141-1 Radioactive Fallout Removal From the Surface Soils By Enhancing Vertical Transport With Artificial Macropores.
Thus we applied artificial macropores to effectively remove radioactive fallout from the surface soil. Artificial macropore filled with bamboo fiber was introduced into soils (Field: d=1cm length=50cm, Lab: d=0.6cm, length=20cm). Zeolite was placed at the bottom of the macrpores (Field: 5cm, Lab: 3cm) to absorb transported radioactive Cesium. Four treatments were prepared such as macropore, macropore with ammonium sulfate, no macropore and no macropore with ammonium sulfate. 400mm artificial rainfall was applied in one month.
Results showed artificial macropore effectively transported radioactive Cesium to deeper profile while ammonium sulfate enhanced the amount of Cesium delivered to the deeper profile. No radioactive Cesium was observed from the drainage water. Field experiment showed significant reduction in macropore plots than no-macropore plots, however, it is not significant for ammonium sulfate plots.