Generation of alkylarsines from soil
Products volatilized from arsenical-treated soil were identified and their rates of formation measured to determined if generation of alkylarsines by soils is part of a natural arsenic cycle. As-sodium arsenate, /sup 14/C-MSMA (monosodium methanearsonate), or /sup 14/C-cacodylic acid (hydroxydimethylarsine oxide), were added at 13.3 ..mu..Moles (10 ppmw As) to individual flasks containing 100 g of Mattapeake silt loam. Volatile arsine gases were produced under all conditions. The organo-arsenicals formed volatile compounds most quickly under aerobic conditions. The volatile gases were identified as dimethyl- and trimethylarsine (DMA and TMA) by ion exchange and gas chromatography, and mass spectroscopy. Most of the extractable arsenic remaining in the soil was present as a trimethyl arsenical compound regardless of the treatment. Since arsenic was transferred to air regardless of arsenical treatment, the transfer of arsenic from soil to air is part of the natural arsenic cycle in soils.
- Research Organization:
- Dept. of Agriculture, Beltsville, MD
- OSTI ID:
- 6484034
- Journal Information:
- Weed Sci.; (United States), Journal Name: Weed Sci.; (United States) Vol. 25:5; ISSN WEESA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Terrestrial-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ARSENIC
ARSENIC COMPOUNDS
CHEMICAL REACTIONS
CHEMISTRY
ELEMENTS
ENVIRONMENTAL TRANSPORT
GEOCHEMISTRY
MASS TRANSFER
ORGANIC ARSENIC COMPOUNDS
ORGANIC COMPOUNDS
SEMIMETALS
SOIL CHEMISTRY
SOILS