Determination of sorption and diffusion parameters of Se(IV) on crushed granite

作者：Jan By Yi Lin; Tsai Shih Chin^*; Li Yu Yun

来源：Journal of Radioanalytical and Nuclear Chemistry, 2014, 301(2): 365-371.

DOI：10.1007/s10967-014-3177-z

• Selenium
• Granite
• Sorption
• Column test
• Diffusion coefficient
• Retardation factor

Sorption and diffusion are important processes for the transport of radionuclides through geomedia from a radioactive disposal facility. In this study, batch tests and through-diffusion experiments were performed to investigate the sorption and diffusion of Se(IV) in crushed granite. Different column lengths of 2, 4 and 8, were employed in the through-diffusion experiments to study the effect of the column length on the apparent diffusion coefficients. Synthetic groundwater (GW) and synthetic seawater (SW) were the liquid phases in these experiments. A two-site kinetic linear model and the Freundlich isotherm were applied to match the sorption/desorption batch data quite closely for both of GW and SW conditions. The retardation factors (R-f) were estimated by comparing the breakthrough curve of Se(IV) with that of HTO. Experimental results indicated that whether in GM or SW solution, the column lengths did not significantly affected D-a or R-f of Se in crushed granite.

• 出版日期2014-8