Title page for ETD etd-1114102-154731


Type of Document Master's Thesis
Author House, Jason S.
Author's Email Address jhouse1@lsu.edu
URN etd-1114102-154731
Title Enhanced Bioremediation of 1,1,2,2-Tetrachloroethane in Wetland Soils
Degree Master of Science in Civil Engineering (M.S.C.E.)
Department Civil and Environmental Engineering
Advisory Committee
Advisor Name Title
John H. Pardue Committee Chair
Clinton S. Willson Committee Member
William M. Moe Committee Member
Keywords
  • tetrachloroethane
  • biodegradation
  • bioremediation
  • wetland soils
Date of Defense 2002-10-23
Availability unrestricted
Abstract
This research investigated the capability of wetland soils to function as a medium for the degradation of 1,1,2,2-TeCA and its daughter products, and the influence of different hydrogen donors and nutrients on this process. The rate constants calculated for this study, show that removal of 1,1,2,2-TeCA is occurring in the microcosms receiving hydrogen donors as well as the biotic controls. The parent compound was undergoing complete degradation to ethene, which was confirmed by ethene analysis, as well as monitoring the intermediate compounds. The analysis for the degradation products of 1,1,2,2-tetrachloroethene is important in determining the overall potential for successful degradation of the parent compound. The major biotic daughter products of TeCA are the 1,2-dichloroethene isomers, vinyl chloride and ethene. The mass balance of the study had recoveries within 40% of the initial injection.

From the data collected in this study, it can be shown that enhanced bioremediation can be a viable strategy for the improvement of the soil degradation phase of wetland remediation processes. The addition of hydrogen donors to the wetland soils showed the ability to support a complete degradation process in the deepsoil. By amending the system with a slow release hydrogen donor such as butyrate and introducing a known dechlorinating culture, early success could be achieved until over time a well established dechlorinator population is produced.

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