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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