— The most known application for this technology is the bio-oxidation of copper sulphides from primary resources, but opportunities in the mining industry will target too the processing of secondary resources, such as tailings, slag, concentrates and dumps as well as run of mine and crushed low-grade ore material, with an increasingly positioning of …

 — Harnessing microbes to do mining work is called biomining, or sometimes bioextraction or bioleaching. The strategy has been most extensively studied for copper and gold: Colorado-based mining ...

 — The ore samples collected from Dexing coper mine (named as DX), Zijin copper mine (ZJ) and Luanshya copper mine (LS) were ground to less than 74 μm in diameter. ... The microbial community structure changed significantly, accompanied by decreased richness and diversity with increased Cu content. Interestingly, ...

 — This review examines and compare strategies and processes involving microorganisms for critical metals recovery, since conventional physico-chemical …

Microbial mystery. Biomining in general is much slower than conventional processing techniques. ... where nickel and zinc are extracted from polymetallic black schist ore by heap bioleaching. The mine began operating in 2009 and in 2013 produced around 9000 tonnes of nickel and 17,000 tonnes of zinc.

Here, we report the environmental extraction and conversion of CuSO 4 ions into single-atom zero-valent copper (Cu 0) by a copper-resistant bacterium isolated from a copper mine in Brazil. Furthermore, the …

 — 1. Introduction. The copper mine industry is facing with the need to process low-grade ores using low-cost technologies to meet global demand unceasingly (Faramarzi et al., 2020).As an economical and environmental friendly method, bioleaching has been exploited to liberate metals, such as copper, iron and nickel, from low-grade ores in …

 — Microbial activity in mine waste can be limited by the availability of these essential nutrients (Craw & Rufaut, 2017; Rashid et al., 2016). Some bacteria and archaea can fix N 2 from the atmosphere, while other microbes require it in other forms such as ammonium, nitrate or organic N. Most microbes require P in the form of soluble inorganic ...

 — The objective of this study was to improve the efficiency of microbial desulphurization of sulfide ore by pretreatment with ultrasonic and microwave techniques. Different combinations of ultrasound and microwave were used to pretreat the sulfide ore and compare the microbial desulphurization effect of the treated ore and the raw ore.

 — The Zijinshan Copper Mine in Fujian Province, China (Table 1), illustrates the extreme conditions that can occur in secondary copper sulfide bioleach operations (Ruan et al. 2011).Zijinshan ore contains a high concentration (5.8 %) of pyrite (FeS 2).The main copper sulfide minerals are digenite/chalcocite (0.23 %), covellite (0.2 %), and enargite …

 — Full-scale deployment of this approach for low-grade run-of-mine (ROM) ore in Dump 2 at the mine received a positive environmental assessment from the …

 — The complexity of microbial communities and their responses to changing environmental conditions pose challenges in monitoring and managing microbial activities at mining waste sites. Monitoring microbial activity necessitates the use of complex molecular techniques, which can be both expensive and time-consuming.

 — Bio-extractive techniques have to compete with alternative approaches for extracting metals from ores and concentrates. Some, such as pyrometallurgical technologies (ore roasting/smelting) have been refined over millennia and often represent major investments by mining companies, while others, such as pressure leaching, are …

Data Descriptor: A metagenomic survey of soil microbial communities along a rehabilitation chronosequence after iron ore mining Markus Gastauer1, Mabel Patricia Ortiz Vera1,2, Kleber Padovani de ...

Bioleaching (or biomining) is a process in mining and biohydrometallurgy (natural processes of interactions between microbes and minerals) that extracts valuable metals from a low-grade ore with the help of …

 — Biomining is an increasingly applied biotechnological procedure for processing of ores in the mining industry (biohydrometallurgy). Nowadays the production of copper from low …

 — Microbial communities and activities in multi-lift bioleaching heap of copper sulfide ore were investigated at Monywa copper mine, Myanmar. The high-throughput sequencing method revealed a microbial community dominated by archaeal Ferroplasma (about 70%), rather than more commonly reported genera of Acidithiobacillus and …

 — Ecological engineering of tailings has been advocated to change tailings' mineralogy, improve physicochemical properties, and accelerate soil formation (i.e. pedogenic processes), allowing the re-colonisation of microbial communities and pioneer plant species (Huang et al. 2012).These early settlers, in turn, act as powerful biological …

 — Microbial leaching methods are being increasingly applied for metal recovery from low-grade ores and concentrates that cannot be processed economically by conventional methods. As is the case with many biotechnological processes such methods may have been used since prehistoric times and probably the Greeks and Romans …

 — An example for heap bioleaching of polymetallic ore is the Talvivaara mine in Finland, where nickel, zinc, copper ... (1995) Microbial diversity in uranium mine waste heaps. Appl Environ Microbiol 61:2930–2935. CAS Google Scholar Schippers A, Jozsa P-G, Sand W (1996) Sulfur chemistry in bacterial leaching of pyrite. Appl Environ Microbiol …

 — In ancient period, mining is the barometer of changing economy through technological development. Especially, ancient Roman civilizations had a high demand for metals such as lead, zinc, copper, tin, mercury, etc. through mining for a high standard of living [1].These miners used the microbial community to leach metals without having …

 — Microbial ore leaching (bioleaching) is the process of extracting metals from ores with the use of microorganisms. This method is used to recover many different precious metals like copper, lead, zinc, …

To compare microbial communities from a chronosequence of mine land rehabilitation to pre-disturbance levels from references sites covered by native vegetation, non-rehabilitated, rehabilitating and reference study sites from the Urucum Massif, Southwestern Brazil are sampled. Microorganisms are useful environmental indicators, able to deliver essential …

Biomining is an increasingly applied biotechnological procedure for processing of ores in the mining industry (biohydrometallurgy). Nowadays the production of copper from low-grade ores is the most important industrial application and a significant part of world copper production already originates from heap or dump/stockpile bioleaching.

 — This review examines the acid and ferric sulfate bioleaching of uranium from low grade ores. The review traces back the progression of the technology from the time the role of microorganisms was recognized in the 1950's and 1960's. Some past and present uranium mining operations with active or potential microbial contribution are summarized.

 — Iron ore is the most widely used metal, which supplies the steel industry aimed at a variety of consumer products based on this ore. On the other hand, the companies that explore these areas should practice high control of these mining areas to avoid contamination in the soil, sediment, and water. ... Finally, the results reported here …

 — As a tech-hungry world gobbles up rare-earth elements, researchers are adapting bacteria that can isolate and purify the metals in the absence of harsh chemicals.

 — Microorganisms are useful environmental indicators, able to deliver essential insights to processes regarding mine land rehabilitation. To compare microbial communities from a chronosequence of mine land rehabilitation to pre-disturbance levels from references sites covered by native vegetation, we sampled non-rehabilitated, rehabilitating and …

 — Therefore, this review has been framed with the objective to introduce the role and efficiency of microbial communities in the mining of valuable metals from solid …

Application of microbial technology in the mining industry has shown a progressive ... has been reported that the Lo Aguirre mine in Chile pro-cessed about 16,000 t ore/day between 1980 and 1996 using