Work

Recycling of Critical Metals from Light‐Emitting Diodes

Year: 2024

Type: article

Abstract: Light‐emitting diodes (LED) are widely used for energy savings. A lot of different materials and especially metals are needed to produce LED. End‐of‐life LED contain critical metals like indium or rare earth elements. In this study, first a thermochemical step is used to recover the critical metal indium from LED with hydrochloric acid‐containing vapor from polyvinyl chloride as chlorine source. Then, the LED residue is leached with sulfuric acid and hydrogen peroxide. From the leachate, the heavy rare earth element lutetium can be extracted with n‐octanol and tributyl phosphate.

Source: Chemie Ingenieur Technik

DOI: 10.1002/cite.202400043

Authors: Michael Peer, Thomas Fehn, Alexander Hofmann, Burkhard Berninger, Werner Kunz

Institutions: Ostbayerische Technische Hochschule Amberg-Weiden, Fraunhofer Institute for Environmental, Safety and Energy Technology UMSICHT, University of Regensburg

Language: English

Topic: Recycling and Waste Management Techniques

Subfield: Waste Management and Disposal

Field: Environmental Science

Domain: Physical Sciences

SDG: Responsible consumption and production

Open Access status: hybrid

Estimated APC paid: $3,840