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dc.contributor.advisorFernando, Quintusen_US
dc.contributor.authorMuftikian, Rosy
dc.creatorMuftikian, Rosyen_US
dc.date.accessioned2013-05-09T09:20:25Z
dc.date.available2013-05-09T09:20:25Z
dc.date.issued1997en_US
dc.identifier.urihttp://hdl.handle.net/10150/288956
dc.description.abstractSaturated and unsaturated chlorinated aliphatic hydrocarbons containing one to three carbons are commonly used as industrial solvents. These solvents are often found as contaminants in groundwater through improper disposal and many of them are carcinogenic. Remediation of groundwater containing these chlorinated compounds is of obvious importance. Methods such as air stripping and carbon adsorption involve the physical transfer of these contaminants onto activated carbon, and that does not diminish their toxicity. Other methods such as U.V. irradiation in the presence of ozone, hydrogen peroxide, or TiO₂, are not cost effective for large volume contamination problems such as polluted lakes, rivers and streams. Elemental iron has been shown to dechlorinate low molecular weight chlorinated aliphatic compounds but the observed end products were still partially chlorinated. We have established that the bimetallic system palladized iron (0.05% Pd) is preferable to elemental iron for the rapid and complete hydrodechlorination of 1- and 2-carbon chlorinated compounds with minimal loss of palladium. The major product observed from the hydrodechlorination of the 2-carbon chlorinated compounds was ethane. Methane was the major product observed from the hydrodechlorination of the 1-carbon chlorinated compounds. The palladized iron bimetallic system is also capable of reducing CFC's, nitro-organic compounds and inorganic species such as nitrate ions.
dc.language.isoen_USen_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.subjectChemistry, Analytical.en_US
dc.subjectEnvironmental Sciences.en_US
dc.titleDehalogenation of halogenated aliphatic organic compounds in the presence of the bimetallic system palladized ironen_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
thesis.degree.grantorUniversity of Arizonaen_US
thesis.degree.leveldoctoralen_US
dc.identifier.proquest9729470en_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineChemistryen_US
thesis.degree.namePh.D.en_US
dc.description.noteThis item was digitized from a paper original and/or a microfilm copy. If you need higher-resolution images for any content in this item, please contact us at repository@u.library.arizona.edu.
dc.identifier.bibrecord.b34801959en_US
dc.description.admin-noteOriginal file replaced with corrected file October 2023.
refterms.dateFOA2018-09-06T06:32:08Z
html.description.abstractSaturated and unsaturated chlorinated aliphatic hydrocarbons containing one to three carbons are commonly used as industrial solvents. These solvents are often found as contaminants in groundwater through improper disposal and many of them are carcinogenic. Remediation of groundwater containing these chlorinated compounds is of obvious importance. Methods such as air stripping and carbon adsorption involve the physical transfer of these contaminants onto activated carbon, and that does not diminish their toxicity. Other methods such as U.V. irradiation in the presence of ozone, hydrogen peroxide, or TiO₂, are not cost effective for large volume contamination problems such as polluted lakes, rivers and streams. Elemental iron has been shown to dechlorinate low molecular weight chlorinated aliphatic compounds but the observed end products were still partially chlorinated. We have established that the bimetallic system palladized iron (0.05% Pd) is preferable to elemental iron for the rapid and complete hydrodechlorination of 1- and 2-carbon chlorinated compounds with minimal loss of palladium. The major product observed from the hydrodechlorination of the 2-carbon chlorinated compounds was ethane. Methane was the major product observed from the hydrodechlorination of the 1-carbon chlorinated compounds. The palladized iron bimetallic system is also capable of reducing CFC's, nitro-organic compounds and inorganic species such as nitrate ions.


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