Sorption-desorption coefficients of uranium in contaminated soils collected around Fukushima Daiichi Nuclear Power Station

Various radionuclides including fission products and heavy nuclides were released into the environment during Fukushima Daiichi Nuclear Power Station (FDNPS) accident. The dissolution followed by migration of deposited Cs, Sr U on soils could take place to local environment. Therefore, it is necessary determine sorption-desorption coefficients in soil-water system around FDNPS from a viewpoint. determination sorption coefficient Kd(S) as well desorption Kd(D) for has been carried out present study using laboratory batch method. Stable was used simulated ground water onto contaminated soil samples collected Okuma Town, Fukushima. Different parameters measured understand their effects processes. obtained values compared with Cs Kd(S)–U known accident reported literature better understanding. It observed that varied 160 5100 L/kg, whereas Kd(D)-U ranged 200 11000 L/kg. higher than these implying irreversibility process. Pearson's correlation suggested affected various parameters. However, decided nature species formed process like pH, presence carbonates, Ca ions, clay minerals etc. some extent. comparison between revealed unsorbed migrate farther or under experimental conditions. Both studies are great importance metal ions sites uncontaminated areas.