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  • Author or Editor: Z. Jeran x
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Abstract  

Adsorption of fine suspended material on the surface of aquatic plants may lead to great problems in the interpretation of results for their trace element composition, since it is quite impossible to clean the inorganic material from the biota completely. A carefully designed field experiment was performed in the River Stella in North-Eastern Italy aimed at studying the adsorption of fine suspended material on benthic algae-periphyton. More than 20 elements, were determined in water, suspended material and biota using k 0-INAA, and enrichment factors were calculated for selected elements using Sc as a normalizing element.

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Abstract  

Three watersheds were studied by sampling bulk precipitation deposition, seepage water at 50 cm soil depth and spring water. As the main analytical method for determination of trace elements and heavy metals in water samples, thek 0-based method of INAA was used. The results showed an increased content and concentration range of trace elements in precipitation, soil water and spring water in the vicinity of the otanj Thermal Power Plant. We demonstrated that thek 0-based method of INAA as a multielement nondestructive technique is a highly suitable approach to determining some toxic trace elements in environmental studies of the water cycle.

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Abstract  

Lichens, sampled around Chernobyl in 1990 and in Slovenia in 1992, were analyzed for radionuclides and elements, including Cs. Data were processed by Monte Carlo aided Target Transformation Factor (MCTTFA). The resulting factors indicate environmental accumulation routes. 40K : K and 210Pb : Pb ratios tested the procedure, showing fully mixed 40K and K, while for 210Pb and Pb the expected variability in specific radioactivity was confirmed. 137Cs showed a large factor-specific variability in 137Cs : Cs ratios. For the 1990 data, MCTTFA singled-out 137Cs in a separate factor, suggesting that the overall behavior of 137Cs cannot be derived from that of Cs: source (route)-related specific radioactivity makes that all individual transport-components should be taken into account.

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