Results 11 to 20 of about 245 (206)

Multiple Sulfur Isotope Records of the 3.22 Ga Moodies Group, Barberton Greenstone Belt

open access: yesGeosciences, 2020
The Moodies Group, the uppermost unit in the Barberton Greenstone Belt (BGB) in South Africa, is a ~3.7-km-thick coarse clastic succession accumulated on terrestrial-to-shallow marine settings at around 3.22 Ga.
Masafumi Saitoh   +6 more
doaj   +1 more source

Research progress of non-cyanide gold leaching in gold mines

open access: yes工程科学学报, 2021
With the exhaustion of easy-to-treat gold ore resources, gold ores containing arsenic, carbon, high sulfur, and ultrafine particles have become the focus of gold mining.
Ke-bo PENG   +7 more
doaj   +1 more source

Mineralogical and Geochemical Studies of Oil Shale Deposits in the Cretaceous/Paleogene succession at Quseir Area, Egypt

open access: yesEgyptian Journal of Petroleum, 2019
Cretaceous/Paleogene succession in Quseir area represents one of the most important economic sedimentary rocks, which contain phosphate and oil shale beds.
M.A. Barakat   +4 more
doaj   +1 more source

Measurement of sulfur content in coal mining areas by using field-remote sensing data and an integrated deep learning model [PDF]

open access: yesPeerJ Computer Science
High-quality coal emits a smaller amount of harmful substances during the combustion process, which greatly reduces the environmental hazard. The sulfur content of coal is one of the important indicators that determine coal quality.
Jingyi Liu, Ba Tuan Le
doaj   +2 more sources

The Potential Role of Halothiobacillus spp. in Sulfur Oxidation and Acid Generation in Circum-Neutral Mine Tailings Reservoirs

open access: yesFrontiers in Microbiology, 2019
The biogeochemistry of acid mine drainage (AMD) derived from waste rock associated sulfide mineral oxidation is relatively well-characterized and linked to Acidithiobacillus spp..
Kelly Whaley-Martin   +6 more
doaj   +1 more source

Analysis of Carbon Contents and Heavy Metals in Coal Samples Using Calibration-free LIBS Technique

open access: yesJournal of Spectroscopy, 2022
We report a compositional analysis of four coal samples collected from different mines in Pakistan and one Chinese brand. The coal samples were pelletized in the form of a disc and irradiated with a focused laser beam of fundamental (1064 nm) and second (
Muhammad Aamir Israr   +3 more
doaj   +1 more source

The Power Generation from Coal in Pakistan: Assessment of Physicochemical Pollutant Indicators in Indigenous Reserves in Comparison to the Foreign Coal [PDF]

open access: yesPakistan Journal of Analytical & Environmental Chemistry, 2017
Electricity production through coal combustion is the only viable solution in minimum timing. As environmental chemists, our primary goal is to assess environmental hazards and suggest cost-effective technologies for reducing combustion pollutants.
Ghazia Anjum , M. Nasiruddin Khan
doaj   +1 more source

Analysis of Jet Structure and Physical Properties in the Coalfields of Northern China

open access: yesApplied Sciences, 2022
Archeological discoveries have identified China as one of the first countries in the world to use jet. However, many differences are evident between the jet currently found in existing mines and the archaeological discoveries of cultural relics in terms ...
Yuping Gao   +4 more
doaj   +1 more source

Reduction of Sulfur and Ash from Tabas Coal by Froth Flotation [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2007
Tabas mines in Iran have coal sources which are suitable for use in metallurgy industries as coking coal. But the high sulfur content of this coal imposes severe limitations on its utilization as the sulfur oxide gases evolved from the combustion of high
Mohammad Reza Ehsani, Farahnaz Eghbali
doaj  

STUDY OF BIO-COAL BRIQUETTE AS SOLID FUEL FOR ALUMINUM SMELTER

open access: yesSriwijaya Journal of Environment, 2017
Research on alternative energy today based on issues of global warming and greenhouse effects. The use of coal briquettes from low-calorie coal derived from mines in the province of South Sumatera originally destined for the food industry is less ...
Riman Sipahutar, Amir Arifin
doaj   +1 more source

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