Table 2 Experimental variables and responses for MB degradation using Nb2O5/Al2O3/Al catalyst
From: Nb2O5 monolith as an efficient and reusable catalyst for textile wastewater treatment
Run | x1: pH | x2 : CMB, 0 (mg L−1) | \( {\mathrm{x}}_3:{\mathrm{C}}_{{\mathrm{H}}_2{\mathrm{O}}_{2,0}} \) (mM) | x4 : ω (\( {\mathrm{kg}}_{{\mathrm{Nb}}_2{\mathrm{O}}_5} \) m− 3) | Y1:MB degradation (%) | Y2:COD reduction (%) |
|---|---|---|---|---|---|---|
1 | 4 | 15 | 40 | 7.86 | 98 | 79 |
2* | 6 | 30 | 60 | 5.24 | 88 | 55 |
3 | 4 | 45 | 40 | 2.62 | 93 | 43 |
4 | 4 | 45 | 80 | 7.86 | 96 | 91 |
5 | 4 | 45 | 40 | 7.86 | 98 | 78 |
6 | 4 | 15 | 80 | 2.62 | 91 | 57 |
7 | 4 | 15 | 80 | 7.86 | 97 | 73 |
8 | 8 | 15 | 40 | 7.86 | 94 | 88 |
9 | 4 | 45 | 80 | 2.62 | 91 | 22 |
10 | 4 | 15 | 40 | 2.62 | 90 | 32 |
11* | 6 | 30 | 60 | 5.24 | 89 | 53 |
12 | 8 | 45 | 80 | 2.62 | 75 | 22 |
13 | 8 | 15 | 40 | 2.62 | 78 | 15 |
14 | 8 | 15 | 80 | 2.62 | 75 | 10 |
15 | 8 | 15 | 80 | 7,86 | 91 | 75 |
16 | 8 | 45 | 40 | 7.86 | 94 | 55 |
17 | 8 | 45 | 40 | 2.62 | 80 | 26 |
18 | 8 | 45 | 80 | 7.86 | 90 | 42 |