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

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

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

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

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

6. METHODS AND MATERIALS Shimazu Gas Chromatograph

7. GAS CHROMATOGRAPH

8. METHODS AND MATERIALS Shimazu Gas Chromatograph Three Irons

9. METHODS AND MATERIALS Shimazu Gas Chromatograph Three Irons Chlorinated Compounds

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

11. PLATFORM SHAKER

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

13. PLATFORM MIXING

14. MIXING EXPERIMENT

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

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

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

22. QUESTIONS?