3 edition of The influence of fly ash additions on acid mine drainage production from coarse coal refuse found in the catalog.
The influence of fly ash additions on acid mine drainage production from coarse coal refuse
Barry Robert Stewart
by Virginia Polytechnic Institute and State University in Blacksburg, VA
Written in English
|Statement||by Barry Robert Stewart|
|The Physical Object|
|Pagination||xi, 205 l.|
|Number of Pages||205|
the fly ash as the sole cementing material (Cross ). In addition to providing an indication of the mineralogy and reactivity of the fly ash, the calcium content is also useful in predicting how effective the fly ash will be in terms of reducing the heat of hydration (Thomas ), controlling expansion due to alkali-silica reaction (Shehata. Filling mining is an effective way to settle the dilemma of Three Down and One Above in coal mining. Fly ash and coal gangue can be used as filling materials with significant social, economic, and environmental benefits. Using coarse fly ash base as cementing material and coal gangue as aggregate, orthogonal experiment of filling paste was conducted in this study. The range.
Acid Mine Drainage: Chemistry Acid mine drainage impacts stream and river ecosystems through acidity, ferric ion (Fe 3+) precipitation, oxygen depletion, and release of heavy metals associated with coal and metal mining, such as aluminum (Al 3+), zinc (Zn 2+), and manganese (Mn 2+).. When mineral deposits that contain sulfides are mined, they have the potential to produce acid mine drainage. U.S. Geological Survey Fact Sheet Online Version Coal Combustion Products. By Rustu S. Kalyoncu and Donald W. Olson. Coal-burning powerplants, which supply more than half of U.S. electricity, also generate coal combustion products, which can be both a resource and a disposal problem. The U.S. Geological Survey collaborates with the American Coal Ash Association in .
Use fly ash and other CCPs as: An alkaline seal or fill material to contain acid forming materials and prevent the formation of acid mine drainage. An agricultural supplement to create artificial soil on abandoned mine lands where native soils are not available. The influence of fly ash additions on acid mine drainage production from coarse coal refuse. Ph.D. dissertation, Virginia Tech, Blacksburg, VA. Stewart, B.R., and W. L. Daniels. Leachate quality and plant growth from bulk blended fly ash/coal refuse mixtures: Field Study Results. p. –
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INFLUENCE OF FLY ASH, TOPSOIL, LIME, AND ROCK‐P ON ACID MINE DRAINAGE FROM COAL REFUSE1 by Meral L. Jackson Barry R. Stewart W. Lee Daniels2 Abstract. Most Appalachian coal refuse materials contain significant amounts of pyritic S and are likely to produce acid mine drainage (AMD).
A column technique was designed and. Coal Fly Ash Beneficiation - Treatment of Acid Mine Drainage with Coal Fly Ash 2 coal combustion (temperature, air/fuel ratio, coal pulv erization size, and rate of combus.
Coal mining and coal combustion in generation of electricity produces various types of wastes such as, acid mine drainage (AMD) and fly ash(FA)that require a form of management and remediation. This book explores the fundamental chemistry of active and passive treatment of AMD with coal FA and the detailed geochemistry involved in the.
In this study, fly ash obtained from a coal burning power plant was used to remove iron from coal mine drainage as well as raising the pH to acceptable limits for natural water using column chromatography. The results of this study indicate that fly ash has the ability to completely remove iron and reduce acidity of coal mine water drai- nage.
Coal Fly Ash Beneficiation - Treatment of Acid Mine Drainage with Coal Fly Ash 88 is a strong indication that AMD chemistry has a signi cant role to play in the nal product water chemistry. Different fly ash: acid mine drainage ratios (FA: AMD) were stirred in a beaker for a set time and the process water analyzed for major, trace elements and sulphate content.
The three factors that finally dictated the nature of the final solution in these neutralization reactions were the FA: AMD ratio, the contact time of the reaction and the.
Coarse rocky material lacks water holding capacity, while fine compact soil is deficient in pore spaces, limiting plant available moisture.
Fly ash, to some a useless by product of coal-fired power plants, is an effective and economical additive for improving the properties of strip mine spoil.
The fly ash controls the acid generation by the addition of alkalinity to the system and neutralization of the acidity produced. The fly ash also reduces the hydraulic conductivity of the mine spoils. Recent studies have shown that treatment of acid mine drainage (AMD) with fly ash is possible.
