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Title: Seasonal variation of soil-to-plant transfer of K and fallout sup 134,137 Cs in peatland vegetation

Abstract

For three plants from a peat bog (Trichophorum caespitosum, Molinia coerulea, Calluna vulgaris) the concentration of 137Cs, the ratio 137Cs:134Cs, and stable K was determined in intervals of about 14 d from June to November 1987. The results show that for two grasses, Trichophorum caespitosum and Molinia coerulea (which have only perennial roots but sprout every year while the old leaves wither), the concentration of 137Cs decreased considerably during the growing season (1800-240, respectively, 4000-320 Bq kg-1 dry weight). A remarkably similar behavior was observed for the seasonal variability of K and radiocesium in the two grass species, which resulted in a nearly constant ratio of 137Cs:K during the year. In contrast, for the evergreen plant Calluna vulgaris (heather) which was contaminated surficially by the Chernobyl fallout, the concentrations of K and 137Cs were rather constant during 1987 (leaves about 10,000; stems about 5000 Bq kg-1 dry weight), even though radiocesium was taken up by the leaves and transported within the plant. For the two grasses, the plant:soil concentration ratios (CR) were obtained separately for total 137Cs, 137Cs from the global fallout, and Chernobyl-derived 137Cs. The CR of 137Cs from the global fallout decreased for Trichophorum caespitosum from 1.9 inmore » the spring to 0.08 in the autumn, and for Chernobyl-derived 137Cs from 1.4 to 0.2. For Molinia coerulea, a similar behavior was observed. Possible reasons for the seasonal variability of the CR values and the different behavior of 137Cs from the global fallout and from the Chernobyl debris are discussed.« less

Authors:
;  [1]
  1. (Institut fuer Strahlenschutz, Neuherberg (Germany, F.R.))
Publication Date:
OSTI Identifier:
5230506
Resource Type:
Journal Article
Resource Relation:
Journal Name: Health Physics; (USA); Journal Volume: 57:4
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; CESIUM 134; RADIOECOLOGICAL CONCENTRATION; CESIUM 137; PLANTS; CONTAMINATION; SOILS; CHERNOBYLSK-4 REACTOR; GLOBAL FALLOUT; GRASS; ISOTOPE RATIO; POTASSIUM; RADIONUCLIDE MIGRATION; SEASONAL VARIATIONS; ALKALI METAL ISOTOPES; ALKALI METALS; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CESIUM ISOTOPES; ECOLOGICAL CONCENTRATION; ELEMENTS; ENRICHED URANIUM REACTORS; ENVIRONMENTAL TRANSPORT; FALLOUT; GRAPHITE MODERATED REACTORS; HOURS LIVING RADIOISOTOPES; INTERNAL CONVERSION RADIOISOTOPES; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; LILIOPSIDA; LWGR TYPE REACTORS; MAGNOLIOPHYTA; MASS TRANSFER; METALS; NUCLEI; ODD-EVEN NUCLEI; ODD-ODD NUCLEI; POWER REACTORS; RADIOISOTOPES; REACTORS; THERMAL REACTORS; VARIATIONS; WATER COOLED REACTORS; YEARS LIVING RADIOISOTOPES; 540230* - Environment, Terrestrial- Radioactive Materials Monitoring & Transport- (1990-); 560162 - Radionuclide Effects, Kinetics, & Toxicology- Animals, Plants, Microorganisms, & Cells

Citation Formats

Bunzl, K., and Kracke, W. Seasonal variation of soil-to-plant transfer of K and fallout sup 134,137 Cs in peatland vegetation. United States: N. p., 1989. Web. doi:10.1097/00004032-198910000-00011.
Bunzl, K., & Kracke, W. Seasonal variation of soil-to-plant transfer of K and fallout sup 134,137 Cs in peatland vegetation. United States. doi:10.1097/00004032-198910000-00011.
Bunzl, K., and Kracke, W. 1989. "Seasonal variation of soil-to-plant transfer of K and fallout sup 134,137 Cs in peatland vegetation". United States. doi:10.1097/00004032-198910000-00011.
@article{osti_5230506,
title = {Seasonal variation of soil-to-plant transfer of K and fallout sup 134,137 Cs in peatland vegetation},
author = {Bunzl, K. and Kracke, W.},
abstractNote = {For three plants from a peat bog (Trichophorum caespitosum, Molinia coerulea, Calluna vulgaris) the concentration of 137Cs, the ratio 137Cs:134Cs, and stable K was determined in intervals of about 14 d from June to November 1987. The results show that for two grasses, Trichophorum caespitosum and Molinia coerulea (which have only perennial roots but sprout every year while the old leaves wither), the concentration of 137Cs decreased considerably during the growing season (1800-240, respectively, 4000-320 Bq kg-1 dry weight). A remarkably similar behavior was observed for the seasonal variability of K and radiocesium in the two grass species, which resulted in a nearly constant ratio of 137Cs:K during the year. In contrast, for the evergreen plant Calluna vulgaris (heather) which was contaminated surficially by the Chernobyl fallout, the concentrations of K and 137Cs were rather constant during 1987 (leaves about 10,000; stems about 5000 Bq kg-1 dry weight), even though radiocesium was taken up by the leaves and transported within the plant. For the two grasses, the plant:soil concentration ratios (CR) were obtained separately for total 137Cs, 137Cs from the global fallout, and Chernobyl-derived 137Cs. The CR of 137Cs from the global fallout decreased for Trichophorum caespitosum from 1.9 in the spring to 0.08 in the autumn, and for Chernobyl-derived 137Cs from 1.4 to 0.2. For Molinia coerulea, a similar behavior was observed. Possible reasons for the seasonal variability of the CR values and the different behavior of 137Cs from the global fallout and from the Chernobyl debris are discussed.},
doi = {10.1097/00004032-198910000-00011},
journal = {Health Physics; (USA)},
number = ,
volume = 57:4,
place = {United States},
year = 1989,
month =
}