Table 1. Absorbent–Adsorbate Systems under Investigation along with the Langmuir Equilibrium Parameters.

designation	adsorption system	W × 104 (kg)	V × 104 (m3)	CA,0 (kg/m3)	T (K)	q∞ (q∞)	K (m3/kg) (K)	source
system 1a	aGAC-MV	0.8	0.5	0.001	298.15	0.095 (0.093)	380.76 (378.5)	(19)
system 1b				0.002
system 1c				0.003
system 2a	aCA-B_AC composite beads-MB	2	2	0.20	303.15	0.756 (0.755)	21.5 (21.0)	(41)
system 2b				0.30
system 2c				0.50
system 3a	Durian shell-MB	6	1	0.20	303.15	0.289 (0.283)	19.7 (21.2)	(42)
system 3b				0.25
system 3c				0.30
system 4a	Cadmium II-C. vulgaris	0.75	1	0.10	303.15	0.091 (0.089)	22 (21.4)	(43)
system 4b					313.15	0.083 (0.085)	15 (14.1)
system 4c					323.15	0.077 (0.077)	9.5 (9.3)

^aAbbreviations: GAC, granular activated carbon; MV, methyl violet; CA_B_AC, calcium alginate–bentonite–activated carbon; MB, methylene blue. In parentheses are the values re-estimated in the present work.