α and γ Alumina Spheres for Azo Dye (Allura Red) Removal from Aqueous Media

Table 4

Comparison of R40 removal by different adsorbent materials.

Adsorbent material	Sorption capacity (mg/g)	Reference
Zirconia fibers	0.8950	Ávila-Martínez et al. [34]
Activated charcoal (walnut shells)	9.9865	Herrera-García, Aguirre-Ramírez, and Torres-Pérez [35]
Basic anion-exchanger (Lewatit MonoPlus M-600)	3.4120	Wawrzkiewicz and Hubicki [36, 37]
Amberlite IRA-900	9.9950	Wawrzkiewicz and Hubicki [36, 37]
Amberlite IRA-910	10.095	Wawrzkiewicz and Hubicki [36, 37]
Modified organoclay - C3H1	29.400	Ullah et al. [38]
Modified organoclay - C2CB1	25.300	Ullah et al. [38]
Modified organoclay - C2S1	20.300	Ullah et al. [38]
Commercial 4A zeolite (4AZ)	0.4627	Erdoğan [39]
α-Alu spheres ( =10 mg/L)	0.1765	This work
γ-Alu spheres ( =10 mg/L)	8.1979	This work
γ-Alu spheres ( = 50 mg/L)	13.5980	This work
γ-Alu spheres ( =100 mg/L)	18.9865	This work
γ-Alu spheres (pH =3.0)	9.4961	This work
γ-Alu spheres (pH =5.0)	8.4515	This work
γ-Alu spheres (pH =10.0)	5.3752	This work