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Gewählte Master / Diploma Thesis:

Juliane Böck (2019): Einschätzung des Verwertungspotentials von Alt-LEDs mit Fokus auf Retrofit-Leuchtmittel.
Master / Diploma Thesis - Institut für Abfallwirtschaft (ABF-BOKU), BOKU-Universität für Bodenkultur, pp 116. UB BOKU obvsg

Data Source: ZID Abstracts
With the entry into force of the EU Ecodesign Directive in 2009 and the ban on inefficient light sources, light emitting diodes (LED) technology has moved into the focus of lighting technology. LEDs are currently the most energy-efficient light sources available on the market and will remain so in the near future. LEDs contain a large number of technology metals, whereby Europe is almost exclusively dependent on imports. At present, there are only lab-scale approaches to the recycling possibilities. One aim of the work is to find out how LED technology has developed over the last decade. The core question of the work is the basic characterization of LED retrofit light sources. This makes it possible to estimate the recycling potential of these LED light sources. In order to determine the material composition, deep decompositions of 20 LED light sources were carried out. The elementary composition of the LEDs and the metals was determined by X-ray fluorescence analysis. It was found that SMD-LED-lamps on average consist of 40% plastic. It is assumed that the plastics used mainly in SMD light sources contain flame retardants. These pose a hazard during recycling and should therefore not be recycled. Filament LED lamps have an average glass content of 70%, which is suitable for material recycling. The metal content varies due to the increasingly smaller cooler components and averages 15% for models from 2015 onwards. The analysis of the LEDs has shown that the number of technology metals used has increased with the higher efficiency over the course of development. Titanium, silver and copper are used as conductor metals. The phosphor contains gallium, yttrium, strontium and lutetium. Against the background of the constantly increasing technologization, the recovery of these as secondary raw materials should therefore be strived for in the future.

Beurteilende(r): Huber-Humer Marion
1.Mitwirkender: Part Florian

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