Study of flotation conditions for cadmium(II) removal from aqueous solutions

Mahmoud, Mamdoh R.; Lazaridis, Nikolaos; Matis, K. A.

doi:10.1016/j.psep.2014.06.012

Cited by 56 publications

(15 citation statements)

References 35 publications

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“…Removal of cadmium ion from aqueous solutions has been recently investigated by precipitate flotation; the so‐called ‘first‐kind’ and the ‘second‐kind’ techniques were tested . Above pH 7.5 according to aqueous speciation, cadmium starts to precipitate out as hydroxide and thus, its tendency to form complexes with potassium ethyl xanthate was reduced.…”

Section: Applications and Discussionmentioning

confidence: 99%

A perspective on flotation: a review

Peleka

Gallios

Matis

2017

J of Chemical Tech & Biotech

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The problem of fine particles processing has become important both in mineral processing and also for water and wastewater engineering. It is accepted, on the other hand, that the bubble–particle collection efficiency increases with decreasing bubble size. A decrease in bubble size can be obtained using different methods (dispersed‐air, where electroflotation is included, and/or dissolved‐air flotation), as discussed. Following an introduction of the subject, older laboratory results are presented in this review paper (based on 4 decades of experience), explaining the above, giving further ideas and possibly, assisting future researchers in the area. Examples given are: separation of fine mineral particles (such as pyrite and magnesite), and of metal ions (as chromium, arsenic, copper, zinc, germanium and so on); among the various available techniques, mention is given to ion, precipitate, adsorbing colloid, sorptive and biosorptive flotation ‐ including certain comparisons for the same application. The metal ion flotation application deserves further study and work, mainly for selective removal. © 2017 Society of Chemical Industry

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Section: Applications and Discussionmentioning

confidence: 99%

A perspective on flotation: a review

Peleka

Gallios

Matis

2017

J of Chemical Tech & Biotech

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“…5−14 Xanthates have been proposed as capping ligands in the synthesis of metal nanoparticles and self-assembled monolayers alternative to thiols. 14−16 Xanthates of alkali metals are widely used for the precipitation and separation of heavy metals in mineral processing, hydrometallurgy, water treatment, analytical practice, 1,17,18 and, first of all, as collectors in froth flotation of metal sulfide ores. 19 Water-insoluble xanthates of lead, copper, and some other metals likely emerge as colloidal or surface species in the reaction between the xanthate collector and aqueous cations in the flotation slurries, and their interaction with mineral surfaces is important for understanding the flotation mechanisms and performance.…”

Section: Introductionmentioning

confidence: 99%

Colloidal and Immobilized Nanoparticles of Lead Xanthates

et al. 2019

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Although nanoparticles of heavy metal xanthates and their hydrosols can play important roles in froth flotation, environmental issues, analytics, and manufacturing of metal sulfide nanocomposites, they have received little attention. We studied colloidal solutions and immobilized particles prepared via interaction of aqueous lead nitrate with alkyl xanthates applying UV–vis absorption spectroscopy, dynamic light scattering, zeta potential measurement, thermogravimetry analysis, Fourier transform infrared spectroscopy, Raman scattering, X-ray photoelectron spectroscopy, atomic force microscopy, and transmission electron microscopy. The hydrodynamic diameter of colloidal particles of Pb(SSCOR) 2 decreased from 500 to 50 nm with an increase in the alkyl radical length and the initial xanthate to lead ratio (X/Pb); the zeta potential magnitude varied similarly, although it remained negative. The effect of pH in the range of 4.5–11 was minor, but the colloids produced using excess of Pb 2+ in alkaline media were close to PbX and decomposed much easier than PbX 2 . The uptake of lead xanthates on supports was generally low because of negative charges of the colloids; however, 50–100 nm thick PbX 2 films were deposited on PbS and SiO 2 from the media of X/Pb < 2 and pH < 9 because of preadsorption of Pb 2+ , while nanorods formed on highly oriented pyrolytic graphite.

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“…Metal xanthates, salts of the O-esters of carbonodithioic acids and the corresponding O,S-diesters ROCSSH, where stands for alkyl chain R (ethyl-, propyl-, butyl-, etc. ), are widely used as collectors in the froth flotation of metal sulfide ores, reagents for heavy metal sedimentation in hydrometallurgy and wastewater treatment, in cellulose synthesis, as vulcanization accelerators in rubber industry, and some others [1][2][3][4][5][6][7][8][9]. Cytotoxic activity of metal xanthates on human cancer cell has been found [10,11], however, testing of some compounds, including copper xanthates, has been retarded due to their low solubility [11].…”

Section: Introductionmentioning

confidence: 99%