Effects of substrate type and arsenic dosage level on arsenic behavior in grassland microcosms. Part I. Preliminary results on /sup 74/As transport
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; TRN: 77-015329
- Resource Relation:
- Conference: Symposium on terrestrial microcosms and environmental chemistry, Corvallis, OR, USA, 13 Jun 1977
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ARSENIC 74
ENVIRONMENTAL EFFECTS
GRASS
RADIONUCLIDE MIGRATION
SOILS
TERRESTRIAL ECOSYSTEMS
BIOLOGICAL MODELS
ARSENIC
RADIATION DOSES
TRACER TECHNIQUES
ARSENIC ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BIOMASS
DAYS LIVING RADIOISOTOPES
DOSES
ECOSYSTEMS
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTS
ENERGY SOURCES
ENVIRONMENTAL TRANSPORT
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPE APPLICATIONS
ISOTOPES
MASS TRANSFER
NUCLEI
ODD-ODD NUCLEI
PLANTS
RADIOISOTOPES
RENEWABLE ENERGY SOURCES
SECONDS LIVING RADIOISOTOPES
SEMIMETALS
510300* - Environment
Terrestrial- Radioactive Materials Monitoring & Transport- (-1989)
560173 - Radiation Effects- Nuclide Kinetics & Toxicology- Plants- (-1987)