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Table 2 Range of the variables and the designed experiments as well as the corresponding responses for the PI process ([PQ] = 30 mgL−1, T = 25 °C)

From: Degradation of paraquat herbicide using hybrid AOP process: statistical optimization, kinetic study, and estimation of electrical energy consumption

Variables Range and level
\(-\alpha\) \(-1\) \(0\) \(+1\) \(+\alpha\)
A: IO4 (mg L−1) 110.45 30 60 90 9.54
B: pH 2.29 4 6.5 9 10.70
C: TiO2 (mg L−1) 15.91 50 100 150 184.09
Design matrix
Runs Factors DE (%)
IO4 (mg L−1) pH (mg L−1) (Exp.) (Pred.)
1 90.00 9.00 50.00 76.61 74.62
2 60.00 6.50 100.00 69.90 70.07
3 110.45 6.50 100.00 86.56 87.71
4 30.00 9.00 150.00 45.70 52.70
5 60.00 6.50 184.90 77.42 80.32
6 60.00 2.29 100.00 25.53 35.98
7 60.00 6.50 100.00 70.43 70.07
8 60.00 10.70 100.00 69.62 62.64
9 90.00 4.00 50.00 68.82 62.64
10 60.00 6.50 15.91 56.18 59.81
11 30.00 4.00 150.00 47.58 40.72
12 30.00 4.00 50.00 36.56 28.52
13 9.54 6.50 100.00 25.54 30.33
14 60.00 6.50 100.00 69.89 70.07
15 90.00 4.00 150.00 82.79 74.84
16 60.00 6.50 100.00 69.62 70.07
17 60.00 6.50 100.00 69.35 70.07
18 60.00 6.50 100.00 70.43 70.07
19 30.00 9.00 50.00 44.09 40.50
20 90.00 9.00 150.00 84.14 86.82