Research Article
Effectiveness of Alkali-Acid Treatment in Enhancement the Adsorption Capacity for Rice Straw: The Removal of Methylene Blue Dye
Table 1
Physicochemical characteristics of the native rice straw and their modified rice straw adsorbents.
| | Characteristics | RS | ARS | ARS-0.5C-E | ARS-1C-E | ARS-0.5C | ARS-1C | ARS-E |
| | Slurry pH | 4.65 | 6.50 | 7.86 | 7.92 | 5.21 | 5.55 | 7.85 | | pHZPC | 4.68 | 6.33 | 7.09 | 7.29 | 4.22 | 4.52 | 7.75 | | Bulk density (g/cm3) | 0.3989 | 0.3605 | 0.2949 | 0.3440 | 0.3861 | 0.3713 | 0.2601 | | Moisture, % | 1.008 | 0.1834 | 0.0202 | 0.0064 | 0.0082 | 0.0131 | 0.0252 | | Methylene blue number (mg/g) | 28.9 | 55.2 | 72.0 | 61.0 | 80.0 | 116.0 | 102.0 | | Iodine number (mg/g) | 56.8 | 243.8 | 284.8 | 308.4 | 244.9 | 311.3 | 261.9 |
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