A Green and Facile Approach for Synthesis of Starch-Pectin Magnetite Nanoparticles and Application by Removal of Methylene Blue from Textile Effluent

Table 4

Observed and assigned peaks with references indicated.

Observed peak (cm^-1)	Assignment	Reference
1737	C=O (characteristic peak of pectin esterified pendant group)	[14]
536	Fe-O bond vibration of Fe3O4	[17]
1404	-CH bending of CH2 groups	[18]
1594	Asymmetric v(C=O) vibration	[19]
2938	-CH stretching of CH2 group vibration	[18]
1325	-CH2 scissoring	[18]
1389; 1579-1594	Symmetric and asymmetric stretching of carboxylate-metal (-COO-Fe)	[14, 19]
1074-1142	v(C-O) of -CH-OH in aliphatic cyclic secondary alcohols	[18]
1641	v(C=O) stretching vibration peak	[18]
1010-1017	C-O-C glycosidic bond linking monosaccharaides in starch and galacturonic acid in pectin	[14]
1626 and 3150	Presence of hydroxyl groups on the surface of nanoparticles	[19]