Gold mining and processing is an activity with large environmental impact due to the low concentration of gold in ore deposits chemical resistance most chemicals. Over 75% leached from ores using cyanide, however less toxic lixiviants have been proposed literature. Thiosulfate one these alternative reagents, but high reagent consumption has slowed acceptance operations. Reducing cost thiosulfat...

Flotation wastes are becoming a valuable secondary raw material and source of many metals semimetals worldwide with the possibilities industrial recycling. The flotation tailings contain oxide sulfide minerals that have not been sufficiently stabilized form acidic mine waters, which in turn contaminate groundwater, rivers, reservoi6sediments. An effective way to recycle these is recover through...

Abstract: In heap bioleaching, metal is dissolved from ore by a percolating solution, catalysed by naturally occurring bacteria. Increased interest in the technology motivated the development of accurate models of such process in recent years. In contrast, the utilisation of such models for control has received limited attention, given their high mathematical complexity. This paper presents a l...

In this paper, we for the first time show the ability of the mesophilic fungus Fusarium oxysporum in the bioleaching of waste material such as Fly-ash for the extracellular production of highly crystalline and highly stable, protein capped, fluorescent and water soluble silica nanoparticles at ambient conditions. When the fungus Fusarium oxysporum is exposed to Fly-ash, it is capable of selecti...

The Atacama Desert in Chile is well known for being the driest and oldest desert on Earth. For these same reasons, it is also considered a good analog model of the planet Mars. Only a few decades ago, it was thought that this was a sterile place, but in the past years fascinating adaptations have been reported in the members of the three domains of life: low water availability, high UV radiatio...

Abstract In modern societies, the accumulation of vast amounts waste Li-ion batteries (WLIBs) is a grave concern. Bioleaching has great potential for economic recovery valuable metals from various electronic wastes. It been successfully applied in mining on commercial scales. WLIBs can not only recover but also prevent environmental pollution. Many acidophilic microorganisms (APM) have used bio...