Mechanochemical-Assisted Leaching of Lamp Phosphors: A Green Engineering Approach for Rare-Earth Recovery

摘要: Abstract Rare-earth elements (REEs) are essential metals for the design and development of sustainable energy applications. Recycling these from waste streams enriched in them is crucial securing an independent future supply This study compares mechanisms mechanical activation prior to a hydrometallurgical acid-leaching process solvometallurgical mechanochemical leaching recovery REEs green lamp phosphor, LaPO4:Ce3+,Tb3+. After 60 min processing time, REE rates showed significant enhancement 60% after cycled activation, 98% combined process. High-resolution transmission electron microscopy (HR-TEM) imaging disclosed cause improved rates: The patterns could be attributed changes crystal morphology monocrystalline polycrystalline. Reduction crystallite size nanoscale polycrystalline material creates irregular packing chemical units, resulting increase defect-rich grain boundaries crystals, which enhances A method was developed combine into single step, beneficial operational cost. results efficient simple that provides alternative greener recycling route phosphor waste.