DECHLORONATION OF TRICHLOROETHYLENE USING ZEROVALENT IRON July 27, 2000 The University of Oklahoma Research Experience for Undergraduates (REU) by: Matthew Jefferson

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

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

BACKGROUND Remediation –Passive Treatment –Replacement Reaction Why Do We Care?

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

METHODS AND MATERIALS Shimazu Gas Chromatograph

GAS CHROMATOGRAPH

METHODS AND MATERIALS Shimazu Gas Chromatograph Three Irons

METHODS AND MATERIALS Shimazu Gas Chromatograph Three Irons Chlorinated Compounds

TESTING PROCEDURE Dechloronation Experiment –Sample Preparation Irons Tris Buffer TCE Spike Solution Anaerobic Conditions –Platform Shaker Vial Cap Tris- buffer Iron 6 mL Vial

PLATFORM SHAKER

TESTING PROCEDURE Dechlorination Experiment –Sampling Procedure Liquid Gas QA/QC –GC Accuracy –Mixing vs. Time

PLATFORM MIXING

MIXING EXPERIMENT

EXPERIMENTAL RESULTS Duration General Trends/Observations –Dechlorination –First Order Rate Law

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

IN SUMMARY... Inconclusive More Research –Reproducibility –Fix problems –Reaction by-products –Controlling the reaction

QUESTIONS?