Table 1.
Effect of pH on adsorption capacity for C.I. Natural Red 4 onto marine sponge.
| pH | Dye concentration (mg/L) | ||
|---|---|---|---|
| 25 | 50 | 75 | |
| Experimental qt (mg/g) | |||
| 3 | 2.45 | 5.00 | 7.50 |
| 5 | 1.50 | 3.62 | 6.71 |
| 7 | 1.42 | 3.42 | 5.99 |
| 9 | 0.00 | 0.00 | 0.00 |
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