Effect of Sodium Benzenesulfonate on SO₄²⁻ Removal from Water by Polypyrrole-Modified Activated Carbon

Figure 9

Fourier-transform infrared spectra of (a) granular activated carbon (GAC), (b) pyrrole-FeCl₃·(6H₂O)-sodium benzenesulfonate (PFB)-GAC, and (c) PFB-GAC with SO₄²⁻ adsorbed.