Concentration levels of technetium-99 in forest soils collected within the 30-km zone around the Chernobyl reactor |
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| Affiliation: | 1. Environmental and Toxicological Sciences Research Group, National Institute of Radiological Sciences, 9–1 Anagawa 4-chome, Inage-ku, Chiba-shi, 263-855, Japan;2. Federal Office for Radiation Protection, Institute of Radiation Hygiene, Ingolstädter Landstr. 1, D-85762 Oberschleißheim, Germany;3. Institute for Radiation Biology, Ludwig Maximilians Universität München, Schillerstr. 42, D-80336 München, Germany;1. Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, 1 Bld.3, Moscow, Russia, 119991;2. School of Nuclear Science and Technology, Lanzhou University, Lanzhou, 730000, China;3. Institute of Geography, RAS, Staromonetny Per. 29, Bld. 4, Moscow, Russia;4. Vernadsky Institute of Geochemistry and Analytical Chemistry, RAS, St. Kosygin 19, Moscow, Russia, 119991;1. Mining and Smelting Institute after O.A. Baikonurov, Kazakh National Technical University named after K.I. Satpaev, Satpaev Street 22, Almaty 050013, Republic of Kazakhstan;2. Mineral–Metal Recovery and Recycling Research Group, Mineral Processing Division, Department of Mining Engineering, Suleyman Demirel University, Isparta TR32260, Turkey;1. Faculty of Science, Energy, and Environment, King Mongkut’s University of Technology North Bangkok, Rayong Campus, Rayong 21120, Thailand;2. National Nanotechnology Center (NANOTEC), 111 Thailand Science Park, Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani 12120 Thailand;3. Extreme Condition Physics Research Laboratory, Physics of Energy Materials Research Unit, Department of Physics, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand;1. Department of Mathematics and Physics, Roma Tre University, Via ''della Vasca Navale, 84, I-00146, Rome, Italy;2. Department of Physics and Astronomy, Alma Mater Studiorum University of Bologna, Via Irnerio 46, 40126, Bologna, BO, Italy;3. Institute of Meteorology, Faculty of Physics, University of Belgrade, Studentski trg 18, 11000, Belgrade, Serbia;4. European Commission, Joint Research Centre, Knowledge for Nuclear Security and Safety Unit Radioactivity Environmental Monitoring Group, Via Enrico Fermi 2749, I-21027, Ispra, VA, Italy;5. Faculty of Veterinary Medicine, University of Belgrade, Bulevar oslobođenja 18, 11000, Belgrade, Serbia |
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| Abstract: | Technetium-99 (99Tc) concentrations in surface soil samples collected from three forest sites within the 30-km zone around the Chernobyl reactor were determined. A simple and rapid analytical method, which consists of volatilizing and trapping Tc in a combustion apparatus, purifying the Tc with an extraction chromatographic resin and measuring it by ICP-MS, was used for the determination. The concentrations of 99Tc in the samples ranged from 1.1 to 14.1 Bq kg−1 on an air-dried soil basis. The activities of the nuclide in the soils around the Chernobyl reactor were one or two orders of magnitude higher than in other areas which were less affected by the accident. The activity ratios of 99Tc/137Cs ratios in the soils were calculated as on the order of 3.7×10−5 to 1.3×10−4. |
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