Dehalogenation of halogenated aliphatic organic compounds in the presence of the bimetallic system palladized iron

Persistent Link:
http://hdl.handle.net/10150/288956
Title:
Dehalogenation of halogenated aliphatic organic compounds in the presence of the bimetallic system palladized iron
Author:
Muftikian, Rosy
Issue Date:
1997
Publisher:
The University of Arizona.
Rights:
Copyright © 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.
Abstract:
Saturated 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.
Type:
text; Dissertation-Reproduction (electronic)
Keywords:
Chemistry, Analytical.; Environmental Sciences.
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Graduate College; Chemistry
Degree Grantor:
University of Arizona
Advisor:
Fernando, Quintus

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleDehalogenation of halogenated aliphatic organic compounds in the presence of the bimetallic system palladized ironen_US
dc.creatorMuftikian, Rosyen_US
dc.contributor.authorMuftikian, Rosyen_US
dc.date.issued1997en_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.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.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
dc.subjectChemistry, Analytical.en_US
dc.subjectEnvironmental Sciences.en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineChemistryen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorFernando, Quintusen_US
dc.identifier.proquest9729470en_US
dc.identifier.bibrecord.b34801959en_US
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