Removal of Azo Dyes (Violet B and Violet 5R) from Aqueous Solution Using New Activated Carbon Developed from Orange Peel

Table 2

Langmuir and Freundlich isotherm parameters for violet B and violet 5R adsorption onto COP.

Sample	Freundlich			Langmuir
	𝐾𝐹	𝑛	𝑅^2	𝑞max (mg g^−1)	𝐾𝐿 (L mg^−1)	𝑅^2
Violet B
50 mg L^−1	4.366	0.86	0.935	38.6	33.65	0.980
100 mg L^−1	4.47	0.91	0.862	42.5	35.32	0.975
150 mg L^−1	4.83	0.94	0.944	44.2	36.7	0.986
Violet 5R
50 mg L^−1	5.26	0.78	0.940	36.45	42.0	0.992
100 mg L^−1	5.34	0.82	0.880	36.96	43.4	0.995
150 mg L^−1	5.41	0.86	0.924	37.26	44.2	0.996