Copper is an essential nutrient for life, but at the same time, hyperaccumulation of this redox-active metal in biological fluids and tissues is a hallmark of pathologies such as Wilson's and Menkes diseases, various neurodegenerative diseases, and toxic environmental exposure. Diseases characterized by copper hyperaccumulation are currently challenging to identify due to costly diagnostic tool...

The article presents the results of laboratory studies on ore flotation copper-molybdenum deposits in East Kazakhstan region using a combined reagent. It is required to use new beneficiation methods and reagents increase efficiency minerals improve processing finely disseminated ores. problem can be solved by combination different collectors. objective research recovery copper molybdenum during...

Acidithiobacillus ferrooxidans strain D3-2, which has a high copper bioleaching activity, was isolated from a low-grade sulfide ore dump in Chile. The amounts of Cu(2+) solubilized from 1% chalcopyrite (CuFeS(2)) concentrate medium (pH 2.5) by A. ferrooxidans strains D3-2, D3-6, and ATCC 23270 and 33020 were 1360, 1080, 650, and 600 mg x l(-1) x 30 d(-1). The iron oxidase activities of D3-2, D3...

A defined mesophilic consortium including an iron oxidizing bacterium and a sulfur oxidizing bacterium was constructed to evaluate its ability for bioleaching a flotation concentrate from Andacollo mine in Neuquén, Argentina. Experiments were performed in shake flasks with a pulp density of 10% (w/v), using a basal salt medium containing ferrous iron at pH 1.8. The leaching solutions were analy...

The recovery and concentrate grade, used simultaneously, are the most widely accepted measures of assessing metallurgical performance. Meanwhile, new challenges are being found with more complex ores around the world, a new methodology to evaluate flotation circuits more accurately is used to keep the Mineral Industry afloat in a changing world by increasing revenues. The flotation process is d...

The conventional cyanide leaching process is used to extract gold from a high copper concentrate. Because the associated minerals consume sodium in large quantities, cost of reagents and economic benefit not ideal. At same time, number tail slag are produced, which brings series environmental problems. In order solve problems caused by excessive consumption cyanogen slag, feasibility thiosulfat...

Root-zone temperatures (RZT) in relation to Cu and Zn uptake and tissue accumulation, and to total biomass, in potato plants (Solanum tuberosum L. var. Spunta) were studied. Using five different plastic mulches (no cover, transparent polyethylene, white polyethylene, coextruded white-black polyethylene, and black polyethylene) resulted in significantly different RZT (16, 20, 23, 27, and 30 degr...

In the established technologies, use of classic depressants pyrite, such as lime represents one main problems in flotation gold-bearing copper (Cu) ores. Lime addition leads to depression noble metals - gold (Au) and silver (Ag) that end up tailings. Thus, operator incurs economic losses. The current paper presents research aimed at replacing pyrite ore, bearing silver, classical depressor with...