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Volume 68, Issue 5


Influence of freezing on physicochemical forms of natural and technogenic radionuclides in Chernozem soil

Petya Kovacheva
  • Faculty of Chemistry and Pharmacy, University of Sofia “St. Kliment Ohridski”, 1, J. Bourchier Blvd., Sofia, 1164, Bulgaria
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/ Rumyana Djingova
  • Faculty of Chemistry and Pharmacy, University of Sofia “St. Kliment Ohridski”, 1, J. Bourchier Blvd., Sofia, 1164, Bulgaria
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Published Online: 2014-01-28 | DOI: https://doi.org/10.2478/s11696-013-0483-9


Sharp variations of different climatic parameters influence the transport, transfer, and deposition of contaminants in nature. Investigations of the impact of environmental temperature on the fractionation of radionuclides in soil are necessary for adequate assessment of their distribution and bioavailability in case of a nuclear accident. The impact of a sharp decrease of environmental temperature shortly after radioactive contamination on the physicochemical fractionation of natural and technogenic radionuclides in Chernozem soil and its influence on their potential migration ability and bioavailability in case of subsequent warming were evaluated. The soil was contaminated in a laboratory with 241Am, 60Co, 137Cs, 228Ra, 234Th, and U and two temperature regimes were used for storage. Changes of the radionuclides association with various soil phases in the first weeks after contamination were studied. Physicochemical forms of 241Am, 60Co, 228Ra, 234Th, and U were determined using two sequential extraction procedures. The ion-exchangeable forms of 137Cs were evaluated by single extraction with 1 M NH4NO3. The data showed that the freezing, following the radioisotope contamination of the soil, causes an increase of the amount of potentially mobile forms of radiocobalt, radiocesium, radium, and thorium and has an insignificant impact on the fractionation of americium and uranium.

Keywords: radionuclides; physicochemical forms; freezing; Chernozem soil

  • [1] Dowdall, M., Standring, W., Shaw, G., & Strand, P. (2008). Will global warming affect soil-to-plant transfer of radionuclides? Journal of Environmental Radioactivity, 99, 1736–1745. DOI: 10.1016/j.jenvrad.2008.06.012. http://dx.doi.org/10.1016/j.jenvrad.2008.06.012CrossrefWeb of ScienceGoogle Scholar

  • [2] Filgueiras, A. V., Lavilla, I., & Bendicho, C. (2002). Chemical sequential extraction for metal partitioning in environmental solid samples. Journal of Environmental Monitoring, 4, 823–857. DOI: 10.1039/b207574c. http://dx.doi.org/10.1039/b207574cCrossrefGoogle Scholar

  • [3] IAEA (2006). Classification of soil systems on the basis of transfer factors on radionuclides from soil to reference plants. Vienna, Austria: International Atomic Energy Agency. (IAEA-TECDOC-1497) Google Scholar

  • [4] Ishikawa, N. K., Uchida, S., & Tagami, K. (2009). Radiocesium sorption behavior on illite, kaolinite, and their mixtures. Radioprotection, 44(5), 141–145. DOI: 10.1051/radiopro/20095030. http://dx.doi.org/10.1051/radiopro/20095030CrossrefGoogle Scholar

  • [5] Kabata-Pendias, A., & Pendias, H. (2001). Trace elements in soils and plants (3rd ed.). Boca Raton, FL, USA: CRC Press. Google Scholar

  • [6] Koch-Steindl, H., & Pröhl, G. (2001). Considerations on the behaviour of long-lived radionuclides in the soil. Radiation and Environmental Biophysics, 40, 93–104. DOI: 10.1007/s004110100098. http://dx.doi.org/10.1007/s004110100098CrossrefGoogle Scholar

  • [7] Kovacheva, P., Yovkova, D., Todorov, B., & Djingova, R. (2013). Effects of freezing and soil drought on the geochemical fractionation of americium in Fluvisol and Cambisol soils from Bulgaria. Central European Geology, (in press). Google Scholar

  • [8] Marion, G. M. (1995). Freeze-thaw processes and soil chemistry. Hanover, NH, USA: U.S. Army Cold Regions Research and Engineering Laboratory. (Special report 95-12) Google Scholar

  • [9] Megumi, K., & Mamuro, T. (1977). Concentration of uranium series nuclides in soil particles in relation to their size. Journal of Geophysical Research, 82, 353–356. DOI: 10.1029/jb082i002p00353. http://dx.doi.org/10.1029/JB082i002p00353CrossrefGoogle Scholar

  • [10] Lehrsch, G. A., Sojka, R. E., Carter, D. L., & Jolley, P. M. (1991). Freezing effects on aggregate stability affected by texture, mineralogy, and organic matter. Soil Science Society of America Journal, 55, 1401–1406. DOI: 10.2136/sssaj1991.03615995005500050033x. http://dx.doi.org/10.2136/sssaj1991.03615995005500050033xWeb of ScienceCrossrefGoogle Scholar

  • [11] Rao, C. R. M., Sahuquillo, A., & Lopez Sanchez, J. F. (2008). A review of the different methods applied in environmental geochemistry for single and sequential extraction of trace elements in soils and related materials. Water, Air, & Soil Pollution, 189, 291–333. DOI: 10.1007/s11270-007-9564-0. http://dx.doi.org/10.1007/s11270-007-9564-0CrossrefGoogle Scholar

  • [12] Schultz, M. K., Burnett, W. C., & Inn, K. G. W. (1998). Evaluation of a sequential extraction method for determining actinide fractionation in soils and sediments. Journal of Environmental Radioactivity, 40, 155–174. DOI: 10.1016/s0265-931x(97)00075-1. http://dx.doi.org/10.1016/S0265-931X(97)00075-1CrossrefGoogle Scholar

  • [13] Ure, A. M., Quevauviller, P. H., Muntau, H., & Griepink, B. (1993). Speciation of heavy metals in soils and sediments. An account of the improvement and harmonization of extraction techniques undertaken under the auspices of the BCR of the Commission of European Communities. International Journal of Environmental Analytical Chemistry, 51, 135–151. DOI: 10.1080/03067319308027619. http://dx.doi.org/10.1080/03067319308027619CrossrefGoogle Scholar

  • [14] Wong, S. C., Li, X. D., Zhang, G., Qi, S. H., & Min, Y. S. (2002). Heavy metals in agricultural soils of the Pearl River Delta, South China. Environmental Pollution, 119, 33–44. DOI: 10.1016/s0269-7491(01)00325-6. http://dx.doi.org/10.1016/S0269-7491(01)00325-6CrossrefGoogle Scholar

About the article

Published Online: 2014-01-28

Published in Print: 2014-05-01

Citation Information: Chemical Papers, Volume 68, Issue 5, Pages 714–718, ISSN (Online) 1336-9075, DOI: https://doi.org/10.2478/s11696-013-0483-9.

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