O–H bending to a medium band between 1200 and 1500 cm−1
[24,25]. Therefore, this implies hydration in the FeAA. Furthermore,
it can be noted from Fig. 2 that the presence of -FeOOH
is confirmed by the appearance of peaks at 890 cm−1 [26] and
795 cm−1 [23]. Additionally, Fig. 3 depicts the morphology of
the original activated alumina grain support (Fig. 3a and b) and
FeAA (Fig. 3c and d). Compare Fig. 3a with Fig. 3c [20], and