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dc.contributor.authorQuinones, Casilda.
dc.creatorQuinones, Casilda.en_US
dc.date.accessioned2011-11-28T14:09:08Z
dc.date.available2011-11-28T14:09:08Z
dc.date.issued1985en_US
dc.identifier.urihttp://hdl.handle.net/10150/191871
dc.description.abstractIn recent years there has been much concern over the migration of organic pollutants to groundwater. Many organic solvents undergo biodegradation in the soil, but little information is available on the amount of protection soil can provide to groundwater. In this study, the growth response of soil microorganisms was measured when exposed to various concentrations of methyl isobutyl ketone (MIBK), tetrahydrofuran (THF), and xylene. Three Arizona soils were used in the experiment: Canelo loam, Mohave sandy loam, and river sand. Microbial activity was measured using two methods, carbon dioxide evolution and dilution plate counts. The plate count method was found to have a high degree of experimental error. Because of this error, definite statements could not be made about the influence of the test solvents on microbial numbers using this technique. The CO₂ evolution experiments indicated that xylene and THF at concentrations of 0.1 and 0.5% were more readily biodegraded than MIBK at similar concentrations. At 1.0%, all three solvents were generally toxic. Overall, the organisms in the Mohave sandy loam were shown to best deal with the solvents followed by Canelo loam and then river sand. Higher soil surface area appeared to enhance the ability of the soil to biodegrade solvents.
dc.language.isoenen_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.subjectHydrology.
dc.subjectSoil microbiology -- Arizona.
dc.subjectPollution Environmental aspects -- Arizona.
dc.subjectSolvents -- Biodegradation.
dc.titleInfluence of three organic solvents on soil microbial activityen_US
dc.typeThesis-Reproduction (electronic)en_US
dc.typetexten_US
dc.contributor.chairFuller, W. H.en_US
dc.identifier.oclc213415496en_US
thesis.degree.grantorUniversity of Arizonaen_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineSoil and Water Scienceen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.nameM.S.en_US
dc.description.notehydrology collectionen_US
refterms.dateFOA2018-07-02T01:09:19Z
html.description.abstractIn recent years there has been much concern over the migration of organic pollutants to groundwater. Many organic solvents undergo biodegradation in the soil, but little information is available on the amount of protection soil can provide to groundwater. In this study, the growth response of soil microorganisms was measured when exposed to various concentrations of methyl isobutyl ketone (MIBK), tetrahydrofuran (THF), and xylene. Three Arizona soils were used in the experiment: Canelo loam, Mohave sandy loam, and river sand. Microbial activity was measured using two methods, carbon dioxide evolution and dilution plate counts. The plate count method was found to have a high degree of experimental error. Because of this error, definite statements could not be made about the influence of the test solvents on microbial numbers using this technique. The CO₂ evolution experiments indicated that xylene and THF at concentrations of 0.1 and 0.5% were more readily biodegraded than MIBK at similar concentrations. At 1.0%, all three solvents were generally toxic. Overall, the organisms in the Mohave sandy loam were shown to best deal with the solvents followed by Canelo loam and then river sand. Higher soil surface area appeared to enhance the ability of the soil to biodegrade solvents.


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