pyrite effects of coal mining

pyrite effects of coal mining

Beneficiation of pyrite from coal mining - ScienceDirect

2016-12-15 · 1. Introduction. Pyrite, a mineral with a chemical formula of FeS 2, is an iron disulfide, which is usually associated with other sulfides and oxides.It is abundant in the earth's surface, being found in the composition of sedimentary and metamorphic rocks, in coal beds and as a replacement mineral in fossils (Klein and Hurlbut, 1993).There are occurrences of high

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Effects of pyrite on the spontaneous combustion of coal ...

2015-9-28 · Pyrite has a significant effect on the spontaneous combustion of coal. The presence of pyrite can change the propensity of coal towards spontaneous combustion. The influences of various pyrite contents on the parameters of spontaneous combustion, such as index gases, temperature and released heat etc., were investigated in this study. Coal samples with

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Role of pyrite in formation of hydroxyl radicals in coal ...

2006-12-19 · The harmful effects from inhalation of coal dust are well-documented. The prevalence of lung disease varies by mining region and may, in part, be related to regional differences in the bioavailable iron content of the coal. Pyrite (FeS2), a common inorganic component in coal, has been shown to spontaneously form reactive oxygen species (ROS)

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Beneficiation of pyrite from coal mining | Request PDF

Abstract. An abundant mineral in nature and despite its potential as raw material for different segments of industry, when it comes from coal mining, pyrite (FeS2) is treated as waste, and its ...

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Effect of Pyrite Ore in Direct Coal Liquefaction Process ...

2020-8-4 · The catalytic activity of pyrite ore from coal mining was studied in the direct liquefaction process of high volatile bituminous coal from the south of Brazil. The process consisted of mixing pulverized coal with tetralin in the presence of catalyst. It was possible to obtain fractions of preasphaltenes, asphaltenes, and oils.

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Pyrite, Coal, Kentucky Geological Survey, University of ...

2019-9-17 · Pyrite (FeS 2) is the most common sulfide mineral in coal and a major source of the sulfur in coal.Pyrite can form in peat while the peat is accumulating, or can form in peats from the introduction of sulfate (SO 4) into the peat if the peat was buried by marine waters (such pyrite is called syngenetic or authigenic pyrite).Within the buried peat, the sulfate is reduced to sulfide

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Compound effects of water immersion and pyritic sulfur

2022-1-15 · To explore the mutual effect of water immersion and pyrite on the non-caking coal, this article selected the coal samples from Hujert Mining District (Inner Mongolia, China) as representative. According to national standards, fresh bulk coal from Hulusu 21,104 working face (H4 sample) and Menkeqing 3102 (M2 sample, higher pyrite content), 3104 ...

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The Effect of Carbon Defects in the Coal–Pyrite Vacancy on ...

2020-9-15 · Pyrite is a mineral often associated with coal in coal seams and is a major source of sulfur in coal. Coal–pyrite is widely distributed, easily available, low-cost, and non-toxic, and has high light absorption coefficient. So, it shows potential for various applications. In this paper, the density-functional theory (DFT + U) is used to construct coal–pyrite with carbon doped

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Effect of coal mine waters of variable pH on springwater ...

Disruption of coal strata during mining accelerates pyrite oxidation by exposing greater surface areas of the reactive mineral to weathering. Acidic water in a coal mine in the Niangziguan spring watershed is related to this process and is characterized by low pH (min. 2.52) and high sulfate (max. 4100 mg/I), iron (max. 257 mg/I), and hardness (max. 2274.45 mg/I). However, it is

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Negative Effects of Coal Mining - The World Counts

The negative effects of coal mining cannot be disputed: Destruction of Landscapes and Habitats: Strip mining also known as surface mining, involves the stripping away of earth and rocks to reach the coal underneath. If a mountain happens to be standing in the way of a coal seam within, it will be blasted or levelled - effectively leaving a ...

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Effects of pyrite on the spontaneous combustion of coal

2017-8-28 · Apparently, pyrite has a positive effect on coal oxidation. Nevertheless, the relationship is a little complicated. With the addition of pyrite content in coals, the released CO during spontaneous combustion increases at the beginning and decreases after exceeding 5 %. That is to say, a maximum impact is reached when the pyrite content in coal ...

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Beneficiation of pyrite from coal mining | Request PDF

Abstract. An abundant mineral in nature and despite its potential as raw material for different segments of industry, when it comes from coal mining, pyrite (FeS2) is treated as waste, and its ...

Read More
Role of pyrite in formation of hydroxyl radicals in coal ...

2006-12-19 · Pyrite has recently been shown to spontaneously generate hydrogen peroxide (H 2 O 2) [32,33] and hydroxyl radicals (• OH) [23,24] when placed in water.The formation of these reactive oxygen species (ROS) also explains the recent observation that aqueous pyrite slurries degrade yeast RNA, ribosomal RNA, and DNA [].Pyrite is thought to form H 2 O 2 through the

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Pyrite, Coal, Kentucky Geological Survey, University of ...

2019-9-17 · Pyrite (FeS 2) is the most common sulfide mineral in coal and a major source of the sulfur in coal.Pyrite can form in peat while the peat is accumulating, or can form in peats from the introduction of sulfate (SO 4) into the peat if the peat was buried by marine waters (such pyrite is called syngenetic or authigenic pyrite).Within the buried peat, the sulfate is reduced to sulfide

Read More
The Effect of Carbon Defects in the Coal–Pyrite Vacancy on ...

2020-9-15 · Pyrite is a mineral often associated with coal in coal seams and is a major source of sulfur in coal. Coal–pyrite is widely distributed, easily available, low-cost, and non-toxic, and has high light absorption coefficient. So, it shows potential for various applications. In this paper, the density-functional theory (DFT + U) is used to construct coal–pyrite with carbon doped

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Effects of Moisture and Associated Pyrite on the ...

