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Polycyclic aromatic hydrocarbons (PAHs) concentrations were determined in sediments and three types of wetland plants collected from the intertidal flats in the Chongming wetland. The concentration of total PAHs in sediments ranged from 38.7 to 136.2ngg −1 . Surface sediment concentrations were higher in regions with plant cover than in bare regions. Rhizome-layer sediments (56.8–102.4ngg...
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