Desorption kinetics of cesium from Fukushima soils

Journal of Environmental Radioactivity
Kento MurotaSatoru Tanaka

Abstract

Understanding the behaviors of Cs(+) in soils is crucial for evaluation of the impacts of disposal of soils contaminated by radiocesium, (137)Cs. The desorption rate of Cs(+) evaluated in relatively short periods of time may not be adequate for such a purpose. In this study, we investigated long-term desorption kinetics of (137)Cs and (133)Cs from soils collected in Fukushima Prefecture by batch desorption experiments in the presence of cation exchange resin as a sorbent. The sorbent can keep the concentration of Cs(+) in the aqueous phase low and prevent re-sorption of desorbed Cs(+). Up to 60% of (137)Cs was desorbed after 139 d in dilute KCl media, which was larger than the desorption by conventional short-term extraction with 1 M ammonium acetate. Desorption of (137)Cs continued even after this period. It was also found that high concentration of K(+) prevented desorption of Cs(+) in the initial stage of desorption, but the effect was alleviated with time. The desorbed fraction of stable Cs was smaller than that of (137)Cs. This indicated that (137)Cs may gradually move to more stable states in soils. The half-life of (137)Cs desorption from the slowest sorption site was estimated to be at least two years by a three-site de...Continue Reading

References

Dec 29, 2007·Journal of Environmental Radioactivity·Hirofumi TsukadaJiro Inaba
Oct 28, 2011·Journal of Environmental Radioactivity·Hiroaki KatoMengistu Teramage
May 29, 2012·Scientific Reports·Shoji HashimotoKoji Shichi
Mar 27, 2013·Journal of Environmental Radioactivity·Akira TakedaShun'ichi Hisamatsu
May 28, 2013·The Science of the Total Environment·P ThakurR Nelson
Dec 3, 2013·Microscopy·Taiga OkumuraToshihiro Kogure
Apr 9, 2014·Environmental Science & Technology·Ana BenedictoAna María Fernández

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Citations

Sep 29, 2017·Physical Chemistry Chemical Physics : PCCP·Michel SassiKevin M Rosso
Jul 25, 2020·Environmental Geochemistry and Health·Sang-Min ParkKitae Baek
Feb 3, 2020·Journal of Colloid and Interface Science·Katherine TelfeyanS Doug Ware
Mar 11, 2021·Journal of Environmental Radioactivity·Hamza ChaifLaurent Garcia-Sanchez
May 20, 2021·Journal of Environmental Radioactivity·P CiffroyL Février
Nov 15, 2017·Environmental Science & Technology·Xiangbiao YinKenji Takeshita
Nov 15, 2021·The Science of the Total Environment·Yusuke UchiyamaYuichi Onda

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