研究目的
Investigating the leaching of rare earth metals (REMs) from phosphor coating of waste fluorescent lamps for recovery purposes.
研究成果
The study successfully demonstrated a two-stage leaching process for efficient recovery of REMs from phosphor coating of waste fluorescent lamps, achieving high leaching extents under optimized conditions. The process reduces the effort required for separation of REMs during solvent extraction.
研究不足
The study is limited to the conditions and materials used, and the efficiency of REM recovery may vary with different phosphor compositions or collection methods.
1：Experimental Design and Method Selection:
The study involved the recovery of phosphor from spent linear fluorescent lamps using the end cut-push method, followed by characterization and leaching studies to determine optimum conditions for REM recovery.
2：Sample Selection and Data Sources:
Phosphor samples were collected from T5 super 80 linear fluorescent lamps.
3：List of Experimental Equipment and Materials:
Equipment included a closed three-necked flat-bottom flask, hot plate, temperature probe, and ICP-OES for metal concentration determination. Materials included sulphuric acid, hydrochloric acid, and nitric acid.
4：Experimental Procedures and Operational Workflow:
Leaching experiments were conducted under varying conditions of leachant, concentration, temperature, and pulp density. Sampling was done at intervals to monitor progress.
5：Data Analysis Methods:
Metal concentrations in leach liquors were determined by ICP-OES. Kinetic studies were conducted to understand the leaching process.
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