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Table 3 Mathematical models obtained using Statgraphics Centurion XV.2 software for the studied responses. All data had a confidence level of over 95.0%

From: Nb2O5 monolith as an efficient and reusable catalyst for textile wastewater treatment

Response

Mathematical models*

Eq.

R2

p-Value

F-Value

MB degradation

Y1(%) = 107.02 − 4.08 x1 − 0.0106 x1 x3 + 0.4412 x1 x4 − 0.6202 x4

7

0.986

0.0001

322

COD reduction

Y2 (%) = 33.77 − 4.43 x1 + 8.42 x4

8

0.795

0.0001

29

  1. * x1: pH, x2: initial methylene blue concentration, x3: initial hydrogen peroxide concentration, x4: catalyst loading