Cr(VI) reduction by sulfidogenic and nonsulfidogenic microbial consortia

Y. Meriah Arias, Bradley M. Tebo

Research output: Contribution to journalArticle

45 Scopus citations

Abstract

In time course experiments, bacterial community compositions were compared between a sulfidogenic and two nonsulfidogenic Cr(VI)-reducing consortia enriched from metal-contaminated sediments. The consortia were subjected to 0 and 0.85 mM or 1.35 mM Cr(VI), and Cr(VI) reduction, growth, and denaturing gradient gel electrophoresis profiles of PCR products of small-subunit (16S) ribosomal genes were compared. Results showed that although Cr(VI) was completely reduced by the three consortia, Cr(VI) inhibited cell growth, with sulfate-reducing bacteria being particularly sensitive to Cr(VI) toxicity relative to other bacteria in the consortia.

Original languageEnglish (US)
Pages (from-to)1847-1853
Number of pages7
JournalApplied and Environmental Microbiology
Volume69
Issue number3
DOIs
StatePublished - Mar 1 2003

ASJC Scopus subject areas

  • Biotechnology
  • Food Science
  • Applied Microbiology and Biotechnology
  • Ecology

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