Journal of Geochemical Exploration | 2021
Spatial-temporal variations and transport process of polycyclic aromatic hydrocarbons in Poyang Lake: Implication for dry–wet cycle impacts
Abstract
Abstract The dry-wet cycles of the lake-catchment system may affect the spatial-temporal variations and transport of specific volatile organic compounds. In this study, we analyzed 16 priority polycyclic aromatic hydrocarbons (PAHs) in water, suspended particulate matter (SPM), air, soil and sediment in the Poyang Lake, which is the largest freshwater lake in Southeast China. The samples were collected from intertidal zone of the Poyang Lake, in both the dry and wet seasons, corresponding to the exposure and submersion periods, respectively. Concentrations of target PAHs in air, water, SPM and sediments were 0.8–13.5 ng/m3, 5.1–62.0 ng/L, 117–4651 ng/g and 16.4–775 ng/g, respectively. Concentrations of PAHs in sediments were found to be significantly related to total organic carbon and water content (p