The comparative result of Fig. 4a with Fig. 4b can be explained
as follows: PC1 (supplementary material Table S5) showed the
group I PAH (Fig. 4b) as high negative scores whereas it showed
group II(b) as high positive scores. Group II (a) in Fig. 4b was
shown as high positive scores in PC2. The results comparing Fig. 4c
with Fig. 4d are as follows: Group I(a) thermal process in Fig 4d
is shown as high positive scores in PC1 (supplementary material
Table S6) whereas Group I(b) is shown as high positive scores in
PC3. PC2 presents the group II(a) (ZnM and NFe waste) in Fig. 4d
with high positive scores. Waste in glass thermal processing (Group
II (b) in Fig. 4d) showed as negative scores in the entire three
PC.