Table 3 Comparison of the PFO and PSO rate constants and calculated parameters for different initial AY36 dye concentrations.
From: Adsorption of Acid Yellow 36 and direct blue 86 dyes to Delonix regia biochar-sulphur
Parameter | PFOM | PSOM | |||||||
|---|---|---|---|---|---|---|---|---|---|
DRB-S Dosage | AY36 (ppm) | qe (exp.) | qe (calc.) | k2 × 103 | R2 | qe (calc.) | k2 × 103 | h | R2 |
0.75 g L–1 | 50 | 64.27 | 7.45 | 22.11 | 0.923 | 64.94 | 6.83 | 28818.44 | 1.000 |
75 | 95.97 | 25.42 | 43.99 | 0.974 | 98.04 | 4.15 | 39840.64 | 1.000 | |
100 | 127.10 | 34.05 | 32.68 | 0.878 | 129.87 | 2.09 | 35211.27 | 1.000 | |
125 | 153.62 | 48.67 | 26.25 | 0.925 | 158.73 | 1.06 | 26737.97 | 0.999 | |
150 | 184.07 | 84.55 | 35.24 | 0.854 | 192.31 | 0.84 | 30959.75 | 0.999 | |
1.0 g L–1 | 50 | 48.78 | 4.56 | 16.81 | 0.958 | 49.26 | 9.56 | 23201.86 | 1.000 |
75 | 73.13 | 6.71 | 24.87 | 0.984 | 73.53 | 8.64 | 46728.97 | 1.000 | |
100 | 96.40 | 16.37 | 2.72 | 0.921 | 98.04 | 3.69 | 35460.99 | 1.000 | |
125 | 119.31 | 19.28 | 33.62 | 0.985 | 120.48 | 3.94 | 57142.86 | 1.000 | |
150 | 141.00 | 23.10 | 26.02 | 0.917 | 142.86 | 2.33 | 47619.05 | 1.000 | |
1.25 g L–1 | 50 | 39.25 | 3.27 | 15.66 | 0.936 | 39.53 | 12.93 | 20202.02 | 1.000 |
75 | 58.73 | 4.96 | 28.56 | 0.949 | 59.17 | 13.41 | 46948.36 | 1.000 | |
100 | 77.93 | 8.93 | 25.79 | 0.962 | 78.74 | 6.58 | 40816.33 | 1.000 | |
125 | 97.06 | 10.62 | 23.26 | 0.940 | 98.04 | 4.95 | 47619.05 | 1.000 | |
150 | 114.13 | 26.43 | 42.84 | 0.988 | 116.28 | 3.54 | 47846.89 | 1.000 | |
1.5 g L–1 | 50 | 32.76 | 2.32 | 15.43 | 0.933 | 32.89 | 18.41 | 19920.32 | 1.000 |
75 | 49.09 | 2.49 | 20.27 | 0.987 | 49.26 | 20.40 | 49504.95 | 1.000 | |
100 | 65.47 | 2.67 | 19.11 | 0.965 | 65.79 | 8.99 | 38910.51 | 1.000 | |
125 | 81.56 | 5.55 | 21.65 | 0.940 | 81.97 | 9.42 | 63291.14 | 1.000 | |
150 | 97.07 | 8.89 | 20.50 | 0.889 | 98.04 | 5.45 | 52356.02 | 1.000 | |
1.75 g L–1 | 50 | 28.20 | 1.51 | 13.36 | 0.819 | 28.33 | 27.33 | 21929.82 | 1.000 |
75 | 42.16 | 1.43 | 7.60 | 0.580 | 42.19 | 23.02 | 40983.61 | 1.000 | |
100 | 56.11 | 2.96 | 18.88 | 0.942 | 56.50 | 16.32 | 52083.33 | 1.000 | |
125 | 70.11 | 4.61 | 23.03 | 0.949 | 70.42 | 11.93 | 59171.60 | 1.000 | |
150 | 83.95 | 6.80 | 20.73 | 0.845 | 84.75 | 7.25 | 52083.33 | 1.000 | |
