Physical-chemical study of IPETC and PAX collector's adsorption on covellite surface
No Thumbnail Available
Access rights
openAccess
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
Date
2022-11-15
Major/Subject
Mcode
Degree programme
Language
en
Pages
Series
Applied Surface Science, Volume 602
Abstract
The adsorption mechanisms of the collectors O-isopropyl-N-ethyl thionocarbamate (IPETC) and potassium amyl xanthate (PAX) on a covellite surface were studied through microflotation tests, Fourier-transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and density functional theory (DFT) calculations. The microflotation test demonstrated that the collectors have a marked effect on the covellite flotation and that covellite flotation is not pH-dependent. The FT-IR spectra for covellite treated with IPETC and PAX collectors at pH 8 and 11 does not differ significantly. For IPETC, the leading adsorption –C(=S) –NH group vibration was identified, and the NH stretching band is absent from both spectra. The spectra show the frequencies for the PAX, Cu-amylxanthate (CuAX), and (AX)2 dixantogen that formed. The XPS spectra showed that the adsorption mechanism of PAX on the covellite surface is principally through C 1 s and S 2p. The adsorption mechanism of IPETC on the covellite surface suggests that the bond is enabled through the[dbnd]S element of the collector with Cu atoms in the covellite surface. Finally, the DFT calculations predict that for IPETC the bond with copper only occurred through the C[dbnd]S group. For PAX, the bond with copper occurred through the C[dbnd]S and C–S groups.Description
Publisher Copyright: © 2022 Elsevier B.V.
Keywords
Amyl xanthate, Collector adsorption, Covellite, Density functional theory, Thionocarbamate
Other note
Citation
Botero, Y L, Canales-Mahuzier, A, Serna-Guerrero, R, López-Valdivieso, A, Benzaazoua, M & Cisternas, L A 2022, ' Physical-chemical study of IPETC and PAX collector's adsorption on covellite surface ', Applied Surface Science, vol. 602, 154232 . https://doi.org/10.1016/j.apsusc.2022.154232