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dc.contributor.authorShishkina, Elena A.
dc.contributor.authorPryakhin, Evgeny A.
dc.contributor.authorPopova, Irina Ya.
dc.contributor.authorOsipov, Denis I.
dc.contributor.authorTikhova, Yu.
dc.contributor.authorAndreyev, S.S.
dc.contributor.authorShaposhnikova, I.A.
dc.contributor.authorEgoreichenkov, E.A.
dc.contributor.authorStyazhkina, E.V.
dc.contributor.authorDeryabina, Larisa V.
dc.contributor.authorTryapitsina, Galina A.
dc.contributor.authorMelnikov, Viktor S.
dc.contributor.authorRudolfsen, Geir
dc.contributor.authorTeien, Hans-Christian
dc.contributor.authorSneve, Malgorzata Karpov
dc.contributor.authorAkleyev, Alexander V.
dc.date.accessioned2017-03-10T18:22:24Z
dc.date.available2017-03-10T18:22:24Z
dc.date.issued2016
dc.description.abstractEmpirical data on the behavior of radionuclides in aquatic ecosystems are needed for radioecological modeling, which is commonly used for predicting transfer of radionuclides, estimating doses, and assessing possible adverse effects on species and communities. Preliminary studies of radioecological parameters including distribution coefficients and concentration ratios, for 90Sr and 137Cs were not in full agreement with the default values used in the ERICA Tool and the RESRAD BIOTA codes. The unique radiation situation in the Techa River, which was contaminated by long-lived radionuclides (90Sr and 137Cs) in the middle of the last century allows improved knowledge about these parameters for river systems. Therefore, the study was focused on the evaluation of radioecological parameters (distribution coefficients and concentration ratios for 90Sr and 137Cs) for the Techa River and the Miass River, which is assumed as a comparison waterbody. To achieve the aim the current contamination of biotic and abiotic components of the river ecosystems was studied; distribution coefficients for 90Sr and 137Cs were calculated; concentration ratios of 90Sr and 137Cs for three fish species (roach, perch and pike), gastropods and filamentous algae were evaluated. Study results were then compared with default values available for use in the well-known computer codes ERICA Tool and RESRAD BIOTA (when site-specific data are not available). We show that the concentration ratios of 137Cs in whole fish bodies depend on the predominant type of nutrition (carnivores and phytophagous). The results presented here are useful in the context of improving of tools for assessing concentrations of radionuclides in biota, which could rely on a wider range of ecosystem information compared with the process limited the current versions of ERICA and RESRAD codes. Further, the concentration ratios of 90Sr are species-specific and strongly dependent on Ca2+ concentration in water. The universal characteristic allows us to combine the data of fish caught in the water with different mineralization by multiplying the concentration of Ca2+. The concentration ratios for fishes were well-fitted by Generalized Logistic Distribution function (GLD). In conclusion, the GLD can be used for probabilistic modeling of the concentration ratios in freshwater fishes to improve the confidence in the modeling results. This is important in the context of risk assessment and regulatory.en_US
dc.descriptionSource:<a href=http://dx.doi.org/10.1016/j.jenvrad.2016.04.005>http://www.sciencedirect.com/science/article/pii/S0265931X16300959</a>en_US
dc.identifier.citationShishkina, Pryakhin, Popova, Osipov, Tikhova, Andreyev, Shaposhnikova, Egoreichenkov, Styazhkina, Deryabina, Tryapitsina, Melnikov, Rudolfsen G, Teien H, Sneve MK, Akleyev. Evaluation of distribution coefficients and concentration ratios of 90Sr and 137Cs in the Techa River and the Miass River. Journal of Environmental Radioactivity. 2016;158-159:148-163en_US
dc.identifier.cristinIDFRIDAID 1370893
dc.identifier.doi10.1016/j.jenvrad.2016.04.005
dc.identifier.issn0265-931X
dc.identifier.issn1879-1700
dc.identifier.urihttps://hdl.handle.net/10037/10564
dc.language.isoengen_US
dc.publisherElsevier. Journal of Environmental Radioactivityen_US
dc.relation.journalJournal of Environmental Radioactivity
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400en_US
dc.subjectAquatic ecosystemsen_US
dc.subjectBackground radiationen_US
dc.subjectDistribution coefficienten_US
dc.subjectStrontium-90en_US
dc.subjectCesium-137en_US
dc.title.alternativeEvaluation of distribution coefficients and concentration ratios of <sup>90</sup>Sr and <sup>137</sup>Cs in the Techa River and the Miass Riveren_US
dc.titleEvaluation of distribution coefficients and concentration ratios of 90Sr and 137Cs in the Techa River and the Miass Riveren_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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