Alternative Composite Nanosorbents Based on Turkish Perlite for the Removal of Cr(VI) from Aqueous Solution

Figure 1

FT-IR spectrum of (a) perlite (P) (blue), (b) perlite/α-MnO₂ composite (PAM) (pink), and (c) perlite/γ-Fe₂O₃ composite (PGI) (red).