Generation-3 Polyamidoamine Dendrimer-Silica Composite: Preparation and Cd(II) Removal Capacity

Table 2

Kinetic model parameters for Cd(II) adsorption.

Kinetic model	Parameter	Cd(II)
PFO	qe (mg·g^−1)	37.21
	k1 (min^−1)	0.083
	r^2	0.637
PSO	qe (mg·g^−1)	32.546
	k2 (g mg^−1·min^−1)	0.8182
	r^2	0.9912
IPD	C (mg·g^−1)	19.64
	ki (g g^−1·min^1/2)	1.524
	r^2	0.7621
PPA from IPD	%	41.75
PSA from IPD	%	58.25
Experimental qe	mg/g	75.0

PFO: pseudo-first-order model; PSO: pseudo-second-order model; IPD: intraparticle diffusion model; PPA: predicted pore adsorption from IPD; PSA: predicted surface adsorption from IPD.