Recovery of gallium from waste light emitting diodes by oxalic acidic leaching

Recovery of gallium from light emitting diodes (LEDs) is receiving great attention due to both high content of gallium and potential risk of environmental pollution . In this study, a novel environment-friendly route was proposed for efficient recovery of gallium from surface mounted device (SMD) of LEDs by using organic acid . Reduction of non-metallic components, selection of lixiviants, optimization of leaching parameters, and possible...