Boštjan Lesar (Author), Miha Humar (Author)

Abstract

Krožno gospodarstvo in uporaba sekundarnih surovin postajata vedno polj pomembna. Uporaba odslu-ženega lesa za materialno izrabo je trenutno še zelo slabo izkoriščena. Večino odsluženega lesa se namreč pora-bi 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 brez 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.

Keywords

anorganska onesnažila;odslužena okna;kaskadna raba lesa;les;

Data

Language: Slovenian
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL BF - Biotechnical Faculty
UDC: 630*839.8
COBISS: 44827907 Link will open in a new window
ISSN: 0024-1067
Parent publication: Les
Views: 709
Downloads: 229
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Other data

Secondary language: English
Secondary title: Inorganic pollutants in used windows
Secondary abstract: 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.
Secondary keywords: inorganic pollutants;used windows;cascading use of wood;wood;
Type (COBISS): Article
Pages: str. 49-57
Volume: ǂLetn. ǂ69
Issue: ǂšt. ǂ2
Chronology: 2020
DOI: 10.26614/les-wood.2020.v69n02a01
ID: 12410074