Table 2.

Kinetic parameters for adsorption of Cr(VI) onto biomass of Aspergillus niger.

Adsorption isotherm	Parameters		R2
Pseudo-first-order	qe,exp, mg/g k1, min−1	1.156 20.255	0.878
Pseudo-second-order	k2, g/mg−1 min−1 qe,cal, mg/g	0.022 0.106	0.942
Intraparticle diffusion	Kd, mg/g·min1/2 I	4.119 298.36	0.306