Modified Cenospheres as an Adsorbent for the Removal of Disperse Dyes

Table 2

Comparison of pseudo-first-order and pseudo-second-order kinetics at different concentrations of DO and DB dyes.

Dyes	Pseudo-first-order kinetics						Pseudo-second-order kinetics
Conc.	DO			DB			DO			DB
(mg/L)
10	1.03	0.04	0.91	2.70	0.03	0.93	4.74	0.03	0.99	2.36	0.05	0.99
20	0.09	0.04	0.98	1.99	0.02	0.97	8.69	0.03	0.99	5.38	0.06	0.99
30	0.07	0.03	0.98	1.98	0.02	0.97	12.82	0.02	0.99	8.07	0.04	0.99
40	0.37	0.03	0.99	0.66	0.03	0.98	16.67	0.02	0.99	10.87	0.03	0.99
50	0.56	0.03	0.96	1.69	0.03	0.97	20.00	0.02	0.99	11.91	0.05	0.99
60	0.30	0.04	0.92	1.11	0.03	0.87	22.73	0.02	0.99	13.33	0.04	0.99
70	0.20	0.03	0.94	1.55	0.03	0.90	25.00	0.01	0.99	14.29	0.04	0.99
80	0.30	0.03	0.98	0.98	0.03	0.92	25.64	0.01	0.99	15.87	0.04	0.99
90	0.21	0.04	0.91	0.91	0.03	0.84	27.78	0.02	0.99	17.54	0.03	0.99
100	0.34	0.03	0.97	1.01	0.03	0.95	29.41	0.02	0.99	19.52	0.03	0.99

and are rate constants of pseudo-first-order and pseudo-second-order kinetics.