A Novel Treatment for Acid Mine Drainage Utilizing Reclaimed Limestone Residual

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The viability of utilizing Reclaimed Limestone Residual (RLR) to remediate Acid Mine Drainage (AMD) was investigated. Physical and chemical characterization of RLR showed that it is composed of various minerals that contain significant quantities of limestone or calcium bearing compounds that can be exploited for acid neutralization. Acid Neutralization Potential (ANP) test results showed that RLR has a neutralization potential of approximately 83% as calcium carbonate (CaCO{sub 3}). Neutralization tests with most of the heavy metals associated with AMD showed removal efficiencies of over 99%. An unexpected benefit of utilizing RLR was the removal of hexavalent chromium Cr (VI) from ... continued below

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Moo-Young, Horace K. & Ochola, Charles E. August 31, 2004.

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Description

The viability of utilizing Reclaimed Limestone Residual (RLR) to remediate Acid Mine Drainage (AMD) was investigated. Physical and chemical characterization of RLR showed that it is composed of various minerals that contain significant quantities of limestone or calcium bearing compounds that can be exploited for acid neutralization. Acid Neutralization Potential (ANP) test results showed that RLR has a neutralization potential of approximately 83% as calcium carbonate (CaCO{sub 3}). Neutralization tests with most of the heavy metals associated with AMD showed removal efficiencies of over 99%. An unexpected benefit of utilizing RLR was the removal of hexavalent chromium Cr (VI) from the aqueous phase. Due to an elevation in pH by RLR most AMD heavy metals are removed from solution by precipitation as their metal hydroxides. Cr (VI) however is not removed by pH elevation and therefore subsequent ongoing tests to elucidate the mechanism responsible for this reaction were conducted.

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  • Report No.: None
  • Grant Number: FG26-03NT41805
  • DOI: 10.2172/924117 | External Link
  • Office of Scientific & Technical Information Report Number: 924117
  • Archival Resource Key: ark:/67531/metadc900012

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Office of Scientific & Technical Information Technical Reports

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  • August 31, 2004

Added to The UNT Digital Library

  • Sept. 27, 2016, 1:39 a.m.

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  • Nov. 30, 2016, 1:22 p.m.

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Moo-Young, Horace K. & Ochola, Charles E. A Novel Treatment for Acid Mine Drainage Utilizing Reclaimed Limestone Residual, report, August 31, 2004; United States. (digital.library.unt.edu/ark:/67531/metadc900012/: accessed July 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.