Leaching Process Applied to Fluorescent Lamps of Different Brands to Obtain Rare-Earth Elements: A case study in Peru

Valerio J.; Quintana M.; Rivera H.; Hojenska A.; Łukowiak A.; Rodriguez J.M. · Proceedings of the LACCEI international Multi-conference for Engineering, Education and Technology (2022)

Resumen

In this work, the results in the various stages of rare-earth recycling from Phillips branded fluorescent lamps compared with generic products are presented. Energy Dispersive X-Ray Fluorescence, Energy Dispersive Spectroscopy, and Inductively Coupled Plasma Mass Spectrometry was used to characterize the products. The results show that the rare-earth elements present in the material before recycling are: cerium (Ce), europium (Eu), lanthanum (La), terbium (Tb), and yttrium (Y). Besides, Phillips brand fluorescent lamps have a higher percentage of rare-earth by mass than generic ones. After characterizing the fluorescent raw powder, the multi-stage acid leaching method was used as a working method for recycling, obtaining the complete extraction of yttrium as a relevant result.

Instituciones: Universidad Nacional de Ingeniería