Assessing the Ecological Risk of Polycyclic Aromatic Hydrocarbons in Sediments at Langkawi Island, Malaysia

Table 7

Rotated component loadings of the principal components (PCs) for PAH composition in the sediment of Langkawi Island.

PAHs	PC1	PC2	PC3	PC4	PC5
Naphthalene	—		—	—	0.87
1-Methylnaphthalene	—	0.55	—	—	0.35
2-Methylnaphthalene	0.33	0.49	—	0.49	—
Acenaphthylene	—	0.97	—	—	—
Acenaphthene	—	0.82	—	—	—
Fluorene	0.87	—	—	—	—
Phenanthrene		—	—	—	0.90
Anthracene	0.62	—	—	—	—
Fluoranthene	—	0.77	—	—	—
Pyrene	0.96		—	—	—
Benzo[a]anthracene	—	0.61	0.39	—	—
Chrysene	0.89	—	—	—	—
Benzo[b]fluoranthene	—	—	0.91	—	—
Benzo[k]fluoranthene	—	—	0.86	—	—
Benzo[a]pyrene	—	—	0.90	—	—
Indeno[123-cd]pyrene	—	—	—	0.87	—
Dibenzo[ah]anthracene	—	—	—	0.86	—
Benzo[ghi]perylene	0.86	—	—		—
Explained variance (%)	21.8	19.5	17.4	11.8	11.7

Rotation method: Varimax with Kaiser Normalization.
—: PCA loading values lower than 0.3 are not presented.