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Sunflowers To Clean Radioactive Soil?
Maybe Not A Good Idea

From TC Burnett
I'll point out the problem just in case it isn't obvious to everyone...
Sunflowers To Clean Up Radioactive Soil
The Yomiuri Shimbun
Japanese researchers who study space agriculture believe growing sunflowers will remove radioactive cesium from contaminated soil around the Fukushima No.1 nuclear power plant, and are planning a project to plant as many of the yellow flowers as possible this year.
They have invited people to sow sunflower seeds near the Fukushima Prefecture power station, hoping the sunflower will become a symbol of recovery in the areas affected by the nuclear crisis.
After the sunflowers are harvested, they will be decomposed with bacteria, according to a plan by a Japan Aerospace Exploration Agency group led by Prof. Masamichi Yamashita.
After the 1986 Chernobyl nuclear disaster, sunflowers and rape blossoms were used to decontaminate soil in Ukraine. Radioactive cesium is similar to kalium, a commonly used fertilizer. If kalium is not present, sunflowers will absorb cesium instead.
If the harvested sunflowers are disposed of by burning them, radioactive cesium could be dispersed through smoke, which is why the researchers are considering using hyperthermophilic aerobic bacteria--used to produce compost--to decompose the plants.
*** The decomposing process will reduce the sunflowers to about 1 percent of their previous volume, which will slash the amount of radioactive waste that needs to be dealt with.  NO, IT WON'T! IT WILL MERELY CONCENTRATE IT into flower detritus so it can move up the food chain more easily!
The group has gathered about 300 kilograms of sunflower seeds and has also asked Thailand, a major producer of sunflower seeds, for cooperation in the project.
They also plan to ask high schools in and near the 30-kilometer zone around the Fukushima plant to grow sunflowers on their school grounds. Kanagawa prefectural Hiratsuka Agricultural High School has agreed to produce seedlings.
"We're still in the process of planning for the decomposition facility and some other things. Looking toward the autumn harvest, we'd like as many people as possible to join the project," Yamashita said.
For details about the project, see <http://surc.isas.jaxa.jp/space_agriculture/>http://surc.isas.jaxa.jp/space_agriculture/
(in Japanese)  Apr. 23, 2011
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