Polycyclic Aromatic Hydrocarbons in Sediments from Typical Algae, Macrophyte Lake Bay and Adjoining River of Taihu Lake, China: Distribution, Sources, and Risk Assessment

Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental pollutants in sediments and pose a serious risk for freshwater ecosystems. In this study, sediment samples from 24 sites were collected the cyanobacterial bloom-occurring, macrophyte-growing lake bay adjoining river of Taihu Lake. Here, concentration levels, sources, assessment 16 priority PAHs surface typical algae, macrophyte Lake, investigated, results compared with those previous studies. The total PAH (?PAH) concentrations ranged 4900 to 16,800 ng·g?1 Lake 5736.2 69,362.8 river. level riverine was significantly higher than bay, that Dongshan River Mashan River, while there no significant difference between bloom-occurring zone. indicated petroleum contamination dominated derived combined combustion including wood, coal combustion, according identification by molecular diagnostic ratio principal component analysis (PCA). Sediment based on quality guidelines (SQGs) suggested partial regions subjected potential ecological 3-ring 5-ring PAHs, existed negative effects related naphthalene pollutant all survey regions. showed high risk.