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).
Amiro, B D;
Johnston, F L
[1]
- Atomic Energy of Canada Ltd., Pinawa, MB (Canada). Whiteshell Nuclear Research Establishment
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.
https://doi.org/10.1016/0004-6981(89)90002-4
Amiro, B D, and Johnston, F L.
1989.
"Volatilization of iodine from vegetation."
United Kingdom.
https://doi.org/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 = []
volume = {23:3}
journal type = {AC}
place = {United Kingdom}
year = {1989}
month = {Jan}
}
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 = []
volume = {23:3}
journal type = {AC}
place = {United Kingdom}
year = {1989}
month = {Jan}
}