Strontium dissolution effect on the adsorption experiment with rhyolitic pumice tuff

• DOI: 10.2343/geochemj.2.0383
• Publication Date: 2015-09-29T22:04:05Z
• Authors: M. Rajib; C. T. Oguchi; T. Sasaki; T. Kobayashi
• Keywords: Pumice; Dilution; Nuclide; Human decontamination

Determination of adsorption coefficient strontium (Sr), one the major elements low and intermediate level radioactive wastes, is an important step to assess performance a waste repository. The on rhyolitic type pumice tuff, already selected as potential host rock for repositories in Japan, was investigated with batch experiments. Some parts tuff were oxidized this redox effect compared fresh tuff. distribution yielded negative values ranging from –0.3 –9.6 mL/g at initial concentration 10–6 10–7 mol/dm3, because higher over found aqueous phase equilibrium. Batch dissolution experiment revealed that releases considerable amount strontium, 8.27 × 4.76 respectively Incorporating dissolved equilibrium, changes Considering thus necessary, especially zone solid, properly evaluate easily soluble nuclides when lower used. To incorporate effect, slight modification existing equation made determine coefficient.