Figure 7
From: Characteristics of Cadmium Sorption by Heat-Activated Red Mud in Aqueous Solution

Contour plot showing the impact on Cd(II) sorption by the process variable pair of pH and contact time with Cd(II) concentration at 102 mg∙L−1. The numerical labels on the contour lines indicate the amount of Cd(II) sorption (mg∙g−1).