In this study, the adsorption of cesium (Cs) on biotite and dissolution of Cs from Cs-bearing biotite using a siderophore were investigated aiming to contribute to the elucidation of radiocesium migration mechanisms in the soil environment. Thus, a siderophore was extracted and purified from the culture medium of Pseudomonas sp., and the purified siderophore was used in five consecutive dissolution experiments of biotite samples. Prior to the dissolution experiments, Cs was adsorbed on a hardly weathered biotite powder sample. The major components of the biotite (Al, Fe, and Mg) were dissolved almost stoichiometrically, strongly suggesting that the siderophore selectively dissolves the broken edges of the biotite. The amount of the dissolved Cs decreased by increasing the repetition times of the dissolution experiment. Therefore, the Cs adsorbed on the broken edges was dissolved rapidly as the siderophore dissolved the broken edges, and then, the Cs adsorbed on the outer planar surface of the biotite particles was slowly dissolved because the siderophore did not directly dissolve the outer planar surface of the biotite but dissolved the surface edge.

在这项研究中，研究了使用铁载体对铯在黑云母上的吸附和从含Cs黑云母中溶解Cs的目的，旨在阐明土壤环境中放射性铯的迁移机理。因此，从假单胞菌的培养基中提取并纯化了铁载体。，然后将纯化的铁载体用于黑云母样品的五个连续溶解实验中。在溶解实验之前，Cs吸附在难风化的黑云母粉末样品上。黑云母的主要成分（Al，Fe和Mg）几乎化学计量地溶解，这强烈表明铁载体选择性地溶解了黑云母的破碎边缘。通过增加溶解实验的重复次数，溶解的Cs量减少。因此，当铁载体溶解断裂边缘时，吸附在断裂边缘上的Cs迅速溶解，然后，由于铁载体不能直接溶解黑云母颗粒的外平面上，因此吸附在黑云母颗粒的外平面上的Cs被缓慢溶解。黑云母，但溶解了表面边缘。