XPS studies of xanthate adsorption on pyrite

Effects of salinity on xanthate adsorption on sphalerite and bubble–sphalerite interactions

“…The C 1s peak II can also be attributed to CAO in adsorbed xanthate (Deng et al, 2013;Ikumapayi et al, 2012). The C 1s III is reported to be attributed to C@O (Hu et al, 2012) or hydrocarbon species on oxidized (insulating) mineral surfaces (Khmeleva et al, 2005), which is also close to the binding energy of solid CS 2 (Ranta et al, 1981) and dixanthogen (Szargan et al, 1992). Compared with the C 1s spectra of sphalerite treated in PAX with Milli-Q water and NaCl (Fig.…”

“…5b) also indicates that the binding energy of metal-deficient species is lower than that of the sulfur in xanthate, which suggests dixanthogen is involved in the adsorbed xanthate species, since the reported binding energy of dixanthogen (162.7-164.5 eV (Buckley et al, 2003;Ranta et al, 1981;Szargan et al, 1992)) is higher than that of chemisorbed xanthate and metal-xanthate, e.g. 162.6 eV for lead-xanthate (Buckley and Woods, 1990), 162.4-162.5 eV for copper-xanthate (Buckley et al, 2003;Mielczarski et al, 1996) and 162-162.3 eV for silver-xanthate (Buckley and Woods, 1995).…”

“…The first doublet corresponds to zinc sulfide (Hampton et al, 2011;Teng et al, 2012). The second doublet with a larger full-width at half-maximum (FWHM) is fallen into the binding energy region from 161.8 to 163.8 eV (Buckley and Woods, 1990;Ikumapayi et al, 2012;Khmeleva et al, 2006;Ranta et al, 1981;Szargan et al, 1992) for adsorbed collector species (chemisorbed xanthate, metal-xanthate or dixanthogen). The larger FWHM indicates the second doublet contains more than one component (Brienne et al, 1994).…”

“…elemental composition and chemical states. At low temperature $130 K, the detection of volatile species, such as dixanthogen (Szargan et al, 1992), is feasible via Cryo-XPS. The C 1s, O 1s and S 2p spectra of sphalerite samples treated in PAX with various salt concentrations are shown in Fig.…”

Adsorption of cationic cetylpyridinium chloride on pyrite surface

“…Au, Cr, Mo, Pd, Zn) [17][18][19][20][21] and radionuclides (Am) [22]. Researchers have conducted experiments on the adsorption of glucose for bacterial adhesion in bioleaching process [23], xanthate for froth floatation to separate minerals from coal and mine tailing piles [24], phospholipids for the inhibition of surface oxidation [25], and surfactants for chlorobenzene removal [26] to verify diverse reaction mechanisms of the chemical compounds on pyrite surfaces. Surface charge of an interface between adsorbent and adsorbate can be developed by release and uptake of the interfacial ions (H + , OH 2+ , O 2À and OH À ).…”