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Revista Latinoamericana de Microbiología

2007, Number 3-4

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Microbiología 2007; 49 (3-4)

Utilization of phenol in the presence of heavy metals by metal-tolerant nonfermentative gram-negative bacteria isolated from wastewater

Lima SAA, Pontes PM, Silva FRG, Ernesto Hofer E

Language: English
References: 30
Page: 68-73
PDF size: 134.40 Kb.


ABSTRACT

Strains of Cr-tolerant or Hg-tolerant Gram-negative bacteria were isolated from Chemistry School’s sewage water and these were studied in relation to their ability to use phenol as sole carbon source in the presence of K2Cr2O7 and HgCl2. These metals showed inhibitory effect in the assimilation of this aromatic compound. However, one Cr-tolerant strain (Burkholderia cepacia - JT50) got phenol metabolized in the presence of high concentration of K2Cr2O7 (until concentration of 200 µg/ml). Additional investigation of this strain in minimum medium with phenol and chromate indicated that the tolerance mechanism did not involve chemical reduction from Cr6+ to Cr3+, neither any changes in the total-chromium levels in that medium.


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