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Abstract:
Bioremediation of chlorinated solvent source zones faces two major challenges: sustained
release of electron donors at the appropriate (low) concentrations and delivery of
electron donors to the intended target microbes. To address these issues, three
candidate partitioning electron donors (PEDs), n-butyl acetate, 2-ethyl-1-hexanol, and
isopropyl-propionate, were investigated as a ... read morelong-term source of electron donor at the
contaminant-water interface. A series of batch reactors and column experiments were used
to determine the extent and rate of partitioning of the PEDs into the dense non-aqueous
phase liquid (DNAPL), the lifetime of the PEDs in the DNAPL source zone, and the ability
of the PEDs to be utilized by organohalide respiring bacteria to reduce
tetrachloroethene to ethene and promote bioenhanced dissolution. Results suggest that
PEDs have the potential to reduce the frequency of electron donor injections, while
stimulating organohalide respiring bacteria to produce ethene in a similar timeframe to
conventional electron donors.
Thesis (M.S.)--Tufts
University, 2016.
Submitted to the Dept. of Civil
Engineering.
Advisor: Natalie
Cápiro.
Committee: Natalie Cápiro, Kurt
Pennell, and Paul Dombrowki.
Keyword: Environmental
engineering.read less
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