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A COMPREHENSIVE FEASIBILITY STUDY OF EFFECTIVENESS AND ENVIRONMENTAL IMPACT OF PAH BIOREMEDIATION USING AN INDIGENOUS MICROBIAL DEGRADER CONSORTIUM AND A NOVEL STRAIN STENOTROPHOMONAS MALTOPHILIA CPHE1 ISOLATED FROM AN INDUSTRIAL POLLUTED SOIL
Lara-Moreno, A., E. Morillo, F. Merchan, and J. Villaverde.
Journal of Environmental Management 289:112512(2021)
Filed Under: Research
Filed Under: Research
The capacity of an isolated soil microbial consortium (OMC) to biodegrade PAHs was assessed. OMC was able to reach 100% biodegradation of naphthalene, acenaphthylene, acenaphthene, fluorene, and phenanthrene in solution, and up to 76% and 50% of anthracene and fluoranthene, respectively, from a mix of 16 PAHs. A novel Stenotrophomonas maltophilia CPHE1, not previously described as a PAH degrader, was able to mineralize almost 40% phenanthrene (PHE) and biodegrade 90.5% in solution. Based on metabolites identified during PHE degradation and on the detection of two genes (PAH RHDα and nahAc) in OMC consortium, salicylic and phthalic acid were considered as two possible mechanisms for PHE degradation. PAH RHDα, which codified the first step on PHE biodegradation pathway, was also found in the DNA of S. maltophilia CPHE1. An ecotoxicology study showed that inoculating PHE-contaminated solution with S. maltophilia CPHE1 for 30 days decreased the solution toxicity by half.
Journal of Environmental Management 289:112512(2021)
Filed Under: Research
Filed Under: Research
The capacity of an isolated soil microbial consortium (OMC) to biodegrade PAHs was assessed. OMC was able to reach 100% biodegradation of naphthalene, acenaphthylene, acenaphthene, fluorene, and phenanthrene in solution, and up to 76% and 50% of anthracene and fluoranthene, respectively, from a mix of 16 PAHs. A novel Stenotrophomonas maltophilia CPHE1, not previously described as a PAH degrader, was able to mineralize almost 40% phenanthrene (PHE) and biodegrade 90.5% in solution. Based on metabolites identified during PHE degradation and on the detection of two genes (PAH RHDα and nahAc) in OMC consortium, salicylic and phthalic acid were considered as two possible mechanisms for PHE degradation. PAH RHDα, which codified the first step on PHE biodegradation pathway, was also found in the DNA of S. maltophilia CPHE1. An ecotoxicology study showed that inoculating PHE-contaminated solution with S. maltophilia CPHE1 for 30 days decreased the solution toxicity by half.
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