Due to the continuously growing demand of rare earths in advanced technologies, end-of-life fluorescent lamps may become feasible rare earth elements (REEs) raw materials, reducing thus their supply risk. Considering acid leaching as the most common method in the metal recover from an end-of-life product real scratch resulting from the fluorescent lamps, this paper proposes an improvement of the REEs recovery from these wastes adding a supported liquid membrane (SLM) step to minimize the loss of these metals in the first leaching (L1). HNO₃ or HCl are the most appropriate acid agents in the L1 stage considering the balance between the Ca (II) impurity removal and the REEs losses minimization. These REEs lost can be entirely recovered from the L1 leachate by flat sheet supported liquid membranes (FSSLM) using Cyanex 923 as carrier and Na₂EDTA as the receiving phase. REEs, especially Y and Eu, have been recovered in quantitative yields using a L1–FSSLM–L2 process.

由于先进技术对稀土的需求不断增长，报废荧光灯可能会成为可行的稀土元素（REE）原材料，从而降低其供应风险。考虑到酸浸是从荧光灯导致的报废产品实际刮伤中回收金属中最常用的方法，因此，本文提出了一种改进的方法，即从这些废料中回收稀土元素，并在其中添加了支撑液膜（SLM）步骤。最小化第一次浸提中这些金属的损失（L1）。HNO ₃考虑到Ca（II）杂质去除与REEs损失最小化之间的平衡，在L1阶段，HCl或HCl是最合适的酸剂。这些损失的REE可以通过平板支撑的液膜（FSSLM）使用Cyanex 923作为载体和Na ₂ EDTA作为接收相，从L1渗滤液中完全回收。使用L1-FSSLM-L2工艺已定量回收了REE，尤其是Y和Eu。