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

Table 3

Kinetics parameters for the removal of violet B and violet 5R by COP (50 mL of 100 mg L⁻¹ of violet B and violet 5R and 0.4 g of COP at room temperature).

Sample	First order		Second order
	𝑅^2	𝑘1 ( s^−1)	𝑅^2	𝑘2 (g mg^−1 min^−1)
VB	0.950	1.9×10^−5	0.994	6.6×10^−5
V5R	0.966	3.2×10^−5	0.996	1.965×10^−4