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Environmental Engineering Research 2002;7(2): 67-73. DOI: https://doi.org/10.4491/eer.2002.7.2.067
SOIL MICROCOSM STUDIES FOR AEROBIC COMETABOLISM OF 1,1,1 -TRICHLOROETHANE, 1,1 -DICHLORETHYLENE, TRICHLOROETHYLENE AND OTHER CHLORINATED ALIPHATIC HYDROCARBONS BY BUTANE-OR PROPANE-UTILIZING MICROORGANISMS
Young Kim, and Lewis Semprini
Department of Civil, Construction, and Environmental Engineering, Oregon State University, Corvallis, OR 97331, USA
Corresponding Author: Young Kim ,Tel: +1-541-737-8256, Fax: +1-541-737-3099 , Email: kimyo@engr.orst.edu
Received: July 18, 2001;  Accepted: April 18, 2002.
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ABSTRACT
Microcosm studies were performed to determine the potential of microorganisms grown on butane or propane to cometabolize chlorinated aliphatic hydrocarbon (CAH) mixtures and to evaluate nutrient addition effects on primary substrate degradation and CAHs transformation rates. Chloroform, chlorinated ethane mixtures [1,2-dichloroethane (1,2-DCA), 1,1-dichloroethane (1,1-DCA), 1,1,1-trichloroethane (1,1,1- TCA) and 1,1,2-trichloroethane (1,1,2-TCA)], chlorinated ethylene mixtures [vinyl chloride (VC), cis-1, 2-dichloroethylene (c-DCE)], and mixtures of 1,1,1-TCA and 1,1-dichloroethylene (1,1-DCE) were transformed by butane-utilizers. Propane utilizers showed ability to transform a broader range of CAHs than butane-utilizers, especially trichloroethylene (TCE) and trans-1,2-dichloroethylene (f-DCE). Nutrient addition (yeast extract) resulted in the increase of both butane and propane utilization and CAHs transformation rates. Nutrient addition increased microbial activity, resulting in the effective transformation of CAHs mixtures. These results indicate that butane- and propane-utilizers can transform problematic CAHs mixtures, including 1,1-DCE.
Keywords: aerobic cometabolism | butane-utilizing microorganisms | chlorinated aliphatic hydrocarbons | propane-utilizing microorganisms | soil microcosm
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