Activation Mechanism of Lead Ions in Perovskite Flotation with Octyl Hydroxamic Acid Collector
AbstractThe activation mechanism of lead ions (Pb2+) in perovskite flotation with an octyl hydroxamic acid collector was systematically investigated using microflotation experiments, zeta-potential measurements, adsorption tests, Fourier transform infrared (FT-IR) analysis, and X-ray photoelectron spectroscopy (XPS) analysis. The results of microflotation experiments and adsorption tests indicate that the presence of Pb2+ can promote the adsorption of octyl hydroxamic acid (OHA) on the perovskite surface and enhance the flotability of perovskite under weakly acidic conditions. The maximum recovery of 79.62% was obtained at pH 6.5 in the presence of Pb2+, and the maximum recovery of 57.93% was obtained at pH 5.7 without Pb2+. At pHs below 7, lead species are mainly present as Pb2+ and PbOH+ in the solution; besides this, the relative content of titanium increases on the perovskite surface. The adsorption of Pb2+ and PbOH+ on the perovskite surface makes the zeta-potential of perovskite shift positively, and increases the number of activated sites on the perovskite surface. FT-IR and XPS analyses confirm that OHA chemisorbs on the surface of Pb2+-activated perovskite and forms hydrophobic Pb-OHA complexes, which improve the flotability of perovskite. View Full-Text
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Zheng, Y.; Cui, Y.; Wang, W. Activation Mechanism of Lead Ions in Perovskite Flotation with Octyl Hydroxamic Acid Collector. Minerals 2018, 8, 341.
Zheng Y, Cui Y, Wang W. Activation Mechanism of Lead Ions in Perovskite Flotation with Octyl Hydroxamic Acid Collector. Minerals. 2018; 8(8):341.Chicago/Turabian Style
Zheng, Yu; Cui, Yating; Wang, Weiqing. 2018. "Activation Mechanism of Lead Ions in Perovskite Flotation with Octyl Hydroxamic Acid Collector." Minerals 8, no. 8: 341.
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