Statistical Modeling and Kinetic Studies on the Adsorption of Reactive Red 2 by a Low-Cost Adsorbent: Grape Waste-Based Activated Carbon Using Sulfuric Acid Activator-Assisted Thermal Activation

Table 4

The comparison of results of this study with previous works.

Removal (%)	Contact time (min)	Initial Co. RR2 (mg/L)	pH	Adsorbent (g/L)	Adsorbent	Reference
96.83	90	100	3	12.25	Grape waste	Present study
70>	30	20	3	0.2	Hazelnut shells	[50]
49.91	—	120	2	2	Soya bean meal	[54]
95>	25	220	2	0.3	Clay montmorillonite	[55]
98	100	60	2	0.05	Leucophloea wood sawdust	[42]
90>	40	—	2	1	Dried fungal	[51]

Maximum uptake capacity.