Electrochemistry of Sulfides: Process and Environmental Aspects

Abstract

One of the main sources of non-ferrous and precious metals is sulfide ores. This paper presents a review of the existing literature on the electrochemical properties of some of the most common industrial sulfides, such as pentlandite, chalcopyrite, sphalerite, galena, pyrrhotite, pyrite, etc. The study results of the surface redox transformations of minerals, galvanic effect, cathodic oxygen reduction reaction on the surface of sulfides are presented. The electrochemical properties of sulfide minerals are manifested both in the industrial processes of flotation and hydrometallurgy and in the natural geological setting or during the storage of sulfide-containing mining, mineral processing, and metallurgical industry waste.

Investigation of the Solubility of Elemental Sulfur (S) in Sulfur-Containing Natural Gas with Machine Learning Methods

“…Changes in sulfur solubility are accompanied by the generation of different products: As the equilibrium moves toward the production of polyhydrogen sulfide, the solubility of elemental sulfur in natural gas increases, and the amount of H 2 S decreases. The reaction proceeds in the reverse direction: sulfur solubility decreases and promotes the production of H 2 S. Based on the dissolution pattern of sulfur, researchers can control the production of H 2 S. H 2 S is a highly toxic gas that can negatively impact the environment and biosecurity [ 4 ]. For example, it can acidify the soil, freshwater, and marine ecosystems, making forests more susceptible to frost, drought, and insect infestation.…”

Control of Non-Ferrous Metal-Sulfide Minerals’ Flotation via Pulp Potential

“…The application of potential as a flotation-controlling parameter has been broadly proposed in the literature [30,[39][40][41][42][43]. However, the number of publications showing real industrial examples is not very high, although some very useful papers can be referenced [44][45][46][47][48].…”