Document Details


Title:
RADIOCESIUM CYCLING IN VEGETATION AND SOIL ( MINERAL CYCLING IN SOUTHEASTERN ECOSYSTEMS, ERDA SYMPOSIUM SERIES, CONF-740513, 1975, PP. 462-481, PUBLICATION NO. 748 )
Author(s):
DAHLMAN, R C [ENERGY RESEARCH AND DEVELOPMENT ADMINISTRATION, U.S.]; FRANCIS, C W [ENERGY RESEARCH AND DEVELOPMENT ADMINISTRATION, U.S.]; TAMURA, T [ENERGY RESEARCH AND DEVELOPMENT ADMINISTRATION, U.S.]
Subject Terms:
DEPOSITION; GRAPHS; UPTAKE; CESIUM 137; RADIONUCLIDE KINETICS; ACTIVITY LEVELS; CORRELATIONS; SOILS; ABSORPTION; RESEARCH PROGRAMS; MILK; PLANTS; CLAYS
Document Location:
Location - NNSA/NSO Nuclear Testing Archive Address - P.O. Box 98521 City - Las Vegas State - NV Zip - 89193-8521 Phone - (702)794-5106 Fax - (702)862-4240 Email - CIC@NV.DOE.GOV
Document Type:
JOURNAL ARTICLE
Publication Date:
1975 Dec 31
Declassification Status:
Never classified
Document Pages:
0020
Accession Number:
NV0067572
OpenNet Entry Date:
1994 Aug 26
Description/Abstract:
DATA ON CESIUM DYNAMICS IN VEGETATION AND SOILS ARE REVIEWED. SPECIAL EMPHASIS IS PLACED ON TYPICAL ENVIRONMENTS IN THE SOUTHEASTERN UNITED STATES. CLAY MINERALS OF SOIL, ESPECIALLY MICACEOUS TYPES, EFFECTIVELY FIX CESIUM AND REMOVE IT FROM BIOTIC COMPONENTS OF ECOSYSTEMS. FALLOU T CESIUM-137 ENTERS FOOD CHAINS PRINCIPALLY BY DIRECT DEPOSITION ON VE GETATION; UPTAKE BY THE ROOT PATHWAY IS USUALLY LESS THAN DIRECT CONTA MINATION OF PLANT FOLIAGE. CESIUM-137 LEVELS IN VEGETATION OF THE SOUT HEASTERN U.S. COASTAL PLAIN ARE ESTIMATED ON THE BASIS OF DIRECT DEPOS ITION FROM THE ATMOSPHERE AND ROOT UPTAKE FROM SOIL. ESTIMATED CONCENT RATIONS, BASED ON CURRENT CONCEPTS OF CESIUM-137 DYNAMICS IN VEGETATIO N AND FIXATION IN SOIL, ARE IN GOOD AGREEMENT WITH OBSERVED VALUES OF CESIUM-137 IN VVEGETATION COLLECTED 1969 AND 1970. MECHANISMS OF DIREC T DEOSITION AND OF INCREASED UPTAKE BY ROOTS DUE TO THE ABSENCE OF MIC ACEOUS CLAYS ADEQUATELY EXPLAIN THE HIGHER LEVELS OF CESIUM-137 IN VEG ETATION OF THE COASTAL PLAIN AND THUS ARE RESPONSIBLE FOR THE ELEVATED CESIUM-137 REPORTED FOR MILK OF THE TAMPA, FLA, MILKSHED.


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