Estimation of desorption ratios of radio/stable caesium from environmental samples (aerosols and soils) leached with seawater, diluted seawater and ultrapure water

Copyright © 2017 by The Geochemical Society of Japan. rest of the released 137Cs went out to the ocean. The radioactive aerosols were scavenged from the atmosphere to the ocean surface by dry and wet depositions, with the result that the deposition has increased the concentration of radio Cs in the surface seawater extensively (Aoyama et al., 2016; Kaeriyama, 2016; and references therein). Although radio Cs was in the uppermost surface layer and existed predominantly as dissolved species shortly after the FDNPP accident (e.g., Buesseler et al., 2012; Honda et al., 2012), it has since been realised that particles, with activity 4–5 orders of magnitude higher than that of the surface layer’s suspended solids observed in their papers, had been scavenged/served to the sea bed with large sinking velocities (200–400 m/day) (Honda et al., 2013; Honda and Kawakami, 2014). In addition, suspended solids, which have small deposition rates and Estimation of desorption ratios of radio/stable caesium from environmental samples (aerosols and soils) leached with seawater, diluted seawater and ultrapure water