Remediation of groundwater contaminated by brominated ethanes and ethenes

Elizabeth Cohen

    Research output: ThesisDoctoral Thesis

    17 Downloads (Pure)

    Abstract

    [Truncated] This study has been motivated by the discovery of an ex-laboratory site contaminated with 1,1,2,2-tetrabromoethane (TBE), and its daughter products: tribromoethane (TriBE), cis- and trans-1,2-dibromoethene (DBE) and vinyl bromide (VB) on the Swan Coastal Plain, in Perth, Western Australia. These compounds are not well understood or widely researched. The purpose of this study was to gain further knowledge of degradation rates and pathways of TBE and daughter compounds under different geochemical conditions, in order to asses the fate of these compounds in soil and groundwater environments.

    Investigation of sorption of TriBE, DBE and VB, showed that the transport of these compounds would not be significantly retarded in a contaminated plume. Natural attenuation of TriBE followed a combination of β-elimination, dominant in the initial stages, and hydrogenolyisis, dominating in the later stages of the reaction. Rates for TriBE, cis- and trans-DBE and VB natural attenuation were low, 96, 390, 230 and 240 days respectively. This reaction pathway, for a batch system, was successfully modelled using PHREEQC-2 (Parkhurst and Appello, 1999).
    Original languageEnglish
    QualificationDoctor of Philosophy
    Awarding Institution
    • The University of Western Australia
    DOIs
    Publication statusUnpublished - 2006

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