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Table 1

The optimal conditions of the electro-persulfate process on dye removal

ParameterAmountValues of other parametersDye removal efficiency (%) After 60 minEnergy consumption in 90% dye removal efficiencyOptimum amount
pH 3 [Na2S2O8] = 300 mg/L, [Dye] = 50 mg/L, [FeSO4] = 100 mg/L, I = 0.5 A, d = 3 cm 93.7 101 5 
5 94.4 101.2 
6 86.8 118 
7 70.8 132.4 
8.2 68.9 145.2 
9 75 126.9 
11 79 123.1 
Initial dye concentration (mg/L) 50 [Na2S2O8] = 300 mg/L, [FeSO4] = 100 mg/L, pH = 5, I = 0.5 A, d = 3 cm 94.5 100 200 
100 90 55.6 
150 88 37.2 
200 85 35.1 
250 75 31.3 
[Na2S2O8] (mg/L) 300 [FeSO4] = 100 mg/L, pH = 5, I = 0.5 A, [Dye] = 200 mg/L, d = 3 cm 85 35.2 500 
400 87.5 27.8 
500 95 19.2 
600 97 18.5 
[SO42−]/[Fe2+] 10 [FeSO4 = 100 mg/L, pH = 5, I = 0.5 A, [Dye] = 200 mg/L, d = 3 cm 86 28 5 
5 95 19 
3.33 93 21.4 
2.5 92 24.6 
Current (mA) 357 [Dye] = 200 mg/L, pH = 5, [Na2S2O8] = 500 mg/L, [FeSO4] = 100 mg/L, d = 3 cm 87 15.14 500 
417 88.5 18.75 
500 95 18.5 
625 93 29.8 
833 93.5 55.5 
Distance between electrodes (cm) 1 [Dye] = 200 mg/L,pH = 5, [Na2S2O8] = 500 mg/L, [FeSO4] = 100 mg/L, I = 0.5 A 92 15.7 2 
2 95.5 16 
3 95 23.2 
ParameterAmountValues of other parametersDye removal efficiency (%) After 60 minEnergy consumption in 90% dye removal efficiencyOptimum amount
pH 3 [Na2S2O8] = 300 mg/L, [Dye] = 50 mg/L, [FeSO4] = 100 mg/L, I = 0.5 A, d = 3 cm 93.7 101 5 
5 94.4 101.2 
6 86.8 118 
7 70.8 132.4 
8.2 68.9 145.2 
9 75 126.9 
11 79 123.1 
Initial dye concentration (mg/L) 50 [Na2S2O8] = 300 mg/L, [FeSO4] = 100 mg/L, pH = 5, I = 0.5 A, d = 3 cm 94.5 100 200 
100 90 55.6 
150 88 37.2 
200 85 35.1 
250 75 31.3 
[Na2S2O8] (mg/L) 300 [FeSO4] = 100 mg/L, pH = 5, I = 0.5 A, [Dye] = 200 mg/L, d = 3 cm 85 35.2 500 
400 87.5 27.8 
500 95 19.2 
600 97 18.5 
[SO42−]/[Fe2+] 10 [FeSO4 = 100 mg/L, pH = 5, I = 0.5 A, [Dye] = 200 mg/L, d = 3 cm 86 28 5 
5 95 19 
3.33 93 21.4 
2.5 92 24.6 
Current (mA) 357 [Dye] = 200 mg/L, pH = 5, [Na2S2O8] = 500 mg/L, [FeSO4] = 100 mg/L, d = 3 cm 87 15.14 500 
417 88.5 18.75 
500 95 18.5 
625 93 29.8 
833 93.5 55.5 
Distance between electrodes (cm) 1 [Dye] = 200 mg/L,pH = 5, [Na2S2O8] = 500 mg/L, [FeSO4] = 100 mg/L, I = 0.5 A 92 15.7 2 
2 95.5 16 
3 95 23.2 
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