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Προσδιορισμός βρωμιούχων επιβραδυντών φλόγας (BFRs) σε πλαστικά από απόβλητα ηλεκτρικού και ηλεκτρονικού εξοπλισμού

Tsoka Maria-Martha

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URI: http://purl.tuc.gr/dl/dias/E01EE361-DDBD-493D-B766-FD21026A5553
Year 2017
Type of Item Diploma Work
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Summary

The rapid progress of technology of Electrical and Electronic Equipment (EEE) has led to the rapid rotation and decrease of the lifetime of electronic device and production of improved models in a very short time compared to the past. While the depreciation of existing devices results in big production Waste Electrical and Electronic Equipment (WEEE). This phenomenon is expected to intensify in the coming years. Because of the complex composition of the risk of increasing the volume and the significant environmental impact caused by the production has caused the interest of researchers. The high energy requirements of the WEEE management is a modern complex environmental issue and also an interesting scientific challengeThis study focuses on the management of toxic and hazardous substances such as toxic metals and flame retardants such as those found in plastic pieces from PC and poly-printers. For this reason, the aim of this study was to develop a methodology for quantitatively and qualitatively of brominated flame retardants (BFR) plastics in WEEE. Demonstrated the existence of BFR as hexabromocyclodecane (HBCD), and tetrobromobisphenol-A (TBBPA) due to how important are these substances and the widespread use of them.More specifically in the theoretical part of the work brominated flame retardants were presented, their effects on human health and the environment, and the existing legislation about them.Then, there were the processes that took place in the experimental section in samples of plastic waste from computers and the multi-functional printers (MFPs). Briefly, plastic a) converted by means of appropriate tools at the crumbs(crushed and grating small pieces) and then the size further reduced by using liquid nitrogen, b) placed in a solution of organic solvents in a special bath using ultrasound or microwave system for the extraction of the studied substances and, c) to extract the concentrations of substances were analyzed in the spectrum are absorbed under the High pressure liquid chromatography (HPLC) operating principle the results confirm the presence of TBBPA and HBCD in plastics samples of WEEE, and TBBPA was proved by the estimations and also by literature review study that is the most dominant flame retardant found in Electrical and Electronic equipment. Finally, it was found by using high performance liquid chromatography (HPLC) that TBBPA is very unstable substance and need very careful handling during the quantification procedure.

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