AI Article Synopsis
- Sediment core samples from Lake Chaohu were analyzed to understand the distribution of 15 priority polycyclic aromatic hydrocarbons (PAHs) over the last century.
- Two distinct stages of PAH input were noted in the eastern region (before and after the 1970s), while the western region showed three stages (before the 1950s, 1950s-1990s, and after the 1990s).
- Increased PAH levels correlated with human activities, indicating that both sediment conditions and socioeconomic factors significantly influence the PAH composition and abundance in the lake.
Article Abstract
Sediment core samples collected from Lake Chaohu were analyzed for 15 priority polycyclic aromatic hydrocarbons (PAHs) to assess the spatial and temporal distributions of the PAHs during lacustrine sedimentary processes and regional economic development. Assessing the PAH sedimentary records over an approximately 100-year time span, we identified two stages in the PAH inputs and sources (before the 1970s and after the 1970s) in the eastern lake region near a village, whereas three stages (before the 1950s, 1950s-1990s and after the 1990s) were identified in the western lake region near urban and industrial areas. Rapid increases in the PAH depositional fluxes occurred during the second stage due to increased human activities in the Lake Chaohu basin. The composition and isomeric ratios of the PAHs revealed that pyrolysis is the main source of PAHs in this lake. Strong positive relationships between PAH concentration and the total organic carbon concentration, sediment grain size (<4μm), as well as the local population and Gross Domestic Product indicated that the sedimentary conditions impact the depositional characteristics of the PAHs; simultaneously, socioeconomic activities, such as energy consumption and the levels of urban industrialization and civilization, affect both the composition and abundance of the PAHs.
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| http://dx.doi.org/10.1016/j.jes.2