the term biomining have been coined to refer to the use of microorganisms in mining processes as in the biooxidation of refractory gold minerals. the biooxidation of refractory gold ores presents similar characteristics when compared with roasting and pressure oxidation. almost without exception, microbial extraction procedures are more environmentally friendly. the isolated bacteria in this st...

OBJECTIVES This cross-sectional study aimed at the environmental health hazards at work and cyanide exposure of small-scale gold miners engaged in gold extraction from ores in a mining area in the Philippines. METHODS Methods consisted of structured questionnaire-guided interviews, work process observation tools, physical health assessment by medical doctors, and laboratory examination and bl...

This study involved preliminary laboratory test work to identify the relative leaching response to cyanidation and thiourea leaching of an oxidized low grade gold ore based on characterization studies. Huge reserves of gold deposits have been reported from different parts of Iran, especially at Neishaboor area with gold grade of approx 4 ppm. For the mineralogical composition, the nature of the...

Different cyanogenic bacterial strains (Chromobacterium violaceum, Pseudomonas fluorescens, Bacillus megaterium) were cultivated under cyanide-forming conditions in the presence of metal-containing solids such as nickel powder or electronic scrap. All microorganisms were able to form water-soluble metal cyanides, however, with different efficiencies. C. violaceum was able to mobilize nickel as ...

The availability of Te is constrained by the production rate of its main parent compound (copper) and a debate is going on related to the potential supply of Te for very large scale CdTe PV deployment. However, recent investigations point to the existence of Te-rich ores in several places of the world that are likely to allow economic recovery of Te, independently of the production of copper. C...

Sulfide ores play an extremely important role in the development of mineral resource base Russia, as a source rare, non-ferrous, and precious metals. However, sulfide ore deposits is associated with risk dust explosions, oxidative processes that lead to spontaneous combustion ores. The article substantiates urgency solving problem reducing risks taking into account changes balance gold-sulfide ...