Karakterizacija šljake i pepela odloženog u Kaštel Gomilici

The objective of this study was to determine the chemical, radiological and leaching properties of slag and ash produced by a thermoelectric unit of a former factory Adriavinil and deposited in the area of Kaštel Gomilica near Split, Croatia. A total of 33 samples were analysed. The bioavailable fraction of the slag and ash was estimated using different leaching tests. The waste material was characterized by a high activity of naturally occurring radionuclides 238U, 235U and 226Ra and by elevated concentrations of heavy metals. The concentrations of most heavy metals were three to four times as high as in the common soil. Uranium slag and ash concentration was almost 40 times higher than in control soil. More than 37 % of the total U could be removed from the slag and ash with the sea water.U radu su kemijski i radiološki okarakterizirani uzorci šljake i pepela. Otpadni materijal je nastao radom termoelektričnog postrojenja bivše tvornice “Adriavinil”, a odložen je u Kaštel Gomilici u Hrvatskoj. Ukupno su analizirana 33 uzorka. Biodostupnost frakcija šljake i pepela određena je različitim testovima za izluživanje. U otpadnome materijalu određena je velika aktivnost radionuklida iz prirodnog niza, 238U, 235U i 226Ra, i povišene koncentracije teških metala. Koncentracije veæine teških metala 3 do 4 puta su veæe nego u kontrolnim uzorcima, dok je koncentracija urana veæa 40 puta. Utvrđeno je da se više od 37 % ukupnog urana iz uzorka može ukloniti izluživanjem u morskoj vodi

Radionuclides and selected elements in soil and honey from Gorski Kotar, Croatia

This research compared the transfer of 137Cs, 40K, Ca, Fe, Rb, Sr, Cu, Zn, Pb, Ni, Mn and Cr from soil into honey derived from meadow flora, mixtures of floral and honeydew honey, and honeydew honey from fir and spruce forests in Gorski Kotar, Croatia. Radionuclides were measured by gamma-ray spectrometry, while other element concentrations were measured by X-ray fluorescence (XRF). Transfer factors (Tf) from soils into the studied honey types, expressed as a percentage, are defined as the ratio between element concentration in honey and in soil multiplied by 100. No significant differences were found, at P < 0.05, for all studied element concentrations for honeydew honey and mixed honey, in relation to the respective soil types from which honeys were collected. Concentrations of all studied cations were, at P < 0.05, significantly higher in honeydew honey compared to either mixed honey or floral honey. Honeydew honey could be used as a pollution indicator of 137Cs, Cu, Rb, Cr and possibly Ni. © Inra/DIB/AGIB/Elsevier, Pari