Fig. 4. (A) Cs+ isotherm sorption data for KMS-1 (at pH ∼ 7). The solid line represents the fitting of the data with the Langmuir model. (B) Kinetic data for the sorption of Cs+ (initial concentration ∼ 1 ppm) by KMS-1. (C) Maximum Cs+ sorption capacity of KMS-1 found for different pH values. The dashed line represents the maximum theoretical exchange capacity for KMS-1. (D) PXRD patterns for Cs+-exchanged products isolated from highly acidic and alkaline solutions.
