Study on sorption and diffusion of Sr in crushed and intact basalt and granite investigated in through-diffusion experiments
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This study investigates sorption and diffusion of strontium (Sr) in two potential host rocks (granite from Kingman Island and basalt from Penghu Island) by using batch and column methods. According to solid-phase analysis, the sorption component primarily contained iron–magnesium (Fe–Mg) minerals in basalt and granite. Moreover, the distribution coefficient (K d) of Sr in various concentrations obtained from batch tests indicated a higher sorption capacity in basalt than that in granite because of the 10 % Fe–Mg mineral content. According to the diffusive results in crushed and intact rocks, it showed that major retardation of Sr depended on the micro-porous structure of tested media, such as decreases of constrictivity and increases of tortuosity.
KeywordsSorption Diffusion Granite Basalt Distribution coefficient (Kd)
This work was mainly supported by the Ministry of Education, Taiwan, R.O.C. under the NCKU Aim for the Top University Project, Promoting Academic Excellence & Developing World Class Research Centers. The experimental section of this study was supported by National Science Council (NSC, Taiwan) under the contract number of 103-2914-I-006-008-A1 and Institute of Nuclear Energy Research (INER, Taiwan) through 2013 NSC/AEC mutual fund project (NSC103-NU-E-006-001-NU).
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