Oxidation of Solid Phase and Ionic Strength Effect to the Cesium Adsorption on Pumice Tuff

• DOI: 10.4236/gep.2016.42008
• Publication Date: 2016-02-22T08:33:19Z
• Authors: Mohammad Rajib; Taishi Kobayashi; Chiaki T. Oguchi; Takayuki Sasaki
• Keywords: Pumice

In-situ oxidation of solid phase was considered to investigate adsorption behavior under different geochemical parameters like pH, initial concentration and ionic strength. Pumice tuff, a potential host rock for low intermediate radioactive wastes, has been affected by the redox zone. The characterization fresh oxidized tuff performed X-ray diffractometer, scanning electron microscope mercury intrusion porosimetry. In order compare difference distribution coefficient (Kd) in pumice tuffs, batch study carried out at range pH (4 - 12), strength (0.003, 0.1, 1.0 3.0 mol/dm3) cesium (10&#454, 10&#455, 10&#456 10&#457 mol/dm3). Based on experimental Kd values, found be most influential factor, whereas effects Cs weathering condition were negligible. recalculated values suggest that existing surface complexation model is applicable explain sorption coefficients through wide solution conditions.