Research Article
Effect of Sodium Benzenesulfonate on SO42− Removal from Water by Polypyrrole-Modified Activated Carbon
Figure 6
Scanning electron microscopy images of (A1) granular activated carbon, (B1) pyrrole-FeCl3·(6H2O)-granular activated carbon, and (C1) pyrrole-FeCl3·(6H2O)-sodium benzenesulfonate-granular activated carbon at a magnification of 2000 and of (A2) granular activated carbon, (B2) pyrrole-FeCl3·(6H2O)-granular activated carbon, and (C2) pyrrole-FeCl3·(6H2O)-sodium benzenesulfonate-granular activated carbon at a magnification of 7000.