Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"potential acidity"”.
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Determining a Total Dissolved Solids Release Index from Overburden in Appalachian Coal Fields
… to identify, handle, treat and isolate potentially acid-forming overburden materials at coal mines in the region. However, the techniques to predict acid mine drainage potential may not adequately predict the release of total dissolved solids (TDS). High concentrations of TDS have been …
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Evaluation of Sulfidic Materials in Virginia Highway Corridors
… on landscape relationships, and iii) to evaluate potential acidity testing procedures on diverse materials. Geologic formations associated with acid roadcuts were characterized by potential peroxide acidity (PPA) and S content, and grouped into four categories. Listed in order of increasing …
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The influence of fly ash additions on acid mine drainage production from coarse coal refuse
… quickly, producing peak leachate levels of acidity (pH 1.7), Fe (10,000 mg 1<sup>-1</sup>), SO<sub>4</sub><sup-2</sup>(30,000 mg 1<sup>-1</sup>), and Mn (300 mg 1<sup>-1</sup>). Both ash blended treatments provided alkaline leachate with low metal levels. A second column study used a refuse …
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Mitigation of water quality and ecosystem impacts of roadway construction through retrospective engineering analyses
… were also a source of dissolved metals, sulfate, acidity, and low pH. Roadway construction through West Virginia and other coal producing states in the Mid-Appalachian region should be handled in a manner more like that of mining operations, with development and employment of similar preventative …
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Physical and chemical properties of coarse coal refuse from Southwest Virginia
… coal refuse is difficult to reclaim due to high potential acidity and coarse fragment content, low water holding capacity, low fertility, and other problems. Little is known about coal refuse properties, particularly as they relate to revegetation potential. This study was undertaken to determine …
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Quantifying the effects of fertilizer type, source, and concentration on the post-production growth of containerized culinary herbs
… and irrigated with solutions varying in potential acidity (PA) or potential basicity (PB) and ratios of nitrogen to phosphorous (N:P) from commercially available water-soluble fertilizers . Plants were grown in 2 phases: 1) greenhouse production 2) simulated retail environment. …
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Influence of fly ash and other treatments on acid mine drainage from coal refuse
… and stabilized pyrite while neutralizing any acidity. The rock-P treatment appears to have bound free Fe and other elements released from pyrite oxidation but did not prevent acidification. Long term analysis may prove fly ash to be a viable alternative to conventional topsoiling/lime …