“…However, it is challenging to completely eliminate such contaminants during recycling due to technological and economic limitations. Thus, traces of contaminants remain and may accumulate in the material cycle (Kral et al, 2013), which means that certain scrap fractions may no longer be usable as recyclates in high-end applications in the future (Dworak and Fellner, 2021;Gleich et al, 2004). Hence, material quality is generally only partially and not fully retained.…”