Selective removal of radiocesium from micaceous clay for post-accident soil decontamination by temperature-controlled Mg-leaching in a column

Application of polyethylenimine-coated magnetic nanocomposites for the selective separation of Cs-enriched clay particles from radioactive soil

“…11,14,15 The Cs adsorbed on FES diffuses into deeper into the interlayers by Cs dehydration and then readily exchanges with neighboring K. Consequently, this trapped Cs is difficult to remove from clay because it is tightly bound in between two tetrahedral sheets. 4,16,17 For the contaminated soil in Fukushima, it has been reported that the <5 mm size fraction accounts for approximately 7% of the topsoil (0-10 cm); the Cs distribution is higher in this fraction than in silt and sand, which make up the majority of the rest of the topsoil. 18 For this reason, the removal of ne particles could lower radioactivity of the remaining soil.…”