Concentration and specific activity of fallout 137Cs in extracted and particle-size fractions of cultivated soils

Radionuclides Released from Nuclear Accidents: Distribution and Dynamics in Soil

“…This result is attributed to smaller particles with larger specific surface area giving more sorption sites for Cs (He and Walling 1996) and strongly sorbing onto clay minerals (Sawhney 1972;Maes and Cremers 1986;Cornel 1993). Tsukada et al (2008) reported similar results with fallout-derived 137 Cs in agricultural soils in Aomori Prefecture, Japan in 1991, 1992, 1994, and 2004. The radioactivity of 137 Cs in the clay-size fraction after removing the oxidizable organic-bound fraction was highest among the particle-size fractions for agricultural soils.…”

The Simulation of long-range transport of 137Cs by yellow sand phenomena in East Asia

“…Tsukada (2008) 6) , however, suggests that the 137 Cs concentration increases as the particle size decreases. Further research of soil particle size will improve calculation conditions and induce less underestimation of actual 137 Cs deposition.…”

Change of the Asian dust source region deduced from the composition of anthropogenic radionuclides in surface soil in Mongolia

“…Sieving with a finer mesh is needed to achieve higher precision in the measurements of specific activity. However, finer soil particles will exhibit higher specific activity not only for 137 Cs (Tsukada et al, 2008) but also for 90 Sr, which is controlled by the total particle surface area over the mass; thus, it is unlikely that there would be a substantial change in the 137 Cs/ 90 Sr ratio. Therefore, the present conclusion is also not likely to change substantially.…”