Microbial formation of volatile selenium compounds in soil
Selenium was volatilized from soils amended with elemental Se, selenite, selenate, trimethylselenonium chloride, selenomethionine, and selenocystine and incubated in air or anaerobically. The processes were wholly or largely the result of microbial action. The conversion of selenite and selenate to volatile products was enhanced if soil was amended with organic materials. Indigenous soil Se was also volatilized in the presence of supplemental organic matter. The products were identified by combined gas chromatography-mass spectrometry. Dimethyl selenide was generated from all Se compounds tested when amended soils were incubated in the presence of air. Under anaerobic conditions, dimethyl selenide was produced from the three organic Se compounds and selenate, and a product tentatively identified as hydrogen selenide (H/sub 2/Se) was evolved from soil receiving elemental Se, selenite, selenate, or selenocystine. Dimethyl diselenide was also formed from selenomethionine in soil incubated in air or anaerobically. 18 references, 3 figures, 2 tables.
- Research Organization:
- Univ. of Nebraska, Lincoln
- OSTI ID:
- 6530370
- Journal Information:
- Soil Sci. Soc. Am. J.; (United States), Journal Name: Soil Sci. Soc. Am. J.; (United States) Vol. 41:1; ISSN SSSJD
- Country of Publication:
- United States
- Language:
- English
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Terrestrial-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
550500 -- Metabolism
59 BASIC BIOLOGICAL SCIENCES
ANAEROBIC CONDITIONS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
CHROMATOGRAPHY
DATA
ELEMENTS
EXPERIMENTAL DATA
GAS CHROMATOGRAPHY
INFORMATION
MASS SPECTROSCOPY
METABOLISM
METHYLATION
MICROORGANISMS
MINERAL CYCLING
NUMERICAL DATA
ORGANIC MATTER
OXYGEN COMPOUNDS
SELENATES
SELENIDES
SELENIUM
SELENIUM COMPOUNDS
SEMIMETALS
SEPARATION PROCESSES
SOIL CHEMISTRY
SOILS
SPECTROSCOPY
VOLATILITY