Dissolution of barium from barite in sewage sludges and cultures of Desulfovibrio desulfuricans

Article Abstract:

The sulfate-reducing bacteria Desulfovibrio desulfuricans dissolves barium (Ba) from barite (BaSO4) and increases the level of soluble Ba in cultures and sewage sludge from treatment plants. D. desulfuricans accumulates Ba when grown in cultures containing BaSO4 as the sole sulfate source. A lower concentration of accumulated Ba is probably due to the formation of other Ba compounds such as barium sulfide (BaS). The cultured bacterial cells form aggregates with BaSO4 and autofluorescent crystals of BaS.

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Toxicity of Al to Desulfovibrio desulfuricans

Article Abstract:

Research demonstrates that Al is toxic to Desulfovibrio desulfuricans G20 and perhaphs for other sulfate-reducing bacteria over a neutral-pH range at a concentration exceeding 5 X 10(sup)-5 molar. Data indicate that both the neutral and the monomeric anion are presumably toxic species of Al. Furthermore, at a concentration less than 5 X 10(sup)-5 molar, Al shifts the cell morphology from vibrio to spirilloid at pHs greater than 8.0.

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Identification of genes that confer sediment fitness to Desulfovibrio desulfuricans G20

Article Abstract:

The Desulfovibrio desulfuricans G20 genes seemingly important for fitness in aquifer sediments are identified and characterized. Results conclude that many of the identified genes have ubiquitously required characteristics.

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