关键词:
Waste LED
Hydrothermal treatment
Recycling
Plastic PPA degradation
Packaging materials
摘要:
Light emitting diodes(LEDs)have accounted for most of the lighting market as the technology matures and costs continue to *** a new type of e-waste,LED is a double-edged sword,as it contains not only precious and rare metals but also organic packaging *** previous studies,LED recycling focused on recovering precious and strategic metals while ignoring harmful substances such as organic packaging *** crushing and other traditional methods,hydrothermal treatment can provide an environment-friendly process for decomposing packaging *** work developed a closed reaction vessel,where the degradation rate of plastic polyphthalamide(PPA)was close to 100%,with nano-TiO_(2)encapsulated in plastic PPA being efficiently recovered,while metals contained in LED were also recycled ***,the role of water in plastic PPA degradation that has been overlooked in current studies was explored and speculated in detail in this *** impact assessment revealed that the proposed recycling route for waste LED could significantly reduce the overall environmental impact compared to the currently published *** the developed method could reduce more than half the impact of global ***,this research provides a theoretical basis and a promising method for recycling other plastic-packaged e-waste devices,such as integrated circuits.