Dehalogenimonas spp. can Reductively Dehalogenate High Concentrations of 1,2-Dichloroethane, 1,2-Dichloropropane, and 1,1,2-Trichloroethane
1 Department of Civil and Environmental Engineering, Louisiana State University, 3513B Patrick Taylor Hall, Baton Rouge, LA, 70803, USA
2 Department of Biological Sciences, Louisiana State University, Baton Rouge, LA, 70803, USA
3 Department of Biological Sciences, University of Alaska Anchorage, Anchorage, AK, 99508, USA
4 Present address: Jun Yan, Department of Microbiology and Department of Civil and Environmental Engineering, University of Tennessee, Knoxville, TN, USA
AMB Express 2012, 2:54 doi:10.1186/2191-0855-2-54Published: 9 October 2012
The contaminant concentrations over which type strains of the species Dehalogenimonas alkenigignens and Dehalogenimonas lykanthroporepellens were able to reductively dechlorinate 1,2-dichloroethane (1,2-DCA), 1,2-dichloropropane (1,2-DCP), and 1,1,2-trichloroethane (1,1,2-TCA) were evaluated. Although initially isolated from an environment with much lower halogenated solvent concentrations, D. alkenigignens IP3-3T was found to reductively dehalogenate chlorinated alkanes at concentrations comparable to D. lykanthroporepellens BL-DC-9T. Both species dechlorinated 1,2-DCA, 1,2-DCP, and 1,1,2-TCA present at initial concentrations at least as high as 8.7, 4.0, and 3.5 mM, respectively. The ability of Dehalogenimonas spp. to carry out anaerobic reductive dechlorination even in the presence of high concentrations of chlorinated aliphatic alkanes has important implications for remediation of contaminated soil and groundwater.