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Dual augmentation for aerobic bioremediation of MTBE and TCE pollution in heavy metal-contaminated soil
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Orientador(es)
Resumo(s)
In this work we isolated from soil and
characterized several bacterial strains capable of
either resisting high concentrations of heavy metals
(Cd2+ or Hg2+ or Pb2+) or degrading the common
soil and groundwater pollutants MTBE (methyl-tertbutyl
ether) or TCE (trichloroethylene). We then used
soil microcosms exposed to MTBE (50 mg/l) or TCE
(50 mg/l) in the presence of one heavy metal (Cd 10
ppm or Hg 5 ppm or Pb 50 or 100 ppm) and two
bacterial isolates at a time, a degrader plus a metalresistant
strain. Some of these two-membered consortia
showed degradation efficiencies well higher
(49–182% higher) than those expected under the
conditions employed, demonstrating the occurrence
of a synergetic relationship between the strains used.
Our results show the efficacy of the dual augmentation
strategy for MTBE and TCE bioremediation in
the presence of heavy metals.
Descrição
Palavras-chave
Bioremediation Soil Heavy metal TCE MTBE Cadmium Lead Mercury
Contexto Educativo
Citação
Editora
Springer