T. Hirajima, A. Bissombolo
This study investigates the feasibility of using flotation for recovering rare earth phosphors from waste fluorescent lamps by measuring the zeta-potential of the phosphor materials. A series of tests were conducted on pure specimens, including white (calcium halo-phosphate), red, green, and blue (rare earth) phosphors, as well as actual waste materials. The experiments aimed to explore the effects of cationic (dodecyl ammonium acetate, DAA) and anionic (sodium dodecyl sulfate (SDS) and sodium oleate (NaOl)) collectors on floatability across different pH ranges. Results indicated that the application of flotation to actual discarded waste phosphors produced a two-stage separation scheme yielding sink products with compositions of 17.7–23.8% and 21.5–25.9% rare earth phosphors for DAA and SDS flotation, respectively. Recovery rates and Newton’s efficiencies were found to be approximately 70–90% and 0.26–0.37 for DAA flotation, as well as 66–82% and 0.18–0.20 for SDS flotation. This research highlights the potential of flotation as an effective method for recovering valuable materials from waste streams.
@article{94c0f957-d567-4dc6-866d-6c8c2e64e465,
title={Floatability of rare earth phosphors fro},
author={T. Hirajima and A. Bissombolo},
year={2026},
language={en}
}TY - JOUR TI - Floatability of rare earth phosphors fro AU - T. Hirajima AU - A. Bissombolo PY - 2026 LA - en ER -
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