Adsorption of Cd (II), Cu (II), and Zn (II) from Aqueous Solution onto Nitrogen-Functionalized Desmostachya bipinnata

Table 2

Sorption kinetics of pseudo second order for metal ions.

Metal ions	𝑞𝑒 (mg/g)	𝑅^2	𝐾2 (g/mg/min)
Cd (II)	25.68	0.999	2.81 × 10^− 3
Cu (II)	33.84	0.998	0.80 × 10^− 3
Zn (II)	39.03	0.997	1.59 × 10^− 3