Lead adsorption on copper sulphides and the relevance to its contamination in copper concentrates

Hamilton, Toby; Huai, Yangyang; Peng, Yongjun

doi:10.1016/j.mineng.2020.106381

Cited by 11 publications

(3 citation statements)

References 29 publications

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“…The results indicate very high Pearson's cor cients (>0.8) (Figure 6a) and cosine similarities (>0.75) (Figure 6b) for all ad comparing the Pb and S EDS maps. This observation agrees with result Hamilton et al [48], Macıás-Garcıá et al [49], and Li et al [50] in which it that Pb chemically interacts with S during adsorption, forming strong surf It is also very interesting to note the strong correlation between the correlat and cosine similarities measured (Figure 6c), providing strong support for In addition, the EDS spectrum for each metabolically inhibited adsorbent clearly shows the peaks for Pb, confirming its existence on the surface of the adsorbents after sorption was carried out. This observation was also reported by [6].…”

Section: Characterization Of Adsorbentssupporting

confidence: 93%

“…The results indicate very high Pearson's correlation coefficients (>0.8) (Figure 6a) and cosine similarities (>0.75) (Figure 6b) for all adsorbents when comparing the Pb and S EDS maps. This observation agrees with results observed by Hamilton et al [48], Macías-García et al [49], and Li et al [50] in which it was observed that Pb chemically interacts with S during adsorption, forming strong surface complexes. It is also very interesting to note the strong correlation between the correlation coefficients and cosine similarities measured (Figure 6c), providing strong support for the validity of the observations in Figure 6a,b, since the correlation coefficients and cosine similarities were determined using completely different methods.…”

Section: Characterization Of Adsorbentssupporting

confidence: 93%

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Comparative Screening Study on the Adsorption of Aqueous Pb(II) Using Different Metabolically Inhibited Bacterial Cultures from Industry

Kpai,

Nel,

Haneklaus

et al. 2023

Water

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The global concern about the water pollution caused by heavy metals necessitates effective water treatment methods. Adsorption, with its substantial advantages, stands out as a promising approach. This study delves into the efficiency of Pb(II) removal using metabolically inhibited microbial cultures. These cultures encompass waste-activated sewage sludge (SS), industrially sourced bioremediation microbes (commercial 1—C1 and commercial 2—C2), an industrially acquired Pb(II) remediating consortium (Cons), and refined strains (derived from Cons) of Paraclostridium bifermentans (PB) and Klebsiella pneumoniae (KP). Our findings reveal maximum Pb(II) adsorption capacities of 141.2 mg/g (SS), 208.5 mg/g (C1), 193.8 mg/g (C2), 220.4 mg/g (Cons), 153.2 mg/g (PB), and 217.7 mg/g (KP). The adsorption kinetics adhere to a two-phase pseudo-first-order model, indicative of distinct fast and slow adsorption rates. Equilibrium isotherms align well with the two-surface Langmuir model, implying varied adsorption sites with differing energies. The Crank mass transfer model highlights external mass transfer as the primary mechanism for Pb(II) removal. Surface interactions between sulfur (S) and lead (Pb) point to the formation of robust surface complexes. FTIR analysis detects diverse functional groups on the adsorbents’ surfaces, while BET analyses reveal non-porous agglomerates with a minimal internal surface area. The Pb(II) recovery rates are notable, with values of 72.4% (SS), 68.6% (C1), 69.7% (C2), 69.6% (Cons), 61.0% (PB), and 72.4% (KP), underscoring the potential of these cost-effective adsorbents for treating Pb(II)-contaminated aqueous streams and contributing to enhanced pollution control measures. Nevertheless, optimization studies are imperative to evaluate the optimal operational conditions and extend the application to adsorb diverse environmental contaminants.

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Section: Characterization Of Adsorbentssupporting

confidence: 93%

Section: Characterization Of Adsorbentssupporting

confidence: 93%

Comparative Screening Study on the Adsorption of Aqueous Pb(II) Using Different Metabolically Inhibited Bacterial Cultures from Industry

Kpai,

Nel,

Haneklaus

et al. 2023

Water

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“…The water hardness level is determined by the concentrations of Ca 2+ and Mg 2+ in water [6] and can be classified into five grades based on the calcium carbonate content (Water Quality Association, WQA 2018), as summarized in Table 1. Chalcopyrite (CuFeS 2 ) is a common sulfide ore that is often associated with other sulfide ores such as molybdenite, galena, and sphalerite and clay gangue minerals [7][8][9][10]. When processing these ores, several minerals are typically mixed in the initial flotation step, followed by separation of the mixed flotation concentrate.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Water Hardness Level on Chalcopyrite Flotation Inhibition by the Disodium Carboxymethyl Trithiocarbonate

Wang

Shao

et al. 2023

Separations

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Disodium carboxymethyl trithiocarbonate (DCMT) is considered to have the potential to replace sulfide and cyanide as a new chalcopyrite inhibitor. However, the effect of its application in the industrial field is often not ideal, mainly because the flotation involves solid, liquid and gas three-phase flotation systems, leading to many influencing factors, especially the chemical changes in pulp caused by the liquid phase. In order to promote the industrial application DCMT, we studied the effect of water quality in the flotation liquid phase on the inhibition of DCMT on chalcopyrite. Water quality generally involves the physical, chemical and biological characteristics of water bodies. The water for beneficiation belongs to industrial water, and the main indicator of its water quality is the water hardness level. Flotation and contact angle studies showed that higher water hardness levels suppressed chalcopyrite inhibition by DCMT. Infrared and Raman spectra revealed that the free CO32− and Ca2+ in water coordinated with the residual organic chains on the surface of the pretreated chalcopyrite and was subsequently adsorbed onto the chalcopyrite surface. Moreover, the addition of DCMT dislodged the captured CO32− and Ca2+. X-ray photoelectron spectroscopy indicated that DCMT could adsorb on the chalcopyrite surface and compete with the Ca2+. When Ca2+ was trapped on the chalcopyrite surface, there were fewer adsorption sites available to the DCMT, resulting in a lower inhibition capacity. Simultaneously, the presence of DCMT promoted the release of Ca2+ from the chalcopyrite surface. Therefore, the influence of water quality must be considered when designing a flotation reagent system, and the water hardness level should be reduced to optimize the flotation process.

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The interactions of radioactive lead with sulphide minerals

Hamilton

Huai

Plackowski

et al. 2021

Applied Surface Science

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Lead adsorption on copper sulphides and the relevance to its contamination in copper concentrates

Cited by 11 publications

References 29 publications

Comparative Screening Study on the Adsorption of Aqueous Pb(II) Using Different Metabolically Inhibited Bacterial Cultures from Industry

Comparative Screening Study on the Adsorption of Aqueous Pb(II) Using Different Metabolically Inhibited Bacterial Cultures from Industry

Effect of the Water Hardness Level on Chalcopyrite Flotation Inhibition by the Disodium Carboxymethyl Trithiocarbonate

The interactions of radioactive lead with sulphide minerals

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