Effects of substrate type and arsenic dosage level on arsenic behavior in grassland microcosms. Part I. Preliminary results on /sup 74/As transport
Conference
·
OSTI ID:7319596
Microcosm design is an important factor in interpreting results obtained from studies of the environmental effects, mobility and persistence of contaminants. The behavior of pentavalent arsenic and a radioarsenic tracer was studied in three substrate types exposed to differing levels of stable As dosage. Soil cores excised intact from a natural grassland ecosystem were considered to most reliably represent the natural system under study since they retained the soil structure, and closely simulated the abiotic and biotic complexity, of the grassland ecosystem. The behavior of /sup 74/As in the components of intact soil core microcosms differed appreciably from that observed for the other microcosm types where soil underwent manipulation. These differences were explained primarily on the basis of differences in soil structure.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 7319596
- Report Number(s):
- CONF-770647-1
- Country of Publication:
- United States
- Language:
- English
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510300* -- Environment
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INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPE APPLICATIONS
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ODD-ODD NUCLEI
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Terrestrial-- Radioactive Materials Monitoring & Transport-- (-1989)
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63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
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ARSENIC ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BIOLOGICAL MODELS
BIOMASS
DAYS LIVING RADIOISOTOPES
DOSES
ECOSYSTEMS
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTS
ENERGY SOURCES
ENVIRONMENTAL EFFECTS
ENVIRONMENTAL TRANSPORT
GRASS
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPE APPLICATIONS
ISOTOPES
MASS TRANSFER
NUCLEI
ODD-ODD NUCLEI
PLANTS
RADIATION DOSES
RADIOISOTOPES
RADIONUCLIDE MIGRATION
RENEWABLE ENERGY SOURCES
SECONDS LIVING RADIOISOTOPES
SEMIMETALS
SOILS
TERRESTRIAL ECOSYSTEMS
TRACER TECHNIQUES