Accumulation of radioiodine from aqueous solution by hydroponically cultivated sunflower (Helianthus annuus L.) |
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| Affiliation: | 1. Unité de Modélisation du Climat et des Cycles Biogéochimiques, Université de Liège, Quartier Agora, Bât. B5c, Allée du 6 Août 19C, B-4000 Liège, Belgium;2. Senckenberg Research Institute, Heidelberg Academy of Sciences and Humanities, ROCEEH Research Center “The Role of Culture in Early Expansions of Humans”, Senckenberganlage 25, D-60325 Frankfurt M, Germany;3. Steinmann Institute, University of Bonn, Nussallee 8, D-53115 Bonn, Germany;4. Senckenberg Research Institute, Biodiversity and Climate Research Centre (BiK-F), Frankfurt M, Germany;5. School of Environment, Earth, and Ecosystem Sciences, The Open University, Milton Keynes MK7 6AA, United Kingdom;6. Institute of Botany, Chinese Academy of Sciences, No.20 Nanxincun, Xiangshan, Beijing 100093, China;1. Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Ac. of Sci., Kosygin Str., 19, 119991 Moscow, Russia;2. Unitary Enterprise “Geo-information Systems”, National Academy of Sciences of Belorussia, Surganov Str., 6, 220004 Minsk, Belarus;1. Departament de Dinàmica de la Terra i de l''Oceà, Facultat de Ciències de la Terra, Universitat de Barcelona-UB, 08028 Barcelona, Catalonia, Spain;2. Department of Geology, American University of Beirut-AUB, 11-0236 Beirut, Lebanon;1. Institute of Biology and Soil Science, Far Eastern Branch, Russian Academy of Sciences, Prospect Stoletiya Vladivostoka 159, Vladivostok 690022, Russia;2. Senckenberg Research Institute, Heidelberg Academy of Sciences and Humanities, ROCEEH Research Center “The Role of Culture in Early Expansions of Humans”, Senckenberganlage 25, 60325 Frankfurt M., Germany;3. Unité de Modélisation du Climat et des Cycles Biogéochimiques (UMCCB), Université de Liège, Quartier Agora, Bât. B5c, Allée du Six Août 19C, B-4000 Liège, Belgium;4. Senckenberg Research Institute and Natural Museum, Senckenberganlage 25, 60325 Frankfurt M., Germany;5. Steinmann Institute, University of Bonn, Nussallee 8, 53115 Bonn, Germany |
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| Abstract: | The suitability of sunflower plants (Helianthus annuus L.) for the phytoremediation of soils and waters contaminated with radioactive iodine was tested following the 125I uptake from a hydroponic medium and translocation during 32-day cultivation. The plants accumulated about 26% of the applied activity in case of combination of 125I (1.3 MBq) and 0.1 mM K127I (“carrier 125I”) and 47% when only 125I (1.3 MBq, “non-carrier 125I”) was added. When hydroponic medium was changed for the fresh one every 4 days, the plants accumulated up to 59% of starting activity of non-carrier 125I. The 125I distribution within the plant was followed using autoradiography. At low iodine level (non-carrier 125I) the radionuclide was localized mainly in the roots. At high iodine concentrations (carrier 125I) it was found mainly in the upper part of sunflower plants. All iodine removed from the liquid medium was found in the plant body. Volatilization of iodine (in the form of I0 or volatile organic compounds) apparently did not occur during accumulation and translocation. The achieved results indicate that sunflower can be used for phytoremediation of radioactive iodine, even if it is not its hyperaccumulator. |
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