics measurements. These indicate that the adsorption equilibrium is reached after a dozen, up to twenty or so minutes.

History and current research in the field of radiochemistry at Maria Curie-Skłodowska University

“…Table 1 concerns 90 Sr determination [49, 60, 66, 68, 69], Tables 2 and 3 concern determination of 137 Cs [31, 47, 48, 60, 66, 69, 71–74], Table 4 concerns determination of alpha-emitting plutonium isotopes [47, 48, 76], and Table 5 concerns beta-emitting 241 Pu isotope [51, 77]. Table 6 presents the vertical migration rate of plutonium isotopes [51].…”

“…The summarized results of our studies concerning determination of isotopes in various components of the environment are gathered in Tables 1 , 2 , 3 , 4 , 5 and 6 , most often presented in the form of minimum and maximum values as well as arithmetic mean values and the year in which the measurements were made. Table 1 concerns 90 Sr determination [ 49 , 60 , 66 , 68 , 69 ], Tables 2 and 3 concern determination of 137 Cs [ 31 , 47 , 48 , 60 , 66 , 69 , 71 – 74 ], Table 4 concerns determination of alpha-emitting plutonium isotopes [ 47 , 48 , 76 ], and Table 5 concerns beta-emitting 241 Pu isotope [ 51 , 77 ]. Table 6 presents the vertical migration rate of plutonium isotopes [ 51 ].…”

Adsorption of asphaltenes from toluene on typical soils of Lublin region

“…Before sampling, the soil surface was cleaned of the overgrown plant parts and larger organic pieces. The samples were stored in polyethylene bags [62]. After transferring to the laboratory, the samples were dried in a drier at 80 8C and then screened on a 1 mm sieve to remove stones and larger organic fragments.…”

Environmental Remediation Technologies for Metal-Contaminated Soils

“…The downward migration rate of 137 Cs in soil is 0.34-0.81 cm year À1 for brown forest soil (Chibowski et al 1999;Rosèn et al 1999;H€ olgye and Malý 2000), which is a typical soil type in forest area in Japan. Mahara (1993) reported the downward rate of 0.1 cm year À1 for the unsaturated soil layer in the Nishiyama area of Nagasaki, Japan.…”