Synergistic Removal of Humic Acid in Water by Coupling Adsorption and Photocatalytic Degradation Using TiO2/Coconut Shell Powder Composite
Table 2
Summary of apparent first-order degradation rate constant () of HA under various conditions.
Run
(mg/L)
Loading amount of TCNSP (g/L)
pH
Type of lamp
(min−1)
Effect of initial concentration
1
10
20
9
UVC
0.1091
2
20
20
9
UVC
0.0749
3
30
20
9
UVC
0.0588
4
40
20
9
UVC
0.0505
5
50
20
9
UVC
0.0413
Effect of loading amount for TCNSP
6
30
2
9
UVC
0.0173
7
30
10
9
UVC
0.0327
8
30
20
9
UVC
0.0588
9
30
40
9
UVC
0.0539
10
30
60
9
UVC
0.0593
Effect of irradiation source
11
30
20
9
UVC
0.0588
12
30
20
9
UVA
0.0219
13
30
0
9
UVC
0.0034
14
30
0
9
UVA
0.0015
Effect of pH
15
30
20
3
UVC
0.1043
16
30
20
5
UVC
0.0961
17
30
20
7
UVC
0.0588
18
30
20
9
UVC
0.0447
19
30
20
11
UVC
0.0341
Initial concentration of HA. pH was adjusted as a constant with minimal errors (±0.2) throughout the whole experiments. Apparent or lumped first-order degradation rate constant. Ultraviolet C (254 nm). Ultraviolet A (365 nm).
