Adsorption of Selected Pharmaceutical Compounds onto Activated Carbon in Dilute Aqueous Solutions Exemplified by Acetaminophen, Diclofenac, and Sulfamethoxazole

Table 4

Comparison of Langmuir isotherm of acetaminophen, diclofenac, and sulfamethoxazole onto various adsorbents.

Adsorbent	Acetaminophen		Diclofenac		Sulfamethoxazole
	(mmol/g)	(L/mmol)	(mmol/g)	(L/mmol)	(mmol/g)	(L/mmol)
Granular activated carbon	3.82 (this study); 1.10 to 1.58 [33]; 1.32 to 1.77 [17]	26.28 (this study); 63.3 to 97.8 [33]; 16.3 to 54.4 [17]	1.30 (this study)	794.85 (this study)	1.80 (this study)	167.17 (this study)
Powdered activated carbon	n.a.	n.a.	n.a.	n.a.	0.73 [23]; 0.26 to 0.43 [24]	185 [23]; 0.65 to 1.56 [24]
Chitosan	n.a.	n.a.	0.53 [34]	25.7 [34]	n.a.	n.a.
Aptamer-based column	n.a.	n.a.	0.09 [26]	0.0001 to 0.0002 [26]	n.a.	n.a.
Organo-zeolite	n.a.	n.a.	0.13 [20]	42.7 [20]	0.71 to 1.90 [25]	35 to 286 [25]

n.a.: not available.