Reactivity of Various Zero Valent Irons: Reduction of Trichloroethylene Saving the World! Lauren Vice, Jim Nurmi, John Schneider, Paul Tratnyek Department of Environmental and Biomolecular Systems OGI School of Science and Engineering Oregon Health & Science University ARS Technologies http://www.arstechnologies.com
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Reactivity of Various Zero Valent Irons: Reduction of Trichloroethylene Saving the World! Lauren Vice, Jim Nurmi, John Schneider, Paul Tratnyek Department.
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Reactivity of Various Zero Valent Irons: Reduction of Trichloroethylene
Saving the World!
Lauren Vice, Jim Nurmi, John Schneider, Paul TratnyekDepartment of Environmental and Biomolecular Systems
OGI School of Science and EngineeringOregon Health & Science University
ARS Technologieshttp://www.arstechnologies.com
Chlorinated Solvents and Possible Remediation
• Chlorinated Solvents are widely used and manufactured – 1980 = 121,000 metric tons of
TCE produced
• Suspected carcinogens & harmful to aquatic organisms
1.1Blowes, David (2007, May). In Situ. Retrieved August 15, 2008, from In Situ Treatment of Metals and other Inorganic Contaminants in Groundwater using Permeable Reactive Barriers: Treatability Testing Web site: http://www.science.uwaterloo.ca/research/ggr/EC_AerialView.jpg
Primary Objective
• Determine rate of TCE disappearance (kobs) with various ARS irons, and
• Measure presence and rate of appearance of daughter products.
Comparing Various Rate Constants for both CT and TCE
Carbon Tetrachloride
Trichloroethylene
Conclusion
• With out major research on daughter products of all five ARS iron types no clear conclusion can be made on which of the five irons is most efficient at degrading chlorinated solvents
• Further data must be collected
Suggestions for Future Research
• Further study of product peaks, such as those seen with High-Sulfur Atomized Iron
• Study of pH effects on degradation
• Look at longevity of various irons degradation abilities with chlorinated solvents