Table 2. Kinetic Parameters for Adsorption of MB and CV on MS, OMS-1, and OMS-2 (V = 50 mL, Adsorbent Mass = 0.05 g, T = 25 °C).
pseudo-first-order |
pseudo-second-order |
intra-particle diffusion |
|||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
dyes | adsorbents | qe (mg g–1) | k1 (×10–2) (min–1) | R2 | qe (mg g–1) | k2 (×10–2) (g (mg min)−1) | R2 | kid | C (102) | R2 | SSE |
MB | MS | 27.03 | 2.94 | 0.7634 | 190.48 | 0.69 | 0.9999 | 5.2 | 1.45 | 0.9799 | 40.36 |
OMS-1 | 29.17 | 2.82 | 0.7611 | 125.16 | 0.60 | 0.9996 | 25.85 | 0.38 | 0.9423 | 15.71 | |
OMS-2 | 47.80 | 3.30 | 0.9397 | 141.64 | 0.32 | 0.9997 | 22.55 | 0.45 | 0.9147 | 17.95 | |
CV | MS | 16.57 | 2.28 | 0.8434 | 99.90 | 1.03 | 0.9997 | 0.49 | 0.92 | 0.9756 | 1.36 |
OMS-1 | 31.90 | 2.47 | 0.6539 | 247.52 | 0.66 | 0.9999 | 4.78 | 2.19 | 0.9871 | 0.40 | |
OMS-2 | 35.11 | 2.88 | 0.6458 | 272.48 | 0.59 | 0.9999 | 8.25 | 2.24 | 0.9788 | 1.03 |