The effect of prolonged agitation in lead ion solution on ethylxanthate adsorption and surface characteristics of cerussite

Popov, S.R.; Vučinić, D.R.

doi:10.1016/0301-7516(92)90006-i

Cited by 13 publications

(2 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…XPS, as a sensitive surface technique, can identify the valence state and chemical composition of targeted elements on the measured mineral surface according to the difference in the binding The isoelectric point (IEP) value of cerussite without pretreatment of chloride ions was obtained as about pH 5.7 (see Figure 2), which was located at the values of pH 4.0 and 6.5 according to previous research [23][24][25]. The zeta potential decreased with the increase in pH values.…”

Section: Xps Studiesmentioning

confidence: 68%

The Effect of Chloride Ions on the Activity of Cerussite Surfaces

et al. 2016

View full text Add to dashboard Cite

Chloride ions were found to potentially increase activity of cerussite surfaces. Dissolution experiments, zeta potential measurements, X-ray photoelectron spectroscopy (XPS) studies, and density functional theory (DFT) computation were conducted in this study. Dissolution experiments showed that the lead ion concentrations in the NaCl solution system were lower than those in the deionized water system and that the lead ion concentrations in NaCl + Na 2 S aqueous systems decreased by approximately one order of magnitude compared with that in the Na 2 S system alone. Results of zeta potential measurements revealed that the pretreatment with chloride ions of cerussite caused a more positive zeta potential than that without chloride ions. XPS analysis results indicated that the number of lead ions on the mineral surface increased after cerussite was treated with chloride ions. Results of DFT computation implied that the number of lead atoms on the mineral surface increased and that the activity improved after PbCl + was adsorbed onto the cerussite surface. The contribution of chloride ions to the activity on the mineral surface is attributed to the increase in the number of active sites and enhancement in the activity of these sites, resulting in improved sulfidization and flotation performance.

show abstract

Section: Xps Studiesmentioning

confidence: 68%

The Effect of Chloride Ions on the Activity of Cerussite Surfaces

et al. 2016

View full text Add to dashboard Cite

show abstract

“…And some researchers considered that dissolved lead ions from the mineral lattice are beneficial for cerussite flotation, because lead ions in pulp solution may be hydrolyzed to form various lead-ion species and adsorbed or readsorbed on the mineral surface. Then surface ion-exchange reaction have been conducted between adsorbed hydrolysed lead ions and EX-, leading to the formation of nonstoichiometric lead xanthate, which provides improved conditions for better cerussite flotation [3][4][5]. Additionally, it is not doubt that the dissolution of cerussite is also detrimental, because it will increase the lead ions concentration in groundwater and soil.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Calculation of Dissolution Equilibrium for Cerussite in Pulp Solution

Feng

Wen

Cao

et al. 2014

AMR

View full text Add to dashboard Cite

The dissolution equilibrium of cerussite within the entire pH range was theoretically calculated, which was based on coordination chemistry, thermodynamics and the mass balance principle of Pb2+ and CO32- in pulp solution. The calculation result showed that the total lead concentration (CPbT) of cerussite decreased significantly with increasing pH below 6 or so; however, at pH of about 10, a reverse trend of CPbT may be observed. Within the pH range from 6 to 10, the CPbT of cerussite remained close and presents a minimum value of around 10-4 mol/L. This paper may provide a theoretical basis for the dissolution process of cerussite and its conditioning stage before benefication by adopting flotation method.

show abstract