Title page for ETD etd-06102012-040552


Type of Document Master's Thesis
Author Moore, Jeffrey W.
URN etd-06102012-040552
Title Effects of surfactants on the biodegradation of toluene in soil
Degree Master of Science
Department Environmental Engineering
Advisory Committee
Advisor Name Title
Novak, John T. Committee Chair
Dietrich, Andrea M. Committee Member
Hoehn, Robert C. Committee Member
Keywords
  • Soils
Date of Defense 1989-09-05
Availability restricted
Abstract
The objective of this investigation was to observe and evaluate

the effects of surfactants on the biodegradation of toluene in the

subsurface. Soil microcosms containing gasoline were used to simulate

conditions of an aquifer contaminated with hydrocarbons. The

surfactants were the nonionics, Surfonic N-40 and N-95. Three volumes

of gasoline, 0.005, 0.05, and 0.1 mL, were injected into separate

microcosms in order to observe changes in toluene concentration in both

adsorbed component conditions and free-phase, interstitial gasoline

conditions. The data presented are the results from the microcosms

containing 0.005 mL gasoline. -Dissolved toluene was only partially

biodegraded in the microcosms containing free-phase hydrocarbons. The

lack of complete biodegradation was believed to be due to substrate

toxicity.

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