Optimized Removal of Hydroquinone and Resorcinol by Activated Carbon Based on Shea Residue (Vitellaria paradoxa): Thermodynamics, Adsorption Mechanism, Nonlinear Kinetics, and Isotherms

Table 12

Comparison of CAK-S with other materials for HQ and R reduction.

Adsorbent	Condition	Adsorbed quantity	References
Adsorption of hydroquinone by some adsorbents
CAK-S	C = 158 mg/L; pH = 3; t = 120 min; m = 50 mg	45.02 mg/g	Present study
Activated carbon based on monkey kola (Cola lepidota K. Schum) waste	C = 55.55 mg/L; pH = 6; t = 30 min; m = 100 mg	7.33 mg/g (66.57 μmol/g)	[3]
Iron impregnated granular activated carbon	C = 100 mg/L, pH = 4, t = 14 h, m = 40 g/L	26.55 mg/g	[53]
Adsorption of resorcinol by some adsorbents
CAK-S	C = 180 mg/L; pH = 3; t = 86 min; m = 118 mg	33.65 mg/g	Present study
Activated carbon based on monkey kola (Cola lepidota K. Schum) waste	C = 55.55 mg/L; pH = 6; t = 30 min; m = 100 mg	0.60 mg/g (5.47 μmol/g)	[3]
OMC	C = 20 mg/L; pH = 6.5; t = 24 h; m = 0.1 g/L	34.4 mg/g	[54]