DECHLORONATION OF TRICHLOROETHYLENE USING ZEROVALENT IRON

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DECHLORONATION OF TRICHLOROETHYLENE USING
ZEROVALENT IRON

• July 27, 2000
• The University of Oklahoma
• Research Experience for Undergraduates (REU)
• by Matthew Jefferson

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ACKNOWLEDGMENTS

• National Science Foundation
• OU CEES
• REU Professor
• Dr. Elizabeth Butler
• Graduate Students
• Meera Subramanim
• Maria Leonor Támara

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OVERVIEW

• Background
• Research Question
• Materials and Methods
• Procedure
• Results
• Conclusion/ Recommendations

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BACKGROUND

• Remediation
• Passive Treatment
• Replacement Reaction
• Why Do We Care?

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RESEARCH QESTION

• How do different types of iron affect the
  dechlorination by-products of trichloroethylene
  (TCE)?

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METHODS AND MATERIALS

• Shimazu Gas Chromatograph

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GAS CHROMATOGRAPH
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METHODS AND MATERIALS

• Shimazu Gas Chromatograph
• Three Irons

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METHODS AND MATERIALS

• Shimazu Gas Chromatograph
• Three Irons
• Chlorinated Compounds

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TESTING PROCEDURE

• Dechloronation Experiment
• Sample Preparation
• Irons
• Tris Buffer
• TCE Spike Solution
• Anaerobic Conditions
• Platform Shaker

Vial Cap
Tris-buffer
Iron
6 mL Vial
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PLATFORM SHAKER
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TESTING PROCEDURE

• Dechlorination Experiment
• Sampling Procedure
• Liquid
• Gas

• QA/QC
• GC Accuracy
• Mixing vs. Time

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PLATFORM MIXING
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MIXING EXPERIMENT
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EXPERIMENTAL RESULTS

• Duration
• General Trends/Observations
• Dechlorination
• First Order Rate Law

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EXPERIMENTAL RESULTS

• Duration
• General Trends/Observations
• Dechlorination
• First Order Rate Law
• Problems
• Preliminary Data
• GC Calibration
• Reaction by-products
• Experimental Data

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IN SUMMARY...

• Inconclusive
• More Research
• Reproducibility
• Fix problems
• Reaction by-products
• Controlling the reaction

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QUESTIONS?