20.500.12556/RUL-124417 Anorganska onesnažila v odsluženih oknih Inorganic pollutants in used windows Krožno gospodarstvo in uporaba sekundarnih surovin postajata vedno polj pomembna. Uporaba odsluženega lesa za materialno izrabo je trenutno še zelo slabo izkoriščena. Večino odsluženega lesa se namreč porabi v energetske namene. Eden od potencialnih virov odsluženega lesa so tudi stara lesena okna. Večino oken se v današnjem času zamenja zaradi neustreznih energetskih karakteristik, medem ko je les večine zamenjanih oken še https://repozitorij.uni-lj.si/IzpisGradiva.php?id=124417brez znakov razkroja. Težavo pri uporabi lesa odsluženih oken za proizvodnjo novih izdelkov predstavljajo predvsem površinski premazi. V raziskavi smo preverili vpliv starosti, tipa in površinske obdelave na delež onesnažil. Iz okenskih profilov smo najprej odstranili vse nelesne materiale, profile razžagali po debelini, ter s tem preverili, kako globoko v les so prodrla anorganska onesnažila. Les smo analizirali z rentgenskim fluorescenčnim spektrometrom (in določili deleže posameznih anorganskih onesnažil (Cr, Cu, Cl, Fe, Zn, Pb). Rezultati so pokazali, da odslužena okna vsebujejo anorganska onesnažila zgolj na površini (do 5 mm globoko), količine onesnažil močno variirajo glede na starost oken in uporabljeno površinsko zaščito. Raziskava je pokazala, da so odslužena okna lahko surovina za proizvodnjo novih izdelkov in materialov, ob pogoju, da pred uporabo odstranimo površinski sloj. Although the circular economy and use of secondary raw materials are becoming increasingly important, recycled wood is currently still very poorly utilised, with most used to produce energy. One potential sources of recycled wood is old wooden windows. Many wooden windows are now being replaced due to inadequate energy characteristics, while such wood is often still in good condition, without signs of decay. The main problem with the use of wood from used windows for the production of new products is surface coatings. The study examined the influence of age, type and surface treatment on the proportion of inorganic pollutants. First, all non-wood materials were removed from the window profiles. Afterwards, the profiles were cut into the 5 mm thick slides, to measure how deeply the inorganic contaminants penetrated into the wood. The wood was analysed with an X-ray fluorescent spectrometer, and the concentrations of individual inorganic pollutants were determined (Cr, Cu, Cl, Fe, Zn, Pb). The results showed that the concentrations of inorganic pollutants depended on the age of the windows and the surface protection used. This study has shown that used windows can be a raw material for the production of new products and materials, provided that the surface layer is removed before use. anorganska onesnažila odslužena okna kaskadna raba lesa les inorganic pollutants used windows cascading use of wood wood true false true Slovenski jezik Angleški jezik Članek v reviji 2021-01-20 23:37:09 2021-01-20 23:37:20 2024-04-11 10:37:53 0000-00-00 00:00:00 2020 0 0 Str. 49-57 št. 2 Let. 69 2020 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*839.8 0024-1067 10.26614/les-wood.2020.v69n02a01 44827907 13940224 RAZ_Lesar_Bostjan_2020.pdf RAZ_Lesar_Bostjan_2020.pdf 1 36FCF2443D054DF919CFFBF0F2F4CE97 e77558be5d8bde5af21c4f1213f9e7594fb0c49e34b0cd28368b521337c960e5 8c910d11-a1bb-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=139907 https://journals.uni-lj.si/les-wood/article/view/12127 0 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=139906 Biotehniška fakulteta Les 0 0 0