Comparison of Acid Red 114 Dye Adsorption by Fe₃O₄ and Fe₃O₄ Impregnated Rice Husk Ash

Table 3

pH variations after adsorption onto MNP and RHA-MNP (without pH correction).

Initial dye concentration (mg/L)	pH after adsorption with MNP ( min)	pH after adsorption with RHA-MNP ( min)
20	4.37	3.41
40	4.38	3.42
60	4.47	3.48
80	4.48	3.49
100	4.49	3.52