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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Bioremediation of polychlorinated biphenyl-contaminated soil using carvone and surfactant-grown bacteria.

Partial bioremediation of polychlorinated biphenyl (PCB)-contaminated soil was achieved by repeated applications of PCB-degrading bacteria and a surfactant applied 34 times over an 18-week period. Two bacterial species, Arthrobacter sp. strain B1B and Ralstonia eutrophus H850, were induced for PCB degradation by carvone and salicylic acid, respectively, and were complementary for the removal of different PCB congeners. A variety of application strategies was examined utilizing a surfactant, sorbitan trioleate, which served both as a carbon substrate for the inoculum and as a detergent for the mobilization of PCBs. In soil containing 100 microg Aroclor 1242 g(-1) soil, bioaugmentation resulted in 55-59% PCB removal after 34 applications. However, most PCB removal occurred within the first 9 weeks. In contrast, repeated addition of surfactant and carvone to non-inoculated soil resulted in 30-36% PCB removal by the indigenous soil bacteria. The results suggest that bioaugmentation with surfactant-grown, carvone-induced, PCB-degrading bacteria may provide an effective treatment for partial decontamination of PCB-contaminated soils.[1]


  1. Bioremediation of polychlorinated biphenyl-contaminated soil using carvone and surfactant-grown bacteria. Singer, A.C., Gilbert, E.S., Luepromchai, E., Crowley, D.E. Appl. Microbiol. Biotechnol. (2000) [Pubmed]
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