Skip to main content

Table 3 Box–Behnken experimental design of A. niveus

From: Optimization of chromium and tannic acid bioremediation by Aspergillus niveus using Plackett–Burman design and response surface methodology

Run A: glucose g/L B: tannic acid % C: metal dose ppm D: NH4Cl g/L Cr removal % Residual TA %
A* value P* value A* value P* value
1 0 + 1 − 1 0 80.97 82.39 49.03 49.10
2 0 + 1 0 + 1 86.11 85.54 49 48.94
3 − 1 − 1 0 0 89.42 90.50 4.38 4.38
4 0 0 +1 − 1 89.98 90.13 26.32 26.37
5 +1 0 0 + 1 84.21 84.50 26.29 26.28
6 0 0 0 0 89.84 88.66 26.3 26.26
7 + 1 0 − 1 0 83.66 83.55 26.33 26.31
8 − 1 0 − 1 0 83.81 82.91 26.59 26.55
9 0 0 − 1 + 1 83.26 83.21 26.47 26.45
10 + 1 0 0 − 1   
11 + 1 + 1 0 0 89.54 88.57 48.84 48.88
12 0 0 0 0 90.61 88.66 26.26 26.26
13 0 0–1 0 + 1 88.85 89.25 4.47 4.39
14 0 0 + 1 + 1 85.67 85.06 26.27 26.37
15 0 0 0 0 85.76 88.66 26.3 26.26
16 0 0 − 1 − 1 78.12 78.82 26.54 26.48
17 0 0 0 0 89.14 88.66 26.28 26.26
18 + 1 − 1 0 0 90.62 91.16 4.29 4.34
19 + 1 0 + 1 0 89.40 89.67 26.45 26.39
20 − 1 0 0 + 1 88.13 88.69 26.4 26.47
21 0 + 1 0 − 1 88.51 87.48 48.98 48.96
22 0 − 1 − 1 0 86.73 85.68 4.26 4.34
23 0 − 1 +1 0 91.94 91.08 4.45 4.45
24 − 1 0 +1 0 90.48 89.95 26.34 26.26
25 − 1 +1 0 0 89.31 88.88 48.97 48.95
26 0 0 0 0 87.91 88.66 26.17 26.26
27 − 1 0 0 − 1 84.38 84.66 26.28 26.35
28 00 − 1 0 − 1 88.06 87.99 4.45 4.41
29 00 +1 +1 0 88.54 90.15 48.81 48.80
  1. A* value actual value, P* value predicted value