title: The effects of physicochemical properties on gamma emitting natural radionuclide levels in the soil profile of Istanbul.
abstract: The inventory of gamma-emitting radionuclides was determined in soil samples collected at six depth levels, from 15 locations in Istanbul metropolis. The activity concentrations of (232)Th, (238)U, (40)K were measured by means of gamma spectrometry. The average activity concentrations of (232)Th, (238)U, (40)K in the 30-cm depth soil were found as 32.1, 27.4, 393.1 Bq kg(-1), respectively. The mean value of the absorbed dose rate (D), annual effective dose equivalent (AEDE) from the outdoor terrestrial gamma radiation, Ra equivalent activity (Ra(eq)), and the external hazard index (H(ex)) were calculated as 48.7 nGy h(-1), 59.7 muSv, 104.1 Bq kg(-1), and 0.28, respectively. The effects of organic matter content, textural properties, and pH value of soil samples on the natural radionuclide levels were also investigated. The relations between natural radionuclide level and the physical and chemical properties of studied soil samples were mainly clarified with cluster analysis and Pearson correlation.
authors.affiliation: Faculty of Science, Department of Biology, Istanbul University, 34134, Vezneciler, Istanbul, Turkey. belmurat@istanbul.edu.tr
authors.forename: Murat
authors.initials: M
authors.lastname: Belivermis
authors.forename: Nder
authors.initials: N
authors.lastname: Kiliç
authors.forename: Yavuz
authors.initials: Y
authors.lastname: Cotuk
authors.forename: Sayhan
authors.initials: S
authors.lastname: Topcuoğlu
mesh_terms: D012990:Soil Pollutants, Radioactive / Q000032:analysis*; D014421:Turkey
chemical_list: D012990:Soil Pollutants, Radioactive