Fig 1.
Chemical Structure of Acid Blue 113.
Table 1.
EDX analysis of ZSM-5 and Fe-ZSM-5.
Table 2.
Pore structure characteristics of the ZSM-5 support and Fe-ZSM-5 catalyst.
Table 3.
Taguchi Design Factors and their levels.
Table 4.
L27 orthogonal design, experimental results, and Taguchi analysis for run 1 to 16,
Table 5.
L27 orthogonal design, experimental results, and Taguchi analysis for run 17 to 27.
Table 6.
Theoretical framework of the Taguchi method coupled with principle component analysis (PCA).
Fig 2.
SEM images of (a) the Fe(byp) complex, (b) ZSM-5, and (c) Fe-ZSM-5.
Fig 3.
FTIR data for (a) the ZSM-5, (b) Fe-ZSM-5, and (c) Fe(byp) complex.
Table 7.
The obtained S/N ratios, normalized S/N ratios, and TPCI values for run 1 to 15.
Table 8.
The obtained S/N ratios, normalized S/N ratios, and TPCI values for run 16 to 27.
Table 9.
Eigenvalues and Eigenvectors obtained through PCA processing of the normalized S/N ratios.
Fig 4.
Mean TPCI plots with respect to parameter changes.
Table 10.
List of TPCI responses.
Table 11.
Optimized values for heterogeneous Fenton oxidation.
Table 12.
ANOVA analysis.
Fig 5.
Interaction of parameters with respect to TOC.
Fig 6.
Interaction of parameters with respect to decolorization.
Fig 7.
Interaction of parameters with respect to degradation.
Fig 8.
SEM images of the (a) fresh and (b) spent Fe-ZSM-5.
Fig 9.
FTIR spectra of the (a) fresh and (b) spent Fe-ZSM-5.
Table 13.
Comparison of synthesized Fe-ZSM-5 with other catalysts used for the degradation of Acid Blue 113.
Table 14.
Efficiency comparison chart of different Fe-ZSM-5 catalysts used for the degradation of dyes.
Fig 10.
Degradation and TOC removal of mixture of dyes using Fe-ZSM-5.