Lead Recovery from Zinc Leaching Residue by Flotation

Yao, Wei; Li, Maolin; Zhang, Ming; Cui, Rui; Jiang, Hongqiang; Li, Yun; Zhou, Sheng

doi:10.1007/s11837-019-03526-4

Cited by 11 publications

(1 citation statement)

References 16 publications

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“…The peak at 628 cm −1 in the present study is identical to the peak observed at 627 cm −1 in the FTIR spectra of PbSO 4 and is attributed to the asymmetric stretching vibration of SO4 2− . [ 30 ] Under high magnification, a closely spaced doublet was observed at 777 and 795 cm −1 , as shown in Figure 6b, and is assigned to be the Ʋ 4 mode, while the Ʋ 3 bands from carbonate ions are observed at 1640 and 1421 cm −1 . The bands 453 and 530 cm −1 , which are observed at low wavenumber as shown in the FTIR spectrum in Figure 6b, are assigned to be due to the Ʋ 2 mode.…”

Section: Resultsmentioning

confidence: 99%

Determining the Structural Properties and Vibrational Modes of Annealed Lead Composite Material Deposit

Ahia,

Meyer,

Umeh

2024

Physica Status Solidi (a)

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Techniques for effectively harnessing lead (Pb) deposits for optimum utilization have attracted a lot of research interest. Results obtained from investigating the elemental composition, vibrational modes, and structural properties of a fired Pb composite deposit, which was purified using an electric kiln furnace and further annealed in palladium‐diffused hydrogen ambient, are reported in the present study. Both atomic force microscopy (AFM) and scanning electron microscopy (SEM) analysis on the deposit indicate that the Pb composite is composed of crystal‐like morphology. The vibrational modes obtained from the material are identical to the Raman spectrum reported for PbSO4 (anglesite). Also, data acquired from the energy dispersive X‐ray (EDX) analysis of the annealed Pb composite material confirmed the presence of zinc (Zn), carbon (C), silicon (Si), sulfur (S), and oxygen (O) in the material. At the same time, Pb appeared to be the primary constituent with reference to its weight percentage composition compared to other elements. Using the Fourier transform infrared (FTIR) spectroscopy technique, a slight shift in peak positions to higher wavenumbers was observed for most of the frequency bands in the FTIR spectrum compared to their position in the Raman spectrum. The cause of the shift in wavenumber is still subject to investigation but can be tentatively ascribed to be induced by factors such as a decrease in bond length because of modification in electronegativity of the atom or structural changes at the subatomic level. The photoluminescence (PL) spectra obtained from the sample showed overlapped weak emission bands which were observed in the ultraviolet (UV) and visible (VIS) region, while a small optical band gap of ∽ 0.1307 eV was extrapolated through the Tauc plot for the Pb composite material using a direct band gap transition approach. The findings from the present study may be vital for providing an improved understanding of the electronic and structural properties of the annealed Pb composite deposit, while promoting the development of a feasible approach for the recovery and recycling of Pb for future related applications.This article is protected by copyright. All rights reserved.

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Section: Resultsmentioning

confidence: 99%