Biosorption of Ni(II), Cr(III), and Co(II) from Solutions Using Acalypha hispida Leaf: Kinetics, Equilibrium, and Thermodynamics

Table 2

Parameters of the pseudo-second-order kinetic model for the biosorption of Ni(II), Cr(III), and Co(II) using Acalypha hispida leaf.

Metal ion	𝑘2 (g·mg^−1·min^−1)	𝑞𝑒 (mg·g^−1)	𝑅^2	S.D.
Ni(II)	8.395× 10^−3	62.383	0.998	0.06133
Cr(III)	1.224× 10^−4	107.296	0.963	0.12277
Co(II)	1.064× 10^−3	60.096	0.977	0.11231