Photocatalytic Processes for the Removal of Dye - Green Chemistry for Dyes Removal from Wastewater - page 149

Table 5.2 Comparison of the adsorption capacities of the rice husk-based materials.

Modiication Surface Area

( m 2 g -1 )

Dye Type pH Adsorption

Capacity
(mg.g -1 )

Ref.

N/A … Methylene Blue 7 40 [120]

N/A … Direct Red-31 3 130 [44]

Direct Orange-26 66.7

N/A … Direct Red-31 2 20.5 [121]

NaOH 116 Malachite Green 7 10 [45]

Crystal Violet 8 45 [46]

NaOH 0.47 Methylene Blue 5.2 8.3 [122]

H 3 PO 4 352 Acid Blue … 38 [47]

H 3 PO 4 … Malachite Green … 92.6 [48]

Carbonization - NaOH - Activation 1015 Methylene Blue 12 396.4 [35]

NaOH - H 2 SO 4 - Carbonization - Activation 2028 Methylene Blue 10 552 [123]

Carbonization … Malachite Green 5 146.5 [52]

Carbonization - NaOH - Activation 1886 Rhodamine B 3.5 480 [50]

Malachite Green 6.6 547 [49]