Fe (a)
Current density(mA/cm
2
)
-
5
10
15
20
-
COD (%)
-
67.5
90.5
85.1
83.3
-
pH
1.8
4.5
7.2
8
10
-
COD (%)
90.2
83.4
90.5
77.9
63.2
-
Electrolyte
KCl
CaCl
2
NaCl
Na
2
CO
3
Na
3
PO
4
NaF
COD (%)
84.2
68.2
90.5
58
84.6
77.5
[NaCl] (g/L)
0.05
0.15
0.25
0.35
0.45
-
COD (%)
67.6
88.8
90.5
64.5
61.6
-
[Dye] (mg/L)
20
50
100
200
300
-
COD (%)
88.4
82.8
90.5
70.5
56.4
-
Inter electrode distance (cm)
0.4
0.6
0.8
1
1.5
2
COD (%)
75.6
72.2
90.5
72.3
60.3
48.3
Temperature (°C)
5
10
20
30
40
50
COD (%)
67.1
74.4
90.5
66.6
76.7
68.4
Al (b)
Current density (mA/cm
2
)
-
5
10
15
20
-
COD (%)
-
60.5
83.8
78
76.2
-
pH
1.8
4.5
7.2
8
10
-
COD (%)
82.2
77.4
83.8
70.9
56.4
-
Electrolyte
KCl
CaCl2
NaCl
Na2CO3
Na3PO4
NaF
COD (%)
77.4
61.2
83.8
50
75.8
77.5
[NaCl] (g/L)
0.05
0.15
0.25
0.35
0.45
-
COD (%)
59.6
82.8
83.8
58
54.8
-
[Dye] (mg/L)
20
50
100
200
300
-
COD (%)
80.6
75.8
83.8
64.5
48.3
-
Inter electrode distance (cm)
0.4
0.6
0.8
1
1.5
2
COD (%)
67.7
65
83.8
66.1
53.2
48.3
Temperature (°C)
5
10
20
30
40
50
COD (%)
58.5
67.7
83.8
59.6
70.9
61.2
Table 2:
Effect of current density, pH, Type of electrolyte, Concentration electrolyte, dye concentration, inter electrode distance and temperature on the efficiency of COD removal for reactive red 24 dye using Fe (a) and Al (b) electrodes
