3.3.2. PAH
The median concentrations of 11 PAH present in the sludge
& filter cakes (S&F) of 8 thermal processes were used to perform
the multivariate statistical analysis of PAH. Fig. 4a represents
the association between the PAH whereas the Fig. 4c represents
the association between 8 thermal processes. PC1, PC2, and PC3
explained 32%, 32%, and 27% (total of 91%) of the variance in Fig. 4a
and 36%, 27% and 27% (total 90%) of variance in Fig. 4c. Fig. 4b
and d represents the hierarchical cluster dendrogram of association
between PAH and the association between thermal processes
respectively.