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Dry disposal of bauxite residues in abandoned mine open pits

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dc.contributor.author Xenidis, A en
dc.contributor.author Boufounos, D en
dc.date.accessioned 2014-03-01T02:51:35Z
dc.date.available 2014-03-01T02:51:35Z
dc.date.issued 2008 en
dc.identifier.issn 08950563 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/35582
dc.subject.other Al-concentration en
dc.subject.other Alkaline slurry en
dc.subject.other Annual precipitation en
dc.subject.other Bauxite residue en
dc.subject.other Drainage water en
dc.subject.other Environmentally safe en
dc.subject.other Field scale en
dc.subject.other Field test en
dc.subject.other High NA en
dc.subject.other Land disposal en
dc.subject.other Leachate en
dc.subject.other Open pit en
dc.subject.other Optimum moisture content en
dc.subject.other Process streams en
dc.subject.other Solids content en
dc.subject.other Vegetation cover en
dc.subject.other Waste rocks en
dc.subject.other Abandoned mines en
dc.subject.other Leaching en
dc.subject.other Mines en
dc.subject.other Mining en
dc.subject.other Open pit mining en
dc.subject.other Pollution en
dc.subject.other Sodium en
dc.subject.other Solid wastes en
dc.subject.other Wastewater disposal en
dc.subject.other Waste management en
dc.title Dry disposal of bauxite residues in abandoned mine open pits en
heal.type conferenceItem en
heal.identifier.primary 10.1061/40970(309)5 en
heal.identifier.secondary http://dx.doi.org/10.1061/40970(309)5 en
heal.publicationDate 2008 en
heal.abstract Bauxite residues exit the process stream as a highly alkaline slurry with low solids content rendering their land disposal a difficult issue. The objective of this study was to develop a methodology for environmentally safe dry disposal of bauxite residues in abandoned mine open pits. The methodology includes dewatering and controlled disposal of bauxite residues, capping with waste rock or treated bauxite residues and, finally, development of a vegetation cover. This methodology is mainly based on bauxite residue properties, which possess low hydraulic conductivity if compacted at optimum moisture content. Several parts of this scheme were investigated at laboratory and pilot field scale. Simulation of an abandoned mine that was planned to be rehabilitated was also performed. Based on the results obtained, the main risk due to bauxite residues disposal is associated with the alkalinity of the material and initially high Na and Al concentrations in the leachate that progressively decrease due to the depletion of these elements. Both the field tests and simulation indicate that the amount of drainage water will be minimal, i.e. approximately 3% of the annual precipitation. Copyright ASCE 2008. en
heal.journalName Geotechnical Special Publication en
dc.identifier.doi 10.1061/40970(309)5 en
dc.identifier.issue 177 en
dc.identifier.spage 40 en
dc.identifier.epage 47 en


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