Results 11 to 20 of about 4,445 (173)

Pyrite-promoted dissolution of arsenopyrite in the presence of Sulfobacillus thermosulfidooxidans

Journal of Materials Research and Technology, 2020
The weathering of arsenopyrite in mine wastes is crucial for the formation of arsenic-containing acid mine drainage (AMD). Arsenopyrite is always associated with pyrite.
Sha Deng, Guoshuai He, Wu Bichao, Gu Guohua   +3 more
doaj   +1 more source

Carrier-microencapsulation of arsenopyrite using Al-catecholate complex: nature of oxidation products, effects on anodic and cathodic reactions, and coating stability under simulated weathering conditions

Heliyon, 2020
Mining activities often generate large amounts of sulfide-rich wastes containing arsenopyrite (FeAsS), which when dissolved releases toxic arsenic (As) and generates acid mine drainage (AMD) that are both disastrous to the environment.
Ilhwan Park, Carlito Baltazar Tabelin, Kensuke Seno, Sanghee Jeon, Hiroyuki Inano, Mayumi Ito, Naoki Hiroyoshi   +6 more
doaj   +1 more source

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

Application of EPMA and LA-ICP-MS to Study Mineralogy of Arsenopyrite from the Haoyaoerhudong Gold Deposit, Inner Mongolia, China

Yankuang ceshi, 2022
BACKGROUND The composition of major and trace elements in arsenopyrite can be used to identify the occurrence of elements and explore the remobilization and migration behaviour of elements in different stages.
YUN Yuanjiao, FAN Chenglong, LYU Xiping, SHI Zhefeng, DOU Zhihui, WANG Yitian, WANG Mengqi, YE Huishou   +7 more
doaj   +1 more source

SPECIATION FEATURES OF GOLD IN ORES AND MINERALS OF THE NATALKINSKOE DEPOSIT (NORTH-EAST RUSSIA)

Геодинамика и тектонофизика, 2022
The distribution and speciation features of gold in ores and minerals of the Natalkinskoe gold deposit (North-East Russia) are studied using light microscopy (LM), scanning electron microscopy with energy dispersive X-ray spectrometry (SEM-EDX), X-ray ...
R. G. Kravtsova, A. S. Makshakov, V. L. Tauson, O. Yu. Belozerova, V. V. Tatarinov   +4 more
doaj   +1 more source

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