Kinetic Study of the Bioadsorption of Methylene Blue on the Surface of the Biomass Obtained from the Algae D. antarctica

Table 2

Adsorption kinetic parameters obtained by adsorption of MB onto D. antarctica.

Kinetic model	Parameter	Initial concentration of MB (mg/L)
	r	25	50	100	150	200
Pseudo-first-order	K1	0.00967	0.00783	0.00967	0.00921	0.00990
	R^2	0.986	0.952	0.893	0.937	0.992
Pseudo-second-order	K2	0.00178	0.000287	0.000385	0.000234	0.0000730
	qe, exp.	22.565	41.221	87.754	141.763	191.294
	qe, cal.	22.402	40.003	86.024	140.955	196.349
	R^2	0.999	0.972	0.995	0.999	0.994
Modified pseudo-first-order	Km	0.008	0.0059	0.0081	0.0074	0.0078
	R^2	0.985	0.875	0.839	0.971	0.991
Elovich	α	3.908	1.634	15.783	11.672	7.450
	β	0.272	0.122	0.0733	0.0356	0.0224
	R^2	0.991	0.943	0.992	0.967	0.970
Intraparticle diffusion	ki	4.547	2.212	17.519	13.766	3.259
	R^2	0.963	0.996	0.949	0.914	0.897
Film diffusion	A	0.346	0.0591	0.212	0.416	0.0664
	kf	0.0097	0.0078	0.0096	0.0092	0.01
	R^2	0.986	0.952	0.893	0.937	0.992