Table 1: Physicochemical characteristics of the native rice straw and their modified rice straw adsorbents.

CharacteristicsRSARSARS-0.5C-EARS-1C-EARS-0.5CARS-1CARS-E

Slurry pH4.656.507.867.925.215.557.85
pHZPC4.686.337.097.294.224.527.75
Bulk density (g/cm3)0.39890.36050.29490.34400.38610.37130.2601
Moisture, %1.0080.18340.02020.00640.00820.01310.0252
Methylene blue number (mg/g)28.955.272.061.080.0116.0102.0
Iodine number (mg/g)56.8243.8284.8308.4244.9311.3261.9