In this study the sorption of cesium was investigated on four different minerals; quartz, plagioclase, potassium feldspar and biotite as well as granodiorite obtained from the Grimsel test site in Switzerland. The experiments were conducted in the presence of the weakly saline Grimsel groundwater simulant by determining the distribution coefficients using batch sorption experiments and PHREEQC-modelling across a large concentration range. In addition, the purity of the minerals was measured by XRD and the specific surface areas by BET method using krypton. The distribution coefficients of cesium were largest on biotite (0.304 +/- 0.005 m(3)/kg in 10(-8) M). Furthermore, the sorption of cesium on quartz was found to be negligibly small in all investigated concentrations and the sorption of cesium on potassium feldspar and plagioclase showed similar behavior against a concentration isotherm with distribution coefficients of 0.0368 +/- 0.0004 m(3)/kg and 0.18 +/- 0.04 m(3)/kg in 10(-8) M. Finally, cesium sorption behavior on crushed granodiorite followed the trend of one of its most abundant mineral, plagioclase with distribution coefficient values of 0.107 +/- 0.003m(3)/kg in 10-8 M. At low concentrations ( 1.0 . 10(-6) M. Secondly cesium sorption on potassium feldspar and plagioclase showed similar non-linear behavior with varying concentration. The results were used to assist the interpretation of cesium diffusion process in the 2.5 year in-situ experiment carried out in the underground laboratory at Grimsel test site in Switzerland (2007-2009).

中文翻译：

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Grimsel花岗闪长岩中Cs的行为：对主要矿物和碎石的吸附

在这项研究中，铯对四种不同矿物的吸附进行了研究；石英、斜长石、钾长石和黑云母以及从瑞士格里姆塞尔试验场获得的花岗闪长岩。通过使用批量吸附实验和 PHREEQC 建模在大浓度范围内确定分配系数，在弱盐分 Grimsel 地下水模拟物存在下进行实验。此外，矿物的纯度通过XRD测量，比表面积通过BET方法使用氪测量。铯的分配系数在黑云母上最大（0.304 +/- 0.005 m(3)/kg in 10(-8) M）。此外，