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

Figure 2

SEM images of (a) perlite (P), (b) perlite/α-MnO₂ composite (PAM), and (c) perlite/γ-Fe₂O₃ composite (PGI).

(a)

(b)

(c)