Distribution of⁹⁰Sr Activities in the Environmental Radiation Samples of Jeju Island, Korea

Abstract

Background: This work was to get information about 90 Sr contamination of the environment by using soil and moss from selected areas in Jeju Island, Korea. Materials and Methods: The activities of 90 Sr in soil and moss samples were investigated at nine locations of Jeju island, Korea. The soil samples have been collected at 4 sites of Jeju island during June to August of 2013, analyzed for vertical distribution of 90 Sr activities. The moss samples have been collected at 5 sites of Jeju island during November of 2011 to June of 2012, and analyzed for radioactive 90 Sr. Results and Discussion: The 90 Sr vertical concentrations in the investigated soil samples were 2.77 to 18.24 Bq•kg-1 in eastern part, 1.69 to 18.27 Bq•kg-1 in northern part, 3.76 to 13.46 Bq•kg-1 in the western part and 1.09 to 8.70 Bq•kg-1 in the southern part of the Mt. Halla in Jeju island, respectively. Activities of 90 Sr show the highest value at the surface soil and decrease with depth. The activity concentration measured was in the range of 79.6 to 363 Bq•kg-1-dry moss. Conclusion: This material is expected to be basis reference for survey of environmental radioactivity in Jeju Island.

On the use of a multi-site ion-exchange model to predictively simulate the adsorption behaviour of strontium and caesium onto French agricultural soils

“…-3 - 90 Sr and 137 Cs are well known to have a low mobility in soils (Han et al, 2016;Mishra et al, 2016) due to their strong interactions with clay minerals (Adeleye et al, 1994;Baborova et al, 2018;Durrant et al, 2018;Dyer et al, 2000;Sawhney, 1970;Semenkova et al, 2018), out of which illite and vermiculite are known to be the most selective adsorbents for Cs + (Durrant et al, 2018;Dzene et al, 2015). This high adsorption is due to the weak hydration energy of Cs + (Marcus, 1985) and mainly attributed to the existence of low concentration high affinity sites, usually referred as frayed edge sites (FES) on illite (Cornell, 1993;Sawhney, 1972).…”