AI Article Synopsis
- A study investigated radioactive cesium concentrations in suspended matter of coastal waters near the Fukushima Daiichi Nuclear Power Plant from January 2014 to August 2015, revealing much higher cesium levels compared to sediments.
- Highly radioactive cesium particles were identified in the suspended matter, with a maximum radioactivity of 0.6 Bq and an average of 0.2 Bq.
- These particles significantly contributed to cesium levels in the suspended matter, affecting about 36% on average and potentially delaying the removal of radioactive cesium from bottom-dwelling organisms.
Article Abstract
Radioactive cesium concentrations in the suspended matter of the coastal waters around the Fukushima Daiichi Nuclear Power Plant (FDNPP) were investigated between January 2014 and August 2015. The concentrations of radioactive cesium in the suspended matter were two orders higher in magnitude than those determined in the sediment. In addition, we discovered highly radioactive Cs particles in the suspended matter using autoradiography. The geometrical average radioactivity of particles was estimated to be 0.6 Bq at maximum and 0.2 Bq on average. The contribution ratio of highly radioactive Cs particles to each sample ranged from 13 to 54%, and was 36% on average. A major part of the radioactive Cs concentration in the suspended matter around the FDNPP was strongly influenced by the highly radioactive particles. The subsequent resuspension of highly radioactive Cs particles has been suggested as a possible reason for the delay in radioactive Cs depuration from benthic biota.
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| http://dx.doi.org/10.1016/j.marpolbul.2018.04.042 | DOI Listing |
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