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Coal, Gold, PBM,zinc,iron,lead
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∙ 12y ago
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What are two conditions which could occur to cause gangue to br reclassified as an ore?
In mining, gangue is the commercially worthless material that surrounds, or is closely mixed with, a wanted mineral in an ore deposit. The separation of gangue from minerals can be a major obstacle. The ore may also be crushed to a fine grain.
Why is it dangerous for rainwater to flow through piles of waste coal?
Abandoned Mine Lands (AML) are those lands, contaminated or scarred by PAST mining activity including: extraction, or processing of coal, ores and minerals. Sixty percent of these abandoned mines in the USA can be found in just three states: Kentucky, Pennsylvania, and, West Virginia.Coal refuse piles represent a significant subset of AML sites. These sites present both some unique problems and opportunities. The piles are typically barren and highly erosive.The bituminous piles in particular can leach highly concentrated substances with acidity values in the thousands of mg/L, and which can include, in addition to typical parameters, elevated levels of some trace metals such as arsenic, lead, copper, and chromium. The cost of reclaiming these piles using conventional techniques is high, and the extremely poor water quality is often beyond the reach of current passive treatment technology.Hundreds of millions of tons of coal mining refuse have long imposed an environmental burden on the land. Pennsylvania's Bureau of Abandoned Mine Reclamation estimates the cost to eliminate these abandoned mine problems and complete the cleanup of AML sites in Pennsylvania alone to be approximately $14.6 billion and take nearly 500 years.AMD (Abandoned Mine Drainage or Acid Mine Drainage) is water contaminated when pyrite (an iron sulfide found in coal refuse piles) is exposed and reacts with air and water to form sulfuric acid and dissolved iron. Some or all of this iron can precipitate to form the red, orange, or yellow sediments in the bottom of streams containing mine drainage. The acid runoff further dissolves heavy metals such as copper, lead, and mercury into ground or surface water. About half of the coal-mine discharges in Pennsylvania are acidic, with a pH greater than 5. There are a number of major environmental problems caused by AMD. It disrupts growth and reproduction of aquatic plants and animals, diminishes valued recreational fish species, degrades outdoor recreation and tourism, contaminates surface and groundwater drinking supplies, and causes acid corrosion of infrastructure like waste-water pipes.It is estimated that the acid leached from abandoned coal mines and coal refuse piles contributed to the degradation of more than 3,000 miles of streams and associated ground waters. In Pennsylvania it is the most extensive water pollution problem affecting four of its major river basins. Because coal mine drainage can contain toxic concentrations of acid, metals, and sediment, many of the mining impacted streams are lacking aquatic life. Consequently, states lose millions of dollars annually that could be generated if sport fishing were restored in the affected streams. The estimated taxpayer cost for restoring the damaged watersheds is many billions of dollars. Pennsylvania taxpayers have to date, invested millions of dollars to construct acid mine drainage treatment plants to treat AMD discharges.
Steps to mining smelting and refining that are used to extract minerals or elements from ore?
try your best. you test the amount of rock, check the profitability, mine the ore, do the process of smelting. f
What substances functions to control the release of hydrochloric acid to prevent excessive acidity?
I was looking for the answer to this too, and found that Gastrin (a hormone of the stomach) stimulates hydrochloric acid to be released to maintain the appropriate pH level. Are you in the same nutriton class as me? haha cause this is a quiz question for mine.
What are safe hydrogen sulfide levels in chlorine swimming pools?
That's "Sulfuric Acid" to the rest of us . Depending on the concentration you use(Mine is 38%). Never more then 12ozs per 20,000 gallons.
What has the author Barnaby Watten written?
Barnaby Watten has written: 'New technique treats acid mine drainage' -- subject(s): Acid mine drainage, Environmental aspects, Environmental aspects of Acid mine drainage, Technology transfer
What has the author A Perry written?
A Perry has written: 'Acid mine drainage - coal'
What has the author Eugene E Farmer written?
Eugene E Farmer has written: 'Acid mine waste revegetation' -- subject(s): Acid mine drainage, Acid soils
What has the author Robert L P Kleinmann written?
Robert L. P. Kleinmann has written: 'Prevention of acid mine drainage' 'Treatment of mine water to remove manganese' 'Bactericidal control of acid problems in surface mines and coal refuse. IN Graves, D. H., editor, Proceedings--1980 symposium on surface mining hydrology, sedimentology, and reclamation' 'Control of acid drainage from coal refuse using anionic surfactants' -- subject(s): Acid mine drainage, Coal mine waste, Industrial microbiology, Surface active agents 'Bacterial oxidation of acid-forming materials'
What has the author A H Morth written?
A. H Morth has written: 'Acid mine drainage' 'Pyritic systems'
What has the author Qingyun Sun written?
Qingyun Sun has written: 'Iron and acid removal from acid mine drainage in open limestone systems'
What is mining water?
Acid mine drainage is the low pH created by microorganisms convering sulfides and sulfates in tailing from the ore processing into sulfuric acid.
What has the author B E Broster written?
B. E Broster has written: 'The application of Quaternary studies to mine development and control of acid mine drainage'
What has the author Luther W Hyde written?
Luther W. Hyde has written: 'Acid mine drainage in Cane Creek Basin' -- subject(s): Acid mine drainage, Pollution, Water 'Alabama public meeting series on coastal zone boundaries' -- subject(s): Coastal zone management
What has the author Kafui Nyavor written?
Kafui Nyavor has written: 'A study of acid mine drainage formation and prevention methods'
Is decomposition of pyrite an important factor in generating acidic mine drainage?
Yes the sulphur in the pyrite makes sulphuric acid.
What has the author Kevin A Morin written?
Kevin A. Morin has written: 'Control of acidic drainage in layered waste rock at the Samatosum minesite' -- subject(s): Control, Acid mine drainage
