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Sea microlayer (SML) and subsurface water (SSW) samples were collected around Xiamen Island to study the enrichment and partitioning of polycyclic aromatic hydrocarbons (PAHs). Total PAH concentrations ranged from 93.43 to 411.05ng L −1 in the SML and 49.29–279.42ng L −1 in the SSW. Compared with the results of previous studies before pollution control measurements, PAHs levels decreased...