Characterization of an enriched acidophilic sulfate-reducing bacteria community from the sediment of a uranium mine (Minas Gerais-Brazil).

Acidophilic sulfate-reducing bacteria (SRB) are anaerobic microorganisms capable of precipitating metals and raising pH levels in acidic drainage waters. Limited genera have been isolated from acidic sediments. This study aimed to characterize enrichment cultures of acidophilic SRB communities found in uranium mine sediments in Minas Gerais, Brazil.

Effects of metals on activity and community of sulfate-reducing bacterial enrichments and the discovery of a new heavy metal-resistant SRB from Santos Port sediment (São Paulo, Brazil).

Sulfate-reducing bacteria (SRB) can be used to remove metals from wastewater, sewage, and contaminated areas. However, metals can be toxic to this group of bacteria. Sediments from port areas present abundance of SRB and also metal contamination.

Heavy metal concentrations in Brazilian port areas and their relationships with microorganisms: can pollution in these areas change the microbial community?

The objectives of this study were to analyze the difference in ways in which metals polluting Brazilian port areas influence bacterial communities and the selection of resistant strains. The hypothesis tested was that port areas would have microbial communities significantly different from a pristine area, mainly due to a greater load of metals found in these areas. Sediment samples were collected in two port areas (Santos and São Sebastião) and one pristine area (Ubatuba).