Show simple item record

dc.contributor.advisorHendry, M. Jimen_US
dc.creatorBirkham, Tyler Kurten_US
dc.date.accessioned2010-04-13T06:04:05Zen_US
dc.date.accessioned2013-01-04T04:29:05Z
dc.date.available2011-04-13T08:00:00Zen_US
dc.date.available2013-01-04T04:29:05Z
dc.date.created2009-12en_US
dc.date.issued2009-12en_US
dc.date.submittedDecember 2009en_US
dc.identifier.urihttp://hdl.handle.net/10388/etd-04132010-060405en_US
dc.description.abstractThe controls of water and O2 availability, microbial activity and temperature on acid (H2SO4) production rates in commercial-scale sulphur (S0) blocks were quantified and recommendations were made for minimizing H2SO4 production in S0 blocks. Acidic drainage from the S0 blocks (pH 0.4-1.0) was attributed to mixing of fresh infiltrating water and low-pH resident water (mean pH=-2.1) with resident water comprising ~4-8% of the drainage. Although clean S0 is strongly hydrophobic, preferential water infiltration occurred rapidly through fractured S0 blocks in which the bulk hydraulic conductivity was estimated to be similar to gravel or clean sand (Ks=1x10-1 to 1x10-3 m/s). Microbial colonization of fracture faces generated localized hydrophilic conditions that helped create preferential pathways for water infiltration. Liquid water contact (compared to water vapour) was essential for S0 oxidation (i.e., H2SO4 production), therefore H2SO4 production in the S0 blocks was limited to fractures and friable S0 through which water flowed. H2SO4 production was greatest in the upper 1 m of the S0 block (70 to >97% of annual H2SO4 production) and the result of autotrophic microbial S0 oxidation. S0 oxidation rates were very sensitive to temperature and increased by a factor of 4.3 for a temperature increase of 10°C (Q10). Therefore minimizing temperature (1 vol.%, the total mass production rate of H2SO4 is approximately proportional to the O2 concentration at the surface of the S0 block (assuming in situ O2 concentrations decrease toen_US
dc.language.isoen_USen_US
dc.subjecttransporten_US
dc.subjectreactionen_US
dc.subjectgeochemistryen_US
dc.subjectaciden_US
dc.subjectsulphuren_US
dc.subjectstorageen_US
dc.subjectgasen_US
dc.titleControls and rates of acid production in commercial-scale sulphur blocksen_US
thesis.degree.departmentCollege of Arts and Scienceen_US
thesis.degree.disciplineCollege of Arts and Scienceen_US
thesis.degree.grantorUniversity of Saskatchewanen_US
thesis.degree.levelDoctoralen_US
thesis.degree.nameDoctor of Philosophy (Ph.D.)en_US
dc.type.materialtexten_US
dc.type.genreThesisen_US
dc.contributor.committeeMemberAnsdell, Kevinen_US
dc.contributor.committeeMemberBarbour, S. Leeen_US
dc.contributor.committeeMemberRenaut, Robinen_US
dc.contributor.committeeMemberWassenaar, Lenen_US
dc.contributor.committeeMemberEglington, Bruceen_US
dc.contributor.committeeMemberMolson, Johnen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record