2021-1-23 · Sulfur exists in coal in the form of pyrite, sulfate, and organic sulfur, among which pyrite has the greatest impact on coal spontaneous combustion.25 Deng et al.26 found that under the separate action of different microstructure contents and pyrite, low-temperature oxidation can enhance the apparent activation energy of coal.

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Thermal phase transition of pyrite from coal | SpringerLink

2018-8-16 · The thermal phase transition of pyrite from coal was studied using thermogravimetry and derivative thermogravimetric, infrared spectroscopy and X-ray diffraction (XRD). According to the XRD results, the phase transition of the pyrite starts at 350 °C, pyrrhotite and magnetite are intermediate products of the oxidation from pyrite to hematite. It was proposed that the main

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Pyrite depression by phosphates in coal flotation - Mining ...

1998-2-1 · The selective depression of pyrite from the Kentucky No. 9 coal seam was systematically examined using various kinds of inorganic and organic chemicals. Most of the organic chemicals tested showed little selectivity in pyrite depression. It was found that both orthophosphate and pyrophosphate were effective for the selective depression of coal pyrite in

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Particle and Fibre Toxicology BioMed Central

2017-8-26 · Background: The harmful effects from inhalation of coal dust are well-documented. The prevalence of lung disease varies by mining region and may, in part, be related to regional differences in the bioavailable iron content of the coal. Pyrite (FeS 2), a common inorganic

Read More
Negative Effects of Coal Mining - The World Counts

The negative effects of coal mining cannot be disputed: Destruction of Landscapes and Habitats: Strip mining also known as surface mining, involves the stripping away of earth and rocks to reach the coal underneath. If a mountain happens to be standing in the way of a coal seam within, it will be blasted or levelled - effectively leaving a ...

Read More
Role of pyrite in formation of hydroxyl radicals in coal ...

2006-12-19 · Pyrite has recently been shown to spontaneously generate hydrogen peroxide (H 2 O 2) [32,33] and hydroxyl radicals (• OH) [23,24] when placed in water.The formation of these reactive oxygen species (ROS) also explains the recent observation that aqueous pyrite slurries degrade yeast RNA, ribosomal RNA, and DNA [].Pyrite is thought to form H 2 O 2 through the

Read More
Effect of Pyrite Ore in Direct Coal Liquefaction Process ...

2020-8-4 · The catalytic activity of pyrite ore from coal mining was studied in the direct liquefaction process of high volatile bituminous coal from the south of Brazil. The process consisted of mixing pulverized coal with tetralin in the presence of catalyst. It was possible to obtain fractions of preasphaltenes, asphaltenes, and oils.

Read More
The Effect of Carbon Defects in the Coal–Pyrite Vacancy on ...

2020-9-15 · Pyrite is a mineral often associated with coal in coal seams and is a major source of sulfur in coal. Coal–pyrite is widely distributed, easily available, low-cost, and non-toxic, and has high light absorption coefficient. So, it shows potential for various applications. In this paper, the density-functional theory (DFT + U) is used to construct coal–pyrite with carbon doped

Read More
The Effects of Coal Mining | Custom PHD Thesis

2015-7-4 · The Effects of Coal Mining 1. Develop hypotheses predicting the effect of pyrite and coal (activated carbon) on the acidity of water? a. Pyrite hypothesis = b. Coal (activated carbon) hypothesis = 2. Based on the results of your experiment, would you reject or accept each hypothesis that you produced in question 1? Explain how []

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Assessing the reactivity of pyrite

2020-10-13 · Coal Operators Conference The University of Wollongong 8-10 February 2017 391 ASSESSING THE REACTIVITY OF PYRITE Basil Beamish1 and Jan Theiler2 ABSTRACT: The presence of pyrite in coal has often been attributed to being a factor in spontaneous combustion, but quantifying the effect has been problematical from a hazard assessment viewpoint.

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Particle and Fibre Toxicology BioMed Central

2017-8-26 · Background: The harmful effects from inhalation of coal dust are well-documented. The prevalence of lung disease varies by mining region and may, in part, be related to regional differences in the bioavailable iron content of the coal. Pyrite (FeS 2), a common inorganic

Read More
The causes behind pyrite oxidation - and acid ... -

2020-11-1 · Pyrite oxidation, which can lead to acid mine drainage, is a concern for miners all across the globe. However, little is known about the processes that cause this phenomenon.

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Adenine oxidation by pyrite-generated hydroxyl radicals ...

2010-4-26 · Pyrite (FeS 2), the most common metal sulfide mineral associated with coal and metal mine waste, has been shown to generate hydrogen peroxide (H 2 O 2) [1, 2] and hydroxyl radicals (• OH) [3, 4] when placed in water.In the presence of dissolved molecular oxygen, ferrous iron associated with pyrite can form superoxide anion (O 2 •)-(eq. 1), which reacts with ferrous

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Cradle to Grave: The Environmental Impacts from Coal ...

2021-9-29 · Coal Mining Coal mining harms land, surface waters, groundwater and even our air.4 Impacts to the land from mining cause drastic changes in the local area. Damage to plants, animals and humans occurs from the destruction and removal of habitat and environ-mental contamination. Surface mining completely removes land from its normal uses.

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How does coal mining cause acid mine drainage? – Colors ...

Coal is the largest contributor to the human-made increase of carbon dioxide in Earth’s atmosphere. There are severe health effects caused by burning coal. According to a report by the World Health Organization in 2008, coal particulates pollution are estimated to shorten approximately 10,000 lives annually worldwide.

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