Spatial Distribution and Sources of Polycyclic Aromatic Hydrocarbons in Sediments from Dachan Bay, Shenzhen City

The study investigated the composition and content of Σ15PAH in surface core sediments from Dachan Bay (DCB) Shenzhen city discussed effects urban development regional energy structure on marine environment through spatial distribution, vertical profile, sources Σ15PAH. results indicated that concentrations DCB ranged between 299 ng/g 2336 65 994 sediments. horizontal distribution PAHs with decreasing coastal to central areas implied land-based input PAHs. profile high concentration 0 cm–60 cm suggested pollution is attributed since 1950, especially after 1980s. According features low molecular weight (LMW)/high (HMW), diagnostic ratios their relationships total organic carbon (TOC) oil, pyrogenic were mainly combustion petroleum byproducts but biomass 60 cm–190 sediments, which corresponded variation surrounding areas. This have a great impact further controls pollutant emissions are still needed.