Figure 5
From: Advanced Modified Polyacrylonitrile Membrane with Enhanced Adsorption Property for Heavy Metal Ions

(a,d) SEM images of pure PAN membrane and PAN-(DR-EDTA)3 membrane, showing an internal construction of PAN membrane. (b), (c) and (e,f) AFM images of pure PAN membrane and PAN-(DR-EDTA)3 membrane, showing a surface shapes of PAN membrane.