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- W2062433232 abstract "Cultures of the sulfate reducing bacteria Desulfovibrio desulfuricans were grown under anoxic conditions to study the effect of added sulfide, selenite and mercuric ions. A chemical trap consisting in a CuSO4 solution was used to control the poisoning effect induced by the bacterial production of hydrogen sulfide via the precipitation of CuS. Following the addition of Hg2 +, the formation of methylmercury (MeHg) was correlated to bacterial proliferation with most of MeHg found in the culture medium. A large fraction (50–80%) of added Hg2 + to a culture ended up in a solid phase (Hg0 and likely HgS) limiting its bioavailability to cells with elemental Hg representing ~ 40% of the solid. Following the addition of selenite, a small fraction was converted into Se(0) inside the cells and, even though the conversion to this selenium species increased with the increase of added selenite, it never reached more than 49% of the added amount. The formation of volatile dimethylselenide is suggested as another detoxification mechanism. In cultures containing both added selenite and mercuric ions, elemental forms of the two compounds were still produced and the increase of selenium in the residual fraction of the culture suggests the formation of mercuric selenite limiting the bioavailability of both elements to cells." @default.
- W2062433232 created "2016-06-24" @default.
- W2062433232 creator A5030056634 @default.
- W2062433232 creator A5034969040 @default.
- W2062433232 creator A5081859058 @default.
- W2062433232 date "2013-04-01" @default.
- W2062433232 modified "2023-10-18" @default.
- W2062433232 title "Effect of sulfide, selenite and mercuric mercury on the growth and methylation capacity of the sulfate reducing bacterium Desulfovibrio desulfuricans" @default.
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- W2062433232 doi "https://doi.org/10.1016/j.scitotenv.2013.01.054" @default.
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