Results 181 to 190 of about 3,405 (219)

Arsenopyrite Oxidation with Ozone: Stoichiometry and Kinetics

Ozone: Science & Engineering, 2018
When the recovery of precious metals by standard cyanidation is less than 80%, the ore is classified as refractory and needs an oxidizing pretreatment before cyanidation. Arsenopyrite is one of the main sulfide matrixes where occurs refractory gold. In this work, the arsenopyrite leaching in acid media was studied using ozone as an oxidizing agent. The
C. Rodríguez-Rodríguez, F. Nava-Alonso, A. Uribe-Salas   +2 more
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[Identification of realgar and arsenopyrite and their sublimates].

Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica, 2001
In this paper, two traditional Chinese medicinal minerals realgar and arsenopyrite, as well as their sublimates are identified in their nature, physical and optical properties, chemical compositions and trace elements. The result has shown that there are marked differences among realgar, arsenopyrite and their sublimates, and it should be particularly ...
F, Li, L, Li, Y, Han
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Electrochemical Contribution of Pyrite in Arsenopyrite Reactivity

ECS Meeting Abstracts, 2006
Abstract not Available.
Gustavo Urbano, Victor Esteban Reyes-Cruz, MarcA Aurora Veloz, Ignacio Gonzlez   +3 more
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Oxidation Mechanism of Arsenopyrite in the Presence of Water

The Journal of Physical Chemistry C, 2017
Arsenopyrite is commonly present in mining tailings and, together with pyrite, is responsible for acid rock drainage (ARD) phenomenon. The mineral undergoes oxidation in contact with oxygen and water producing a solution containing acid and heavy metals and, hence, causing important environmental impacts. Density functional/plane wave calculations were
Juliana C. M. Silva, Egon C. dos Santos, Thomas Heine, Heitor A. De Abreu, Hélio A. Duarte   +4 more
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Electrochemical behavior of arsenopyrite in alkaline media

Mining, Metallurgy & Exploration, 1991
Electrochemical oxidation of arsenopyrite (FeAsS) has been investigated as an attempt to gain a better understanding of its dissolution chemistry. Rest potential measurements, cyclic voltammetry and constant potential experiments were conducted in the pH range from 8 to 12 in the absence and the in the presence of cyanide.
V. M. Sanchez, J. B. Hiskey
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Sulfate-accelerated photochemical oxidation of arsenopyrite in acidic systems under oxic conditions: Formation and function of schwertmannite

Journal of Hazardous Materials, 2022
Lihu Liu, Zengping Ning, Chengshuai Liu   +2 more
exaly  

Synergistic oxidation of dissolved As(III) and arsenopyrite in the presence of oxygen: Formation and function of reactive oxygen species

Water Research, 2021
Lihu Liu, Zengping Ning, Chengshuai Liu   +2 more
exaly  

New Semiconducting Arsenopyrite-type Compounds

Nature, 1964
IN a recent paper1 we reported on semiconductivity in CoSb2-type compounds. The ternary analogues of these polycompounds are formed by the arsenopyrite group. The monoclinic minerals arsenopyrite, FeAsS, and gud-mundite, FeSbS, closely correspond to the mineral safflorite, CoAs2.
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Effect of calcium ions on surface properties of chalcopyrite and arsenopyrite and its response to flotation separation under low-alkalinity conditions

Applied Surface Science, 2022
Yuqin Xia, Hanyu Zhou, Bingqiao Yang
exaly  

Arsenopyrite

Geology Today, 2002
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