Surface Modification Effects on CNTs Adsorption of Methylene Blue and Phenol

Table 15

Previously reported adsorption capacities of various adsorbents for MB.

Adsorbent	𝑄𝑚 (mmol/kg)	Reference
Pyrolyzed petrified sediment	7.47	Aroguz et al. [9]
Coir pith carbon	18.35	Kavitha and Namasivayam [10]
Salts-treated beech sawdust	30.33 ± 0.60–48.77 ± 2.40	Batzias and Sidiras [11]
Garlic peel	258.37–446.65	Hameed and Ahmad [12]
Activated desert plant	165.70	Bestani et al. [1]
Activated carbons	31.921–51.37	Karagöz et al. [13]
Wheat shells	51.77	Bulut and Aydin [14]
Spent coffee grounds	58.56	Franca et al. [15]
Acid treated-CNTs	110.68–202.28	Yao et al. [16]
As synthesized CNTs	82.01–103.70	This work
Acid-treated CNTs	80.07–99.83	This work
Heat-treated CNTs	83.76–182.71	This work