The continued study will help estimate how long it takes to decrease the level of
radiocesium in seafloor sediments near the Fukushima Daiichi Nuclear Power Plant.
The massive evacuation and strict monitoring of food appear to have successfully limited the amount
of radiocesium ingested by Fukushima residents.
After analyzing the data, researchers found
radiocesium from the Fukushima Daiichi Nuclear Power Plant accident in the sediment samples along with a high fraction of clay material, which is characteristic of shelf and slope sediments suggesting a near shore source.
The data also revealed that peak movements of the sediments
with radiocesium coincided with passing typhoons which likely triggered the resuspension of coastal sediments.
Last month, he and his colleagues reported finding no
detectable radiocesium in recently tested children and minimal levels in adults, suggesting that efforts to keep the food supply safe are working.
Anticipated for applications in the development of «superplants» for radiocesium decontamination
We'll then have a clearer picture of just how far, and just how much,
radiocesium from the Fukushima spill these animals were able to transport.
Citation: Virginie Sanial, Ken O. Buesseler, Matthew A. Charette, and Seiya Nagao; Unexpected source of Fukushima -
derived radiocesium to the coastal ocean of Japan; PNAS (October 2, 2017); DOI: 10.1073 / pnas.1708659114.
Also,
radiocesium in animals could demonstrate for the first time their migration from waters around Japan.
The public response to
the radiocesium in Pacific bluefin made it clear to us that, even though levels were low, consumers want to know what is in their fish.
This project ties into that question, as it is the incredible migratory nature of these animals that allows them to pick up
radiocesium and transport it thousands of miles away to distant ecosystems.