| Abstract Scope |
Rare Earth Elements (REEs) are important raw materials because of their crucial applications. REE-containing items can be recycled for lower cost than ore-based primary production, especially waste fluorescent lamps. There are red, blue and green phosphor powders within the phosphor powder on the inner surface of fluorescent glasses. Red phosphorus powder contains yttrium oxide (Y2O3) and europium oxide (Eu2O3). Terbium oxide (Tb2O3), lanthanum oxide (La2O3), and Ce2O3 phases are attached to aluminate or phosphate radicals in blue and green phosphorus powders. In this study, microwave-assisted leaching was carried out to dissolve the leaching residue, which is formed by the exposure of the fluorescent powder to leaching at 80°C for 360 minutes. The effects of parameters such as solid-liquid ratio (0.2/100, 06/100, and 0.8/100), temperature (80, 120, 160°C), and time (15, 30, 60, and 90 min.) on dissolution efficiency of Ce, Tb, La metals in green and blue phosphors were investigated. |