Research Article

Insight into Equilibrium and Kinetics of the Binding of Cadmium Ions on Radiation-Modified Straw from Oryza sativa

Table 1

Kinetics of the biosorption of Cd(II) onto UMRS.

ModelLinear equation (mg g−1)Model parameters

Elovich model 2.924 (mg g−1 min−1) 
(g mg−1) 

25.64
0.6931
First order (min−1)
(mg g−1)
0.0452
2.914
0.5245
Pseudo-first order (min−1)
(mg g−1)
0.1074
0.1537
0.4734
Second order (g mg−1 min−1)
0.0026
0.4644
Pseudo-second order (g mg−1 min−1)
(mg g−1)
4.6812
2.929
0.999
Intraparticle diffusion (mg g−1 min−1/2)

0.0245
2.7902
0.6166