Sorption and desorption experiments using stable cesium: considerations for radiocesium retention by fresh plant residues in Fukushima forest soils

• Published in: Journal of radioanalytical and nuclear chemistry Vol. 329; no. 1; pp. 213 - 224
• Main Authors: Manaka, Takuya, Ohashi, Shinta, Ogo, Sumika, Otsuka, Yuichiro, Furusawa, Hitomi
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01.07.2021; Springer; Springer Nature B.V
• Subjects: Analysis; Bark; Cellulose; Cesium; Cesium 133; Cesium 134; Cesium 137; Cesium isotopes; Chemistry; Chemistry and Materials Science; Clay minerals; Desorption; Diagnostic Radiology; Experiments; Forest soils; Hadrons; Heavy Ions; Inorganic Chemistry; Nuclear Chemistry; Nuclear Physics; Organic matter; Physical Chemistry; Residues; Sorption; Vermiculite; Cesium; Organic matter; Sorption and desorption; Fukushima Dai-ichi nuclear power plant accident; Vermiculite; Forest soils
• ISSN: 0236-5731; 1588-2780
• DOI: 10.1007/s10967-021-07749-1

We conducted sorption experiments with stable cesium ( 133 Cs) solution in different organic matter samples, aiming to understand the sorption of radiocesium ( 134 Cs and 137 Cs) in the initial throughfall by fresh plant residues (e.g., needles, wood, and bark from Japanese cedar trees) in the Oi horizon in forests in Fukushima. Among the organic matter samples, bark and wattle tannin sorbed relatively large amounts of Cs, whereas wood and cellulose powder sorbed small amounts. In contrast, samples containing clay minerals showed much higher Cs sorption. We also conducted desorption experiments, and suggested that Cs on the organic matter samples were relatively mobile.