Table 7: FT-IR vibrations and their corresponding wavenumbers and region for the bands observed for the EC-by product.

Electrode materialType of vibrationsVibration wavenumbers ( )Vibration range ( )

IronOH stretching37383689–3787
34473550–3000
Hydroxyl bending16371572–1813
(OH) water bending16371572–1813
Overtones of hydroxyl bending16371572–1813
Magnetite ( or )575526–840
Fe-O469416–510
Lepidocrocite11201090–1245
1023923–1057
745730–90