Fig. 9From: Biosorption of Congo Red from aqueous solution by crab shell residue: a comprehensive study a Scanning electron microscope images of CSP adsorption at a magnification of ×600, ×2.5k and ×10k. b Scanning electron microscope images of CSP after adsorption at a magnification of ×600, ×2.5k and ×10kBack to article page