Removal of Indigo Carmine Dye from Aqueous Solution Using Magnesium Hydroxide as an Adsorbent

Table 1

Infrared spectral data of magnesium hydroxide precursor aged at different pH values.

Peak number	Magnesium hydroxide aged at pH 6-7	Band assignment	Magnesium hydroxide aged at pH 13	Band assignment
	Wave number (cm^−1)
1	3698	OH stretch of Mg(OH)2	3697	OH stretch of Mg(OH)2
2	3646	OH stretch of Mg(OH)2	3647	OH stretch of Mg(OH)2
3	3444	OH stretch of Mg(OH)2	3445	OH stretch of Mg(OH)2
4	1634	H2O bend	1645	H2O bend