Figure 1.
Characterization of acid- and alkali-treated EM. SEM images of EM treated for 72 hours with aqueous solutions of different pH values: (A) pH = 3; (B) DDH2O; and (C) pH = 11 (n = 3).
Characterization of acid- and alkali-treated EM. SEM images of EM treated for 72 hours with aqueous solutions of different pH values: (A) pH = 3; (B) DDH2O; and (C) pH = 11 (n = 3).