![xps peak sulphur s2p xps peak sulphur s2p](https://www.researchgate.net/profile/Vladimir-Hlady/publication/281211875/figure/fig3/AS:464944664715267@1487862854378/XPS-spectra-of-the-C1s-carbon-peak-a-and-S2p-sulfur-peak-b-showing-the-changes-of-C-C_Q320.jpg)
Evidence of microbial cells adhesion at mineral surfaces was also produced: carbon and nitrogen were revealed by CHNS, and nitrogen was also detected on the bioleached surfaces by XPS.
![xps peak sulphur s2p xps peak sulphur s2p](https://www.researchgate.net/profile/Wook-Ahn/publication/273160442/figure/fig4/AS:370758581800963@1465407142224/The-C-1s-XPS-spectra-of-a-CDC1200-b-S-CDC1200-composite-and-the-S2p-XPS-spectra.png)
On the surfaces of the mineral residue particles, elemental sulphur as reaction intermediate of the leaching process and precipitated secondary phases (Fe–OOH and jarosite), together with adsorbed arsenates, was detected. After bioleaching, no signals of iron, arsenic and sulphur originating from pyrite and arsenopyrite were detected, confirming a strong oxidation and the dissolution of the particles. they were collected for getting the peak fitting parameters and apply them. Note that Auger electron peaks are also generated, and these peaks are labeled as the LMM transition. The spin-orbit splitting ratio is 1:2 for p levels, 2:3 for d levels and 3:4 for f levels. not only of the S2p XP-spectra but also of the SKLL spectra. Thus, XPS peaks for As will be represented as 3s (a single peak)., 3p 1/2 or 3p 3/2, or 3d 3/2 or 3d 5/2. noticeable shift in the binding energy of the oxygen and sulfur peaks. The chemical state of the main elements (Fe, As and S) at the surface of the bioreactor feed particles and of the residue after bioleaching was investigated by X-ray photoelectron and X-ray excited Auger electron spectroscopy. The knowledge of sulphur chemical state is important in order to clarify the mechanisms of oxidation/dissolution and precipitation reactions also in biotic conditions on the surface of these minerals. X-ray photoelectron spectroscopy (XPS) - a powerful surface analysis tool - has. The flotation concentrate was a mixture of pyrite (FeS2) and arsenopyrite (FeAsS) after bioleaching, 95% of the initial content of pyrite and 85% of arsenopyrite were dissolved. 6 times higher in the case of the electrode modified with. The voltammetric integrated charge corresponding to the cathodic peak of the Pani-PSS component is ca. A good fit of the signal is obtained using two double peaks indicating two different chemical environments of the sulphur atoms. The sulphur signal (S2p) in Pani-PSS-containing samples appears at about 169 eV and can be fitted to a set of. XPS spectrum of the sulphur peak of the SAM layer. X-ray diffraction, X-ray photoelectron spectroscopy (XPS) and X-ray-induced Auger electron spectroscopy mineral surfaces investigations, along with inductively coupled plasma-atomic emission spectroscopy and carbon, hydrogen, nitrogen and sulphur determination (CHNS) analyses, were carried out prior and after bioleaching. S2p, C1s, N1s and Zn2p core regions of XPS spectra of solid Pani. Based on such improved XPS analyses, the binding energies (BEs) of S2p signals for sulfur of increasing oxidation state are determined to be 166-167.5 eV for SO in dimethyl sulfoxide, 168.1 eV for SO2 in polysulfone, 168.4 eV for SO3 in polystyrene sulfonate and 168.8 eV for SO4 in chondroitin sulfate. XPS core level spectra and Auger parameters for some silver compounds. In this work, a multi-technical bulk and surface analytical approach was used to investigate the bioleaching of a pyrite and arsenopyrite flotation concentrate with a mixed microflora mainly consisting of Acidithiobacillus ferrooxidans. parameters (S2p 3 2 -S KL23L23) for about sixty sulfur-containing compounds. Arsenopyrite and pyrite bioleaching: evidence from XPS, XRD and ICP techniques Arsenopyrite and pyrite bioleaching: evidence from XPS, XRD and ICP techniquesįantauzzi, Marzia Licheri, Cristina Atzei, Davide Loi, Giovanni Elsener, Bernhard Rossi, Giovanni Rossi, Antonella