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Weathered Diesel oil as a sorptive phase for hydrophobic organic compounds in aquifer materials
| dc.creator | Hudson, Rondall James | |
| dc.date.accessioned | 2012-06-07T22:36:45Z | |
| dc.date.available | 2012-06-07T22:36:45Z | |
| dc.date.created | 1994 | |
| dc.date.issued | 1994 | |
| dc.identifier.uri | https://hdl.handle.net/1969.1/ETD-TAMU-1994-THESIS-H886 | |
| dc.description | Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to digital@library.tamu.edu, referencing the URI of the item. | en |
| dc.description | Includes bibliographical references. | en |
| dc.description.abstract | The sorptive properties of weathered diesel oil were investigated by conducting miscible displacement experiments with three hydrophobic organic compounds (HOCs), acenapthene, fluorene, and dibenzothiophene, as tracers in columns containing aquifer materials low in natural organic carbon (foc=0.0002) and contaminated with 0 to 200 [tg/g of a moderately weathered diesel oil. Even a minute amount (50 [tg/g) of diesel oil behaved as a highly effective sorptive phase, retarding the transport of HOCs through aquifer materials. Sorption increased linearly with weathered diesel oil content, indicating that the sorptive effects were additive. A comparison between sorption coefficients (K) for uncontaminated and contaminated aquifer material showed that diesel oil increased HOC sorption from 2 to 10 times aquifer material alone. By comparing the oil-water sorption coefficient (Koil) to published carbon-normalized sorption coefficients (Koc), weathered diesel oil was about 3 times more effective as a sorptive phase for the three solutes than natural organic carbon per unit mass. In addition, octanol-water partition coefficients (Kow) for the three solutes were found to be reasonable estimates for Koil values.Differences in K values from multiple and single tracer inputs suggested competition was occurring between HOCs for sorption sites in uncontaminated aquifer material. These differences and the disagreement between measured and published Koc values indicated that natural organic carbon was not dominating HOC sorption, and significant adsorption to the mineral surfaces was occurring. Therefore, the oil-treated columns were described as three component systems with adsorption to the mineral phase, and partitioning to the diesel oil and natural organic carbon phases. Decreased HOC mobility from sorption to weathered diesel oil will affect remediation strategies, such as pump and treat systems, vacuum extraction systems, and mathematical transport models based on f oc and published Koc values. | en |
| dc.format.medium | electronic | en |
| dc.format.mimetype | application/pdf | |
| dc.language.iso | en_US | |
| dc.publisher | Texas A&M University | |
| dc.rights | This thesis was part of a retrospective digitization project authorized by the Texas A&M University Libraries in 2008. Copyright remains vested with the author(s). It is the user's responsibility to secure permission from the copyright holder(s) for re-use of the work beyond the provision of Fair Use. | en |
| dc.subject | geology. | en |
| dc.subject | Major geology. | en |
| dc.title | Weathered Diesel oil as a sorptive phase for hydrophobic organic compounds in aquifer materials | en |
| dc.type | Thesis | en |
| thesis.degree.discipline | geology | en |
| thesis.degree.name | M.S. | en |
| thesis.degree.level | Masters | en |
| dc.type.genre | thesis | en |
| dc.type.material | text | en |
| dc.format.digitalOrigin | reformatted digital | en |
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