After some time following the global depositions and pollution after the Chernobyl NPP accident, Lithuanian soils are most contaminated with 137Cs and 90Sr.
In the work the 137Cs accumulation as well as vertical and horizontal migration in soil have been evaluated. The specific activity of the artificial origin 137Cs in tree segments has been determined, coefficients of its transfer from soil to various parts of the woody plant have been evaluated and compared with the transfer of the natural origin radionuclide 40K.
The radionuclide accumulation both in soil and plants, wash–out from the environment and radioactive decay last for years, therefore it is expedient to choose proper methods and evaluate tendencies of the long–term contamination variation. Radionuclides having penetrated into the environment are accumulated in the vegetative ground cover and upper soil layer. Their accumulation in plants occurs directly from the atmosphere through their above–ground parts, while from leaves, branches and sprays as well as root surface radionuclides get into plant tissues and join the biological metabolism. These processes have not been evaluated sufficiently yet, though it is important from both biological and environmental point of view. After evaluating the radionuclide penetration into trees through their above–ground part and roots, radionuclide accumulation and distribution in a tree can be modeled and forecasted as well as a reverse task can be solved – their volume... [to full text]
| Identifer | oai:union.ndltd.org:LABT_ETD/oai:elaba.lt:LT-eLABa-0001:E.02~2005~D_20051118_124754-46097 |
| Date | 18 November 2005 |
| Creators | Beinaravičius, Rimantas |
| Contributors | prof. habil. dr.SIRVYDAS, Povilas Algimantas, habil. dr. DARGINAVIČIENĖ, Jūratė, dr.MORKŪNAS, Gendrutis, prof. habil. dr. STYRO, Dmitrijus, doc. dr.GIRGŽDYS, Aloyzas, prof. habil. dr. BUTKUS, Donatas, doc. dr. VASAREVIČIUS, Saulius, habil. dr. MAŽEIKA, Jonas, Vilnius Gediminas Technical University |
| Publisher | Lithuanian Academic Libraries Network (LABT), Vilnius Gediminas Technical University |
| Source Sets | Lithuanian ETD submission system |
| Language | Lithuanian |
| Detected Language | English |
| Type | Doctoral thesis |
| Format | application/pdf |
| Source | http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2005~D_20051118_124754-46097 |
| Rights | Unrestricted |
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