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(38-07) 137Cs-deposition as tracer of surface water sedimentation processes in middle Hungary. Heltai, György*,1, Gémesi, Zoltán2, Fekete, Ilona1, Szlepák, Emőke1, Kampfl, Györgyi1, 1 Department of Chemistry and Biochemistry, Szent István University, Gödöllõ, Hungary2 Reasearch Institute of Small Animal Husbandry, PO Box 417, Gödöllõ, Hungary ABSTRACT- As a consequence of Chernobyl accident a significant deposition of radionuclides was detected in 1986 in Hungary. In present studies the 137Cs isotope was utilized as radioactive tracer to follow element accumulation and transport processes in surface water sediments. In middle part of Hungary two surface water system was selected in Nord East direction from Budapest: 1) A nine-unit artificial lake chain created by rivulet Rákos runing through town of Gödöllö. The 1st and 7th lake unit is loaded by cleaned waste water of Gödöllö. 2) The valley of rivulet Galga from the source to joining to Zagyva river. The rivulet along this section is loaded by more communal and industrial waste water inlets. In first step horizontal maping of element accumulations was performed by means of emission spectrometry and Key words: sediment pollution, 137Cs, heavy metal contamination |
-spectroscopy. Principal component analysis was applied for ranking pollutant elements. By this way communal and industrial origin of contaminations was detected. On selected polluted areas vertical distribution of 137Cs-activity and element accumulations was determined on the basis of analysis of core samples. Detection of elevated level of 137Cs activity provided a time scale for sedimentation processes.