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dc.contributor.authorMorris, Joshua Powellen_US
dc.date.accessioned2013-06-07T08:00:57Z
dc.date.available2013-06-07T08:00:57Z
dc.date.issued2013-06-06en_US
dc.identifier.othervt_gsexam:709en_US
dc.identifier.urihttp://hdl.handle.net/10919/23174
dc.description.abstract         The purpose of this thesis is to examine some of the potential fates of processing reagents in a coal preparation plant.  The focus is specifically on petro-diesel (termed "diesel" in this paper), which is used as a collector in the flotation of fine coal.  Diesel range organics (DRO) and polyaromatic hydrocarbons (PAHs) are measured in aqueous samples using gas chromatography equipped with either a flame ionization detector (GC-FID) or a mass spectrometer (GC-MS).  Samples are subjected to a variety of test conditions in order to understand the behavior of diesel compounds in coal processing streams.
         Results show that frother and collector reagents are not likely to partition completely to a single fraction of the process slurry.  Further test work has shown that sub-ppm levels of DRO dominated by the water soluble fraction of diesel are expected to be present in process waters; however, PAHs and insoluble DRO may be removed via volatilization and/or degradation.  DRO and PAHs are also expected to be desorbed from coal particles when contacted with fresh water.  Flotation tests have revealed that low levels of DRO are found in both the concentrate and tailings processing streams with slightly higher concentrations being found in the concentrate stream.  From the tests performed in this thesis, it appears as though there is no apparent environmental concern when coal preparation plants are operating under normal conditions.
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dc.format.mediumETDen_US
dc.publisherVirginia Techen_US
dc.rightsThis Item is protected by copyright and/or related rights. Some uses of this Item may be deemed fair and permitted by law even without permission from the rights holder(s), or the rights holder(s) may have licensed the work for use under certain conditions. For other uses you need to obtain permission from the rights holder(s).en_US
dc.subjectProcessing Reagentsen_US
dc.subjectCoal Preparationen_US
dc.subjectFlotationen_US
dc.subjectWater Managementen_US
dc.subjectDiesel Range Organicsen_US
dc.subjectDROen_US
dc.subjectPolyaromatic Hydrocarbonsen_US
dc.subjectPAHsen_US
dc.titleResidual Diesel Range Organics and Selected Frothers in Process Waters from Fine Coal Flotationen_US
dc.typeThesisen_US
dc.contributor.departmentMining and Minerals Engineeringen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineMining Engineeringen_US
dc.contributor.committeechairSarver, Emily Allynen_US
dc.contributor.committeememberLuttrell, Gerald H.en_US
dc.contributor.committeememberNovak, John T.en_US


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