Indigo Carmine and 2,6-Dichlorophenolindophenol Removal Using Cetyltrimethylammonium Bromide-Modified Palm Oil Fiber: Adsorption Isotherms and Mass Transfer Kinetics

Figure 4

XRD curves of (a) raw POF, (b) NaOH-treated POF, and (c) CTAB-modified POF.