Removal Properties, Mechanisms, and Performance of Methyl Green from Aqueous Solution Using Raw and Purified Sejnane Clay Type

Table 2

FTIR spectra bands of raw (AB) and purified (AP) used clay.

Wavenumber (cm^−1)		Assignments	References
AB	AP
723	721	Si-O quartz	[39]
824	820	Fe-OH-Fe	[40]
915	915	Internal-surface OH bending	[41]
1006	1006	Si-O-Si symmetric stretch	[39, 42, 43]
1638	1638	H-O-H bending	[39, 43]
2029	2037	OH deformation of water	[39]
2202	2199	OH deformation of water	[39]
—	3408	Ferric hydroxyl	[39]
3620	—	Crystalline OH stretching	[39, 44, 45]
3670	3652	OH antisymmetric stretching (Al2OH)	[39, 42]
3714	3711	OH stretching	[41]