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Volatilization of iodine from vegetation

Abstract

Gaseous emissions of iodine were measured from bean plant foliage. A gamma-emitting iodine tracer, Na {sup 125}I, was taken up by the plants from a hydroponic growth medium and released to a cuvette atmosphere. The dynamics of the flux were studied using a flow-through gamma detector. The relationship between leaf radioactive tracer activity and growth-medium activity was linear, as was the relationship between the iodine flux and both leaf and growth-medium activity. Iodine flux and leaf conductance to water responded similarly to changes in light levels, suggesting that the stomata may partially control the flux. The flux was inhibited by aeration of the hydroponic growth media, and we postulate that methylation causes the iodine flux. Iodine emissions from living vegetation probably contribute < 0.1% to the stable iodine concentration in the atmosphere above terrestrial areas. However, this pathway may be a direct route for radioactive iodine transport from contaminated soils to the atmosphere. (author).
Authors:
Amiro, B D; Johnston, F L [1] 
  1. Atomic Energy of Canada Ltd., Pinawa, MB (Canada). Whiteshell Nuclear Research Establishment
Publication Date:
Jan 01, 1989
Product Type:
Journal Article
Reference Number:
AIX-21-010239; EDB-90-011059
Resource Relation:
Journal Name: Atmospheric Environment; (UK); Journal Volume: 23:3
Subject:
54 ENVIRONMENTAL SCIENCES; IODINE 125; EARTH ATMOSPHERE; LEAVES; RADIONUCLIDE MIGRATION; BEANS; EVAPORATION; PLANTS; RADIONUCLIDE KINETICS; BETA DECAY RADIOISOTOPES; DAYS LIVING RADIOISOTOPES; ELECTRON CAPTURE RADIOISOTOPES; ENVIRONMENTAL TRANSPORT; FOOD; INTERMEDIATE MASS NUCLEI; IODINE ISOTOPES; ISOTOPES; MASS TRANSFER; NUCLEI; ODD-EVEN NUCLEI; PHASE TRANSFORMATIONS; RADIOISOTOPES; VEGETABLES; 540230* - Environment, Terrestrial- Radioactive Materials Monitoring & Transport- (1990-); 540130 - Environment, Atmospheric- Radioactive Materials Monitoring & Transport- (1990-)
OSTI ID:
5253969
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0004-6981; CODEN: ATENB
Submitting Site:
GBN
Size:
Pages: 533-538
Announcement Date:

Citation Formats

Amiro, B D, and Johnston, F L. Volatilization of iodine from vegetation. United Kingdom: N. p., 1989. Web. doi:10.1016/0004-6981(89)90002-4.
Amiro, B D, & Johnston, F L. Volatilization of iodine from vegetation. United Kingdom. doi:10.1016/0004-6981(89)90002-4.
Amiro, B D, and Johnston, F L. 1989. "Volatilization of iodine from vegetation." United Kingdom. doi:10.1016/0004-6981(89)90002-4. https://www.osti.gov/servlets/purl/10.1016/0004-6981(89)90002-4.
@misc{etde_5253969,
title = {Volatilization of iodine from vegetation}
author = {Amiro, B D, and Johnston, F L}
abstractNote = {Gaseous emissions of iodine were measured from bean plant foliage. A gamma-emitting iodine tracer, Na {sup 125}I, was taken up by the plants from a hydroponic growth medium and released to a cuvette atmosphere. The dynamics of the flux were studied using a flow-through gamma detector. The relationship between leaf radioactive tracer activity and growth-medium activity was linear, as was the relationship between the iodine flux and both leaf and growth-medium activity. Iodine flux and leaf conductance to water responded similarly to changes in light levels, suggesting that the stomata may partially control the flux. The flux was inhibited by aeration of the hydroponic growth media, and we postulate that methylation causes the iodine flux. Iodine emissions from living vegetation probably contribute < 0.1% to the stable iodine concentration in the atmosphere above terrestrial areas. However, this pathway may be a direct route for radioactive iodine transport from contaminated soils to the atmosphere. (author).}
doi = {10.1016/0004-6981(89)90002-4}
journal = {Atmospheric Environment; (UK)}
volume = {23:3}
journal type = {AC}
place = {United Kingdom}
year = {1989}
month = {Jan}
}