the role of microorganisms in asbestos mining

 · Developing Health and Safety in Mines. The phrase "Zero Harm" is a widely used strapline throughout the mining industry as we try to combat having reached, statistically at least, a …

The results of our survey of several mining operations have shown in every instance typical T. ferrooxidans bacteria to be present in the leaching solutions. The numbers of bacteria found are in general what, one would expect considering the chemical reactions occurring in these processes.

 · Biotechnology: using microbes as mining equipment. Marny Reakes explains how synthetic biology can change the way we mine. From the micro fracturing of rocks, to exploration and advanced bioleaching, we are just at the tip of the iceberg. by Carly Leonida. 4th November 2020.

 · Published: Sunday 31 July 1994. BACTERIA are a mixed blessing. On the one hand, they plague us with diseases such as tuberculosis and leprosy and on the other, they provide us with such delights as curd and wine. Now, we have bacteria that are miners. In the past few years, these diminutive diggers have become the darling of the mining industry.

 · The process of bioweathering involving natural microbes, natural plants and transgenic animals has proven to be a very efficient and effective tool for detoxifying xenobiotics. The present investigation uses the same tool as a device for detoxifying asbestos, a potent carcinogenic entity. The cellular mechanism of asbestos toxicity to a certain extent, as shown by research, is attributed to ...

The paper deals with the nature of mine drainage in the North Eastern Coalfield, Margarita, Assam (India). The drainages from the Margerita group of mines are found to be acidic with high sulphate ranging up to 1500 ppm and iron content rising up to 40 ppm. The total sulphur in coals is up to 7% out of which 50–80% is non-reactive organically found sulphur.

Science 19 Sep 1947: Vol. 106, Issue 2751, pp. 253-256 DOI: 10.1126/science.106.2751.253

The outflow of acidic liquids and other pollutants from mines is often catalysed by acid-loving microorganisms; these are the acidophiles in acid mine drainage.. Acidophiles are not just present in exotic environments such as Yellowstone National Park or deep-sea hydrothermal vents. Genera such as Acidithiobacillus and Leptospirillum bacteria, and Thermoplasmatales archaea, are present in ...

Microbes and their biosynthetic capabilities have been invaluable in finding solutions for several intractable problems mankind has encountered in maintaining the quality of the environment. They have, for example, been used to positive effect in human and animal health, genetic engineering, environmental protection, and municipal and ...

 · New role for asbestos mine Experts conduct simulated Mars mission. By: Peter Rakobowchuk ... you look at the gases that might be produced or used as a food source by bacteria on Mars," Cloutis said.

 · Microbial Mining – Carleton College: A Private Liberal Arts …. This biotechnology reference site describes the role of microbes in the mining industry. … the role of microorganisms in the sulfur cycle, natural oxidation … »More detailed

MICROBIAL MINING. The central role of bacteria in the leaching of copper from low-grade ore long went unrecognised. The minerals industry now stands to gain from the application of novel methods of microbiological technology . by Corale L. Brierley (Published in: Scientific American, 247, 42 - 50, 1982, here without accompanying figures)

Microorganisms also play a key role in phytostabilisation, either indirectly by promoting plant growth or directly through metals and metalloids mobilization or immobilization in soils. Thus, microorganisms are important actors of mining sites remediation.

Mining in North America. Before asbestos mining came to the United States, it was already commonplace in Canada. Quebec was a large mining area, though mines operated in cities throughout Canada. At one point, Canada had several dozen mines in operation and was the largest exporter of asbestos to the U.S. and many other countries.

Courtesy of the Department of Mines and Energy, St. John''s, NL. The asbestos mine at Baie Verte was reopened in 1982 by Transpacific Asbestos Limited, which ran the operation under the name of Baie Verte Mines Limited. By 1990, problems of markets and access, along with a wide range of health and legal problems, led once again to mine closure.

Asbestos, any of several minerals that readily separate into long, flexible fibres. Chrysotile, the fibrous form of the mineral serpentine, is the best-known type and accounts for about 95 percent of all asbestos in commercial use is a hydrous magnesium silicate with the chemical composition of Mg 3 Si 2 O 5 (OH) 4.The other types all belong to the amphibole group of minerals and include ...

 · Acid mine drainage (AMD) occurs when metal sulfides, most commonly pyrite, are exposed to and react with air and water. When water flows over or through sulfur-bearing mine tailings, a chemical reaction occurs between the water and rocks resulting in metal-rich water. AMD typically has a bright orange, yellow, or bownish-red color to it.

 · According to United Nations data, Russia, China, Brazil and Kazakhstan mined the bulk of the world''s asbestos supply in 2013. Rates of asbestos-related disease, including lung cancer and mesothelioma, are highest among in industries that handle asbestos directly. Most sources cite mining as the most dangerous of all asbestos-related occupations.

Vegetation restoration is an available way to ameliorate degraded lands. In order to study the response of soil microbes to vegetation restoration in coal mining subsidence areas, the composition and distribution of soil microbes were discussed through three plots: unsubsided area (CA), new subsided area (NSA), and old subsided area (OSA) with different vegetation restoration time in Huabei ...

 · While early studies did not report mutagenicity in bacteria exposed to asbestos fibers (Chamberlain & Tarmy 1977), more recent studies demonstrated an enhancement of revertants in the Ames test with crocidolite and chrysotile, or chrysotile only or with richterite (Cleveland 1984; Faux et al., 1994a; Howden & Faux, 1996a). Dose response was not ...

Microbialites were discovered in an open pit pond at an abandoned asbestos mine near Clinton Creek, Yukon, Canada. These microbialites are extremely young and presumably began forming soon after the mine closed in 1978. ... The presence of phototrophs at spherulite centers strongly suggests that these microbes play an important initial role in ...

