Precipitation of Arsenic Trisulfide by Desulfotomaculum auripigmentum
نویسندگان
چکیده
منابع مشابه
Precipitation of Arsenic Trisulfide by Desulfotomaculum auripigmentum.
A newly discovered bacterium, Desulfotomaculum auripigmentum, precipitates arsenic trisulfide (As(inf2)S(inf3)). Precipitation of As(inf2)S(inf3) by this organism results from its reduction of As(V) to As(III) and S(VI) to S(-II). At the As(III) concentration range of interest (0.1 to 1 mM), the stability of As(inf2)S(inf3) is highly sensitive to pH and [S(-II)]. Thus, the relative rates at whi...
متن کاملSingle-step synthesis of silver sulfide nanocrystals in arsenic trisulfide
Silver sulfide nanocrystals and chalcogenide glasses (ChGs) are two distinct classes of semiconductor materials that have been exploited for new infrared technologies. Each one exhibits particular optoelectronic phenomena, which could be encompassed in a hybrid material. However, the integration of uniformly distributed crystalline phases within an amorphous matrix is not always an easy task. I...
متن کاملPrecipitation of Arsenic in Doped GaAs
Precipitation processes in the p-type, n-type, and intrinsic GaAs layers grown by molecular beam epitaxy at a low tempera ture were studied by transmission electron microscopy. The average spacing, average diameter, and volume fraction of precipitates were measured as a function of the annealing time for the annealing tempera ture of 700~ Volume fractions of precipitates are nearly constant in ...
متن کاملMicrobial Respiration and Precipitation of Arsenic
This dissertation explores the biogeochemistry, physiology, molecular biology, and environmental impact of dissimilatory arsenate reducing bacteria. A new species, Desulfotomaculum auripigmentum strain OREX-4, was found to precipitate amorphous arsenic trisulfide (AS2S3)both intraand extracellularly. Intracellular precipitation of AS2S3nucleates precipitation in the bulk milieu, and results fro...
متن کاملThiosulfate disproportionation by Desulfotomaculum thermobenzoicum.
Desulfotomaculum thermobenzoicum, but not Desulfotomaculum nigrificans, Desulfotomaculum ruminis, or Desulfosporosinus orientis, grew by disproportionation of thiosulfate, forming stoichiometric amounts of sulfate and sulfide; sulfite was not disproportionated. The addition of acetate enhanced growth and thiosulfate disproportionation by D. thermobenzoicum compared to those observed with thiosu...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Applied and Environmental Microbiology
سال: 1997
ISSN: 0099-2240,1098-5336
DOI: 10.1128/aem.63.5.2022-2028.1997