Abstract
The adsorption behavior of Cs+ onto granite was investigated. The distribution coefficient (Kd) of Cs+ onto granite was determined in the solution of which pH was ranged from 2.3 to 10.9 and ionic strength was set at 10-2 and 10-1. It is found that the Kd values for granite were larger than those for quartz, and the Kd values were found to increase with increasing pH and with decreasing ionic strength. The obtained data were successfully analyzed by an electrical double layer model and the optimum parameter values of the double layer electrostatics and adsorption reactions were obtained. The selective adsorption behavior of Cs+ onto the mineral components was discussed, and Cs+ were considered to be mainly adsorbed onto feldspars in the granite.
