title: Effect of microbial biomass reduction by gamma-irradiation on the sorption of 137Cs, 85Sr, 139Ce, 57Co, 109Cd, 65Zn, 103Ru, 95mTc, I by soils.
abstract: Six soils, two Sphagnum peat samples and a clay mineral were irradiated with 40 and 80 kGy (4 and 8 Mrad) from a 60Co source. As a result the microbial biomass, determined separately for each sample, decreased considerably. Depending on the radionuclide, the sorption, as characterised by the distribution coefficient, decreased, increased or remained unchanged. The effect of the irradiation on the sorption of the radionuclides depended, in general, also on the type of the sample, especially whether well humified soils, (e.g. crop soils), poorly humified samples (Sphagnum peat, O-horizon from woodland), or a clay mineral was employed. The data reveal that irradiation produces, besides sterilization, also other effects in soils, which can change their sorption properties.
authors.affiliation: Gesellschaft für Strahlen- und Umweltforschung (GSF) München, Institut für Strahlenschutz, Neuherberg, Federal Republic of Germany.
authors.forename: K
authors.initials: K
authors.lastname: Bunzl
authors.forename: W
authors.initials: W
authors.lastname: Schimmack
mesh_terms: D000327:Adsorption; D002106:Cadmium Radioisotopes; D002565:Cerium Radioisotopes; D002588:Cesium Radioisotopes; D003037:Cobalt Radioisotopes; D005720:Gamma Rays; D007457:Iodine Radioisotopes; D011839:Radiation, Ionizing; D011868:Radioisotopes; D012429:Ruthenium Radioisotopes; D012987:Soil; D012988:Soil Microbiology; D013242:Sterilization; D013326:Strontium Radioisotopes; D013667:Technetium; D015037:Zinc Radioisotopes
chemical_list: D002106:Cadmium Radioisotopes; D002565:Cerium Radioisotopes; D002588:Cesium Radioisotopes; D003037:Cobalt Radioisotopes; D007457:Iodine Radioisotopes; D011868:Radioisotopes; D012429:Ruthenium Radioisotopes; D012987:Soil; D013326:Strontium Radioisotopes; D015037:Zinc Radioisotopes; D013667:Technetium