Fig. 3
From: Effect of pH on the surface charges of permanently/variably charged soils and clay minerals

The reduction rates of the SCNs of montmorillonite, illite, and kaolinite when the pH decreases from approximately 11 to 3.
From: Effect of pH on the surface charges of permanently/variably charged soils and clay minerals

The reduction rates of the SCNs of montmorillonite, illite, and kaolinite when the pH decreases from approximately 11 to 3.