Research Article
Effective Factor Analysis for Chromium(VI) Removal from Aqueous Solutions and Its Application to Tunçbilek Lignite Using Design of Experiments
Table 3
Experimental runs and their results and predicted values from the regression analysis.
| | Run no. (actual) | Active carbon type (A) | Temperature (K) (B) | ppm (mg/L) (C) | pH (D) | qe (mg/g AC) | Predicted qe (mg/g AC) |
| | 1 (1) | PAC | 298.0 | 25.0 | 2 | 0.840 | 0.712 | | 2 (3) | PAC | 323.0 | 25.0 | 2 | 0.884 | 0.805 | | 3 (5) | PAC | 298.0 | 1200.0 | 2 | 20.593 | 18.957 | | 4 (7) | PAC | 323.0 | 1200.0 | 2 | 22.964 | 22.167 | | 5 (9) | PAC | 298.0 | 25.0 | 6 | 0.549 | 0.496 | | 6 (11) | PAC | 323.0 | 25.0 | 6 | 0.732 | 0.589 | | 7 (13) | PAC | 298.0 | 1200.0 | 6 | 10.917 | 10.608 | | 8 (15) | PAC | 323.0 | 1200.0 | 6 | 12.771 | 13.818 | | 9 (17) | PAC | 310.5 | 612.5 | 4 | 8.370 | 8.519 | | 10 (2) | CAC | 298.0 | 25.0 | 2 | 0.724 | 0.712 | | 11 (4) | CAC | 323.0 | 25.0 | 2 | 0.737 | 0.805 | | 12 (6) | CAC | 298.0 | 1200.0 | 2 | 16.780 | 18.957 | | 13 (8) | CAC | 323.0 | 1200.0 | 2 | 22.062 | 22.167 | | 14 (10) | CAC | 298.0 | 25.0 | 6 | 0.454 | 0.496 | | 15 (12) | CAC | 323.0 | 25.0 | 6 | 0.588 | 0.589 | | 16 (14) | CAC | 298.0 | 1200.0 | 6 | 10.992 | 10.608 | | 17 (16) | CAC | 323.0 | 1200.0 | 6 | 14.324 | 13.818 | | 18 (18) | CAC | 310.5 | 612.5 | 4 | 8.060 | 8.519 |
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