Utilization of South African Fly Ash to Treat Acid Coal Mine Drainage, and Production of High Quality Zeolites from the Residual Solids Leslie F.
Petrik1, Richard A. White1, Michael J. Klink1, Vernon S. Somerset1, Colleen L. Burgers2 and Martin V. Fey2 1 Department of Chemistry, University of the Western Cape, Private Bag X17, Bellville.
Coal Combustion Products Production & Use Statistics. An American Recycling Success Story: Beneficial Use Of Coal Combustion Products. Production and Use Survey Results News Release. European Coal Ash Association (ECOBA) ECOBA CCP Production.
Utilizing acid mine drainage sludge and coal fly ash for phosphate removal from dairy wastewater. Wang YR, Tsang DC, Olds WE, Weber PA. This study aims to investigate a new and sustainable approach for the reuse of industrial by-products from wastewater treatment. The development of a system for the utilization of fly ash produced at coal-fired power stations to treat acid mine drainage (AMD) resulting from coal mining activities was investigated.
It involved a neutralization process, in which the pH of the AMD solution was raised from 2–3 to neu-tral pH when reacted with an appropriate amount of fly ash. The coal fly ash (FA), mainly containing high unburnt carbon was modified by alkali hydrothermal treatment.
The modified fly ash (MFA) contains lower amounts of Si and Al and has a higher surface area and pH than the untreated fly ash (FA).
The objective of this study is to investigate the potential of MFA as a low cost adsorbent material for the removal of Al, Fe, Ni, Pb, Zn and Mn from acid.
Removal of heavy metals from acid mine drainage (AMD) using coal fly ash, natural clinker and synthetic zeolites The addition of NC and NCZ produced a steep decrease in Pb concentration within the first 5 min, followed by a very stable behaviour and a progressive decrease between 5 and 30 min using NC and NCZ, respectively; a sudden.
Several research studies have reported on the application of coal fly ash for the amendment of acidic coal mine spoils and of acidic soils.
These applications were motivated by the alkaline nature of the coal fly ash. 1. Introduction. Coal fly ash (CFA) is a solid residual by-product of coal combustion in thermal power plants. Unlike normal industrial by-products, CFA is a complex anthropogenic material that is difficult to handle because of its toxicity; the toxicity is due to its (CFA) intricate composition comprising organic and inorganic compounds at various scales derived from different grades of coal.
Key words: Coal, Mining waste, Acid mine drainage, Neutralization, Fly ash. Introduction Despite the latest developments for cleaner alternative fuels, coal still shares about 28% of the total world’s primary energy supply (IEA ).
It is a very large scale activity by which ca. billion. The hydraulic conductivity of the coal fly ash was measured to be in the order of 2 x m/s when it was permeated with deionized water, and this value decreased significantly when the permeant was switched to acid mine drainage (AMD).
Addition of bentonite to coal fly ash lowered the hydraulic conductivity during water permeation but no. Mine drainage generated during coal and mineral extraction remains an environmental challenge globally. In particular, acid mine drainage (AMD), if not handled properly, can cause serious negative impact on the environment.
Inprogresses were made in active AMD treatment (physicochemical and biological processes). fineness of the limestone used in the treatment of acid wastes and coal mine drainage. Wilmoth and Hill'' studied the treatment of high ferric iron (mean value total iron 93 mg/1, 80 percent in ferric state) mine water using lime, limestone "rock dust" and soda ash as neutralizing agents.
The present book deals with various, very significant topics of coal fly ash beneficiation, such as treatment of acid mine drainage with coal fly ash, toxic metal adsorption using coal fly ash, recovery of metals from coal fly ash and phytoreclamation of abandoned acid mine drainage site after treatment with coal fly ash, the status of research in coal fly ash utilization and applications and.INNOVATIVE ASH PLACEMENT PROJECTS.
70 Chapter 4. Coal Ash Beneficial Use (Conventional Ash Placement) on Anthracite Mine.Stewart, B.R. The Influence of Fly Ash Additions on Acid Mine Drainage Production from Coarse Coal Refuse. PhD Dissertation. Virginia Polytechnic Institute and State University.
Blacksburg, Virginia. Tennessee Valley Authority. Ash Release at TVA’s Kingston Fossil Plant. Last visited 12 June Tennessee Valley Authority.