20.500.12556/DKUM-45238 Biodostopnost in analiza vsebnosti kovin v vzorcih prsti Bioavailability and analysis of metal content in the soil samples Onesnaževanje okolja predstavlja veliko nevarnost za ljudi, živali in rastlinstvo. Kovine, predvsem težke kovine, so tiste, ki so potencialno nevarne, saj se kopičijo v tleh in tako ogrožajo življenja ljudi, rastlin in živali. V industrijskih območjih je vsebnost kovin antropogenega izvora nekajkrat višja od naravnega ozadja. Pomemben del predstavlja biodostopna količina kovin, ki jih rastline preko koreninskega sistema vključujejo v svoj metabolizem. V diplomskem delu smo določali koncentracije biodostopnih kovin v vzorcih prsti z območja opuščenega rudnika. Za ekstrakcijo Cd, Cr, Cu, Fe, Na, Pb in Zn smo uporabili ekstrakcijsko mešanico DTPA, CaCl2 in TEA, s pH vrednostjo 7,3, ki iz vzorcev prsti ekstrahira zadostno količino biodostopnih kovin. Analizo vzorcev smo opravili s pomočjo atomske absorpcijske spektrometrije (AAS) in s pomočjo induktivno sklopljene plazme z masno spektrometrijo (ICP-MS). Dobljene rezultate smo ovrednotili in jih primerjali z zakonsko določenimi vrednostmi. Koncentracije večine elementov ne presegajo z zakonom določenih mej, medtem ko koncentracije nekaterih elementov nismo mogli določiti, saj so bile vrednosti pod mejo detekcije. V vzorcih prsti je bila vsebnost Fe in Na najvišja, saj je koncentracija Fe je znašala kar 2441,9 mg/kg suhe mase. Environmental pollution represents a major threat to human population, animals and vegetation. Metals, especially heavy metals, represent a potential hazard, because they accumulate in the soil and therefore jeopardize the lives of people, plants and animals. Anthropogenic origin of metal content in industrial areas is several times higher than in the natural background. Plants include some of these metals in their metabolism through the root system. These, so called bioavailable metals, thus represent an important part. In the graduation thesis we determined concentrations of bioavailable metals in soil samples obtained from a former mine. For the extraction of Cd, Cr, Cu, Fe, Na, Pb and Zn we used an extraction mixture of DTPA, CaCl2, and TEA, with the pH value of 7,3. The extraction mixture extracted a sufficient amount of bioavailable metal from soil samples. We analyzed the samples with atomic absorption spectrometry (AAS) and inductively coupled plasma mass spectrometry (ICP-MS). Results were evaluated and compared to statutory limits. Concentrations of the most elements do not exceed limits prescribed by law, while the concentrations of some elements could not be determined, because their concentrations were below detection limit. The content of Fe and Na in soil was the highest – the highest concentration of Fe was 2441,9 mg/kg dry weight. biodostopnost kovine ekstrakcija AAS ICP-MS bioavailability metals extraction AAS ICP-MS true true false [D. Golub] Slovenski jezik Angleški jezik Diplomsko delo 2014-08-19 14:14:12 2014-10-07 13:05:01 2022-05-15 03:06:32 2021-05-02 03:09:28 2014 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 546.3:543.42:504.5(043.2) 20849416 URN:SI:UM:DK:XEFTWWXZ UNI_Golub_Doris_2014.pdf UNI_Golub_Doris_2014.pdf 1 44E460E62F3A4D07F781A3693E413E04 4f0b873a06e43fda0a5067b4f937117941c87423c1307b3976a131166857b431 0a8d4e84-7c0b-11eb-bb7a-00155d0001ca https://dk.um.si/Dokument.php?lang=slv&id=65394 Fakulteta za naravoslovje in matematiko 0 0 0