Table 7 Pseudo-first-order and pseudo-second-order kinetics constants.
Activated carbon | Co (mg/L) | Qe,exp (mg/g) | Pseudo-first-order | Pseudo-second-order | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Qe (mg/g) | k1 (min−1) | SSE | R2 | Qe (mg/g) | k2 (g/mg min) | SSE | R2 | |||
Methylene blue | ||||||||||
TAC2 | 20 | 19.9 | 19.4 | 0.434 | 33.1 | 0.9193 | 19.9 | 0.039 | 13.1 | 0.9680 |
100 | 95.6 | 90.0 | 0.147 | 1,339 | 0.8639 | 93.3 | 0.003 | 431 | 0.9555 | |
TAC3 | 20 | 19.8 | 18.8 | 0.405 | 53.3 | 0.8693 | 19.4 | 0.032 | 23.7 | 0.9418 |
100 | 89.9 | 81.6 | 0.189 | 1607 | 0.8052 | 85.1 | 0.003 | 718 | 0.9128 | |
TAC4 | 20 | 15.6 | 14.1 | 0.209 | 29.2 | 0.8903 | 14.6 | 0.022 | 11.7 | 0.9558 |
TAC5 | 20 | 18.4 | 16.9 | 0.088 | 68.7 | 0.8695 | 17.66 | 0.009 | 21.1 | 0.9557 |
TAC6 | 20 | 19.8 | 18.2 | 0.150 | 65.2 | 0.8676 | 18.9 | 0.013 | 18.5 | 0.9614 |
Congo red | ||||||||||
TAC2 | 20 | 17.0 | 15.7 | 0.009 | 38.5 | 0.9528 | 17.7 | 0.0007 | 17.2 | 0.9728 |
TAC3 | 20 | 17.8 | 15.3 | 0.019 | 89.9 | 0.8460 | 16.9 | 0.0015 | 47.3 | 0.9070 |
TAC4 | 20 | 14.9 | 14.2 | 0.006 | 15.2 | 0.9808 | 16.5 | 0.0004 | 6.86 | 0.9887 |
TAC5 | 20 | 19.6 | 17.3 | 0.027 | 88.0 | 0.8628 | 18.9 | 0.002 | 39.0 | 0.9335 |
100 | 76.1 | 66.9 | 0.048 | 1,024 | 0.8637 | 71.7 | 0.001 | 380 | 0.9461 | |
TAC6 | 20 | 18.5 | 17.2 | 0.011 | 38.1 | 0.9613 | 19.3 | 0.0007 | 16.5 | 0.9787 |
100 | 66.8 | 59.5 | 0.016 | 705 | 0.9245 | 66.2 | 0.0003 | 276 | 0.9674 |