Microbiological Mining The central role of bacteria in the leaching of copper from low-grade ore long went unrecognized. The minerals industry now stands to gain from the application of novel methods of microbiological technology The recovery of copper from the drainage water of mines was prob­ ably a widespread practice in the

The role of microorganisms in the oxidation of iron in acid mine drainage. That the presence of air is not the sole criterion of whether the water''s ferrous sulfate will change to ferric sulfate will be seen from the following simple experiments. If mercuric chloride, phenol, or formaldehyde -known disinfectants - are added to clear acid mine ...

 · Microorganisms in Mineral Recovery. Depletion of high grade metal ion deposits on going at a fast rate. • There is a need to seek for new sources of metals from low grade deposits • Mineral Recovery is possible using microorganisms Microbial mining? Biohydrometallurgy?

Miners and mining communities are among those at the greatest risk of contracting asbestos-related diseases. Asbestos is a naturally occurring fibrous mineral that was extensively mined during the early 20th century. Because asbestos is durable and flexible, as well as fire- and heat-resistant, it was used in manufacturing over 3,000 products.

The paper deals with the nature of mine drainage in the North Eastern Coalfield, Margarita, Assam (India). The drainages from the Margerita group of mines are found to be acidic with high sulphate ranging up to 1500 ppm and iron content rising up to 40 ppm. The total sulphur in coals is up to 7% out of which 50-80% is non-reactive organically found sulphur.

Review Role of Microorganisms in Mining: Generation of. 20151227&ensp·&ensp2. ROLE OF MICOORGANISMS IN MINING 2.1. Role of Microorganisms in ARD Production It has been reported that a number of acidofilic or acidtolerant bacteria namely Thiobacillus, Leptospirillum, Sulfolobus, Sulfobacillus and Metallogenium are associated with the mediation of acid generation from sulphide …

Vol. 24 No. 3 - July 2018. Role of microorganisms in reclamation of coal-mine spoils. By: R S Upadhyay 1 and Richa Raghuwanshi 2. Introduction. The fossil fuel coal is largely valued for its energy content. Since the 1880s it has been primarily and widely used for electric/power generation.

 · Asbestos exposure is linked to the development of numerous respiratory diseases, including mesothelioma, lung cancer, asbestosis and pleural disease. A federal report on asbestos in Ambler, Alaska, recommends that gravel in a local quarry not be used due to asbestos contamination and subsequent public health risks.

Growing evidence suggests a role of asbestos-induced redox-dependent signal pathways in malignant mesotheliomas and lung cancer. A better understanding of the dysregulation of these signaling pathways may benefit the prevention and therapy of asbestos-related mesothelioma (Heintz et al., 2010).

This study is aimed at defining a role for the mining industry in the country and evaluating its possible impacts on economic development in the future. Mineral resources development is an essential condition for successful economic development of Kyrgyz Republic. In fact, it is the only possible way to raise social welfare in remote high ...

 · ETx-E T~ s ELJEr VTER Earth-Science Reviews 41 (1996) 67-108 The environmental impact of mine wastes - Roles of microorganisms and their significance in treatment of mine wastes M. Ledin, K. Pedersen Geborg University, Gundberg Laboratory, Department of General and Marine Microbiology, Medicinaregatan 9C, S-413 90 Geborg, Sweden Accepted 27 February 1996 Abstract Mine …

that asbestos fibers induce chromosome aber-rations (CA), micronucleus (MN) formation, and aneuploidy, indicative of mutational events, earlier experimental data failed to detect any asbestos-induced genetic mutations in short-term assays. These include gene muta-tion assays in bacteria, and in vitro mammalian mutation assays at the ...

Role of microorganisms in rehabilitation of mining sites, focus on Sub Saharan African countries *O Bruneel 1, N Mghazli 2, L Sbabou 2, M Héry 1, C Casiot 1, A Filali-Maltouf 2 1 HydroSciences Montpellier, Univ Montpellier, CNRS, IRD, Montpellier, France 2 Equipe de Microbiologie et Biologie Moléculaire, Université Mohammed V, Rabat, Maroc *Corresponding author.

 · Mining Asbestos Exposure Limitations. The U.S. Department of the Interior created the Mining Enforcement and Safety Administration (now MSHA) to protect mine workers. One concern was asbestos exposure, causing the agency to set an initial exposure limit in 1974. The limit set was only five asbestos fibers per cubic centimeter of air.

Since the identification and characterization of iron and sulfur oxidizing bacteria in the 1940s, a rapid progress is being made in minerals engineering based on biological activities. Microorganisms can play a beneficial role in all facets of minerals processing, from mining to waste disposal and management. Some of the applications, such as biologically assisted leaching of copper sulfide ...

 · 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 ...

 · But microbes interact with each other and with the host. Each one can influence the other," said Lita Proctor, program director of the Human Microbiome Project. "So, it was important that we captured these time-sensitive interactions between the microbiome and the host." Preterm birth and missing bacteria in the vaginal microbiome

Asbestos, silicate minerals present in soil and used for building constructions for many years, are highly toxic due primarily to the presence of high concentrations of the transition metal iron. Microbial weathering of asbestos occurs through various alteration mechanisms. Siderophores, complex agents specialized in metal chelation, are common mechanisms described in mineral alteration.

The Role of Microorganisms in Acid Mine Drainage. By Arthur R. Colmer, M. E. Hinkle. Science 19 Sep 1947 : 253-256.

the role of microorganisms in coal mining. The soil debris is heaped in the form of dumps known as mine spoil The surface coal mining completely eliminates or harms the existing flora destroys the horizons of a soil profile altering microbial communities displaces or destroys fauna and their habitat reducing biodiversity degrades air quality deteriorates current land use patterns and to a ...