Activated and Nonactivated Date Pits Adsorbents for the Removal of Copper(II) and Cadmium(II) from Aqueous Solutions

Table 3

The kinetics constants for the adsorption of Cu(II) onto RDP and ADP, (initial concentration of Cu(II) = 50 mg/L).

Adsorbents	Pseudo-first-order kinetics		Pseudo-second-order kinetics
	𝑘1, min^−1	𝑅^2	𝑘2, gm (mg min)^−1	𝑅^2
RDP	4.86 × 10^−3	0.923	0.097	0.998
ADP	0.017	0.778	0.131	0.999