Adsorption Kinetics for the Removal of Hazardous Dye Congo Red by Biowaste Materials as Adsorbents
Figure 2
Scanning electron microscope (SEM) images of ground nut shell (GNC) (a) before adsorption, (b) after adsorption; Eichhornia charcoal (EC), (c) before adsorption, (d) after adsorption.
