Results 11 to 20 of about 3,405 (219)

CHEMICAL SPECIATION OF GOLD IN ARSENOPYRITE [PDF]

The Canadian Mineralogist, 2000
The speciation of Au in gold-bearing arsenopyrite (FeAsS) from four gold deposits (Olympiada, Sentachan, Sao Bento and Sheba) was determined by micro-X-ray absorption near-edge structure (XANES) on grains well characterized microscopically and by electron-microprobe and secondary-ion mass spectrometry analyses and images.
Mcmahon, Greg, Cabri, L J, Newville, M, Gordon, R A, Crozier, E D, Sutton, S R, McMahon, G, Jiang, D T   +7 more
openaire   +3 more sources

Formation of surface protective coatings on arsenopyrite using Al-catecholate complex and its mode of inhibition of arsenopyrite oxidation [PDF]

MATEC Web of Conferences, 2019
Arsenopyrite is the most common arsenic-bearing sulfide mineral in nature. It is readily oxidized and releases toxic arsenic (As) into the environment when exposed to atmospheric conditions via anthropogenic activities like mining, mineral processing ...
Park Ilhwan, Tabelin Carlito, Inano Hiroyuki, Seno Kensuke, Higuchi Kazuki, Ito Mayumi, Hiroyoshi Naoki   +6 more
doaj   +2 more sources

Stability and solubility of arsenopyrite, FeAsS, in crustal fluids [PDF]

Geochimica et Cosmochimica Acta, 2002
The stability and solubility of natural arsenopyrite (FeAsS) in pure water and moderately acid to slightly basic aqueous solutions buffered or not with H2 and/or H2S were studied at temperatures from 300 to 450°C and pressures from 100 to 1000 bar. The solubilities of FeAsS in pure water and dilute HCl/NaOH solutions without buffering are consistent ...
Pokrovski, Gleb S., Kara, Sami, Roux, Jacques   +2 more
openaire   +3 more sources

Common misconceptions in crystallography and crystal optics. [PDF]

J Appl Crystallogr
Six recurrent misconceptions in crystallography, some involving mineral and crystal optics, are analyzed and discussed. The explanation of these and similar misconceptions could serve as educational resources for teachers.Did you know that an X‐ray diffraction pattern is not a spectrum?
Casas L.
europepmc   +2 more sources

Phase relations of arsenian pyrite and arsenopyrite

, 2021
Arsenian pyrite containing above 1 wt% As plays a crucial role in deposition and deportment of Au and other chalcophile elements. The importance of arsenian pyrite led to theoretical and experimental studies that examined properties and genesis of the ...
Large, Ross R., Goemann, Karsten, Meffre, Sebastien, Kiseeva, Ekaterina S., Danyushevsky, Leonid V., Zhukova, Irina, Belousov, Ivan A., Stepanov, Aleksandr S.   +7 more
core   +2 more sources

Arsenic content in the lead flotation concentrate in dependence on NaCN dosage [PDF]

Mining and Metallurgy Engineering Bor, 2013
Flotation properties of arsenopyrite are similar to the flotation properties of pyrite. Specifically, in the alkaline conditions (pH value of pulp 7-11) and in the presence of xanthates as collectors, arsenopyrite can easily pass into concentrate ...
Magdalinović Srđana, Jovanović Ivana, Ljubojev Vesna   +2 more
doaj   +1 more source

Enhancement of arsenopyrite bioleaching by different Fe(III) compounds through changing composition and structure of passivation layer

Journal of Materials Research and Technology, 2020
Ferric iron has a significant effect on the bioleaching of arsenopyrite, the most efficient way for pretreatment of arsenopyrite-bearing gold ores. Up to date, the differential effect of Fe(III) compounds on that process was rarely studied. Herein, FeCl3,
Yu Deng, Duo-rui Zhang, Jin-lan Xia, Zhen-yuan Nie, Hong-chang Liu, Na Wang, Zhen Xue   +6 more
doaj   +1 more source

Advances in the Separation of Pyrite and Arsenopyrite by Oxidative Flotation

Kuangchan zonghe liyong, 2023
This is an essay in the field of mineral processing engineering. Pyrite and arsenopyrite are common associated sulfides. Because their crystal structures and surface properties are very similar, their flotation separation has been an important research ...
Zipei Jia, Xiangyu Song, Wen Wang, Laifu Xu, Hongtao Zhang   +4 more
doaj   +1 more source

Arsenopyrite Bio-Oxidization Behavior in Bioleaching Process: Evidence From Laser Microscopy, SEM-EDS, and XPS

Frontiers in Microbiology, 2020
In arsenopyrite bioleaching, the interfacial reaction between mineral and cells is one of the most important factors. The energy of the interface is influenced by the mineralogical and microbiological characteristics.
Lu Yin, Lu Yin, Hong-ying Yang, Hong-ying Yang, Lin-lin Tong, Lin-lin Tong, Peng-cheng Ma, Qin Zhang, Qin Zhang, Miao-miao Zhao, Miao-miao Zhao   +10 more
doaj   +1 more source

Carrier-microencapsulation using Al-catecholate complex to suppress arsenopyrite oxidation: Evaluation of the coating stability under simulated weathering conditions [PDF]

MATEC Web of Conferences, 2019
Arsenopyrite (FeAsS) is the most common primary arsenic-sulfide mineral in nature, and its oxidation causes the release of toxic arsenic (As). To mitigate these problems, carrier-microencapsulation (CME), a technique that passivates sulfide minerals by ...
Seno Kensuke, Park Ilhwan, Tabelin Carlito, Magaribuchi Kagehiro, Ito Mayumi, Hiroyoshi Naoki   +5 more
doaj   +1 more source