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Kinetics of cupric leaching of pyrite in 4 M NaCl solutions Cinétique de la lixiviation cuivrique de la pyrite dans des solutions de NaCl 4M
(Taylor & Francis, 2020)
Cupric chloride leaching is an attractive alternative for the treatment of pyritic refractory gold ores. In this context, the kinetics of pyrite dissolution was studied in cupric chloride solutions containing 4 M NaCl. ...
Solubility of gold in arsenian pyrite
(PERGAMON-ELSEVIER SCIENCE LTD, 2005-06-01)
Although Au and As can be enriched up to the weight percent level in arsenian pyrite, there is little knowledge of their limiting concentrations and nature of incorporation. This study reports SIMS and EMPA analyses showing ...
First-principles calculations of the thermodynamic mixing properties of arsenic incorporation into pyrite and marcasite
(ELSEVIER, 2006-01-31)
The thermodynamic mixing properties of As into pyrite and marcasite have been investigated using first-principles and Monte Carlo calculations in order to understand the incorporation of this important metalloid into solid ...
A study of the main oxidation products of natural pyrite by voltammetric and photoelectrochemical responses
(Elsevier B.V., 2001-03-01)
(Photo)electrochemical experiments on pyrite electrodes in acetic acid-acetate buffer (pH = 4.5) are conducted to clarify the main oxidation reactions and the nature of the products. Electrochemical reactions in the -0.40 ...
Trace metal pyritization variability in response to mangrove soil aerobic and anaerobic oxidation processes
(Pergamon-Elsevier Science Ltd., 2014-01)
The degree of iron pyritization (DOP) and degree of trace metal pyritization (DTMP) were evaluated in mangrove soil profiles from an estuarine area located in Rio de Janeiro (SE Brazil). The soil pH was negatively correlated ...
Biodepression of pyrite using Acidithiobacillus ferrooxidans in seawater
(Elsevier, 2018)
In Cu-Mo deposits it is usual to find considerable amounts of pyrite (FeS2). When processing this kind of ore by flotation, pyrite is rejected using lime to increase the pH to alkaline conditions (pH similar to 10-12). In ...
Constraints on the solid solubility of Hg, Tl, and Cd in arsenian pyrite
(Mineralogical Society of America, 2016)
Arsenic-rich (arsenian) pyrite can contain up to tens of thousands of parts per million (ppm) of toxic heavy metals such as Hg, Tl, and Cd, although few data are available on their solid solubility behavior. When a compilation ...
Biodepression of copper-activated pyrite with acidithiobacillus ferrooxidans in flotation with fresh and seawater
(MDPI, 2021)
Acidithiobacillus ferrooxidans has been shown to be a good depressant of pyrite in freshwater and seawater flotation. However, the effect of these bacteria over copper-activated pyrite has not been studied. At the industrial ...
The electrochemical behavior of pyrite-pyrrhotite mixtures
(Elsevier B.V., 2003-08-30)
To assess the response of common sulfide minerals to oxidizing conditions, a methodology to immobilize mechanically solid particles on carbon surfaces (voltammetry of microparticles, VMP) was employed, to define the influence ...
The electrochemical behavior of pyrite-pyrrhotite mixtures
(Elsevier B.V., 2003-08-30)
To assess the response of common sulfide minerals to oxidizing conditions, a methodology to immobilize mechanically solid particles on carbon surfaces (voltammetry of microparticles, VMP) was employed, to define the influence ...