20.500.12556/RUL-171858 Selektivna separacija magnezija iz dolomita in analiza z ICP-OES Selective separation of magnesium from dolomite and analysis by ICP-OES Magnezij (Mg) in njegove spojine so zelo pomembni na mnogih področjih. Eden najbolj razširjenih in najprimernejših virov Mg je dolomit. Iz dolomita je Mg mogoče pridobiti z uporabo selektivnega raztapljanja in selektivnega obarjanja, kar je tudi glavna tema diplomske naloge. Dvema vzorcema slovenskega dolomita sem določil sestavo z mikrovalovnim razklopom in analizo z ICP OES. Na enem od vzorcev sem preverjal vpliv deleža ekvivalenta in volumna reagenta pri selektivnem raztapljanju z žveplovo (VI), oksalno in vinsko kislino ter selektivnem obarjanju z natrijevim hidroksidom. Uspešnost postopka sem ovrednotil z izkoristkom raztapljanja Mg in molskim razmerjem Mg/Ca. Optimalne postopke sem preizkusil še na drugem vzorcu. Oba vzorca sta bila zelo blizu idealnemu dolomitu. Optimalni postopki so bili zelo učinkoviti in selektivni za Mg. Najboljši postopek je za prvi vzorec dosegel 98,3 % izkoristek za Mg in molsko razmerje Mg/Ca = 155, za drugi vzorec pa 66,1 % izkoristek za Mg in Mg/Ca = 327. Magnesium (Mg) and its compounds are vital in many areas. One of the best and most common sources of Mg is dolomite. The main topic of this work is the separation of Mg from dolomite, which can be achieved by selective leaching and selective precipitation. The elemental composition of two samples of Slovenian dolomite was determined by microwave digestion and analysis by ICP OES. The effect of reagent equivalent and volume on leaching with sulfuric (VI), oxalic and tartaric acid and precipitation with sodium hydroxide was determined on one of the samples. The effectiveness of the processes was evaluated by calculating the Mg yield and the molar ratio Mg/Ca. Optimal procedures were then tested on the second sample. Both samples were very close to ideal dolomite. The optimal methods demonstrated high yield and selectivity for Mg. The best procedure achieved a yield of 98.3 % for Mg and a molar ratio (Mg/Ca) of 155 for the first sample, but was less effective for the second sample with a Mg yield of 66.1 % and a Mg/Ca ratio of 327. magnezij dolomit selektivno raztapljanje selektivno obarjanje ICP-OES magnesium dolomite selective leaching selective precipitation ICP-OES true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2025-09-03 13:45:01 2025-09-03 13:45:08 2025-10-10 13:32:36 0000-00-00 00:00:00 2025 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 25656 252719107 Carman_Tal_-_Selektivna_separacija_magnezija_iz_dolomita_in_analiza_z_ICP-OES.pdf Carman_Tal_-_Selektivna_separacija_magnezija_iz_dolomita_in_analiza_z_ICP-OES.pdf 1 34E27B884FC0AEE1A72264C586F4E24E 55f362fb50f32e0580a543666ef543daf7230b4bffa101a583d4a24de17b4301 4c078959-88bb-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=215395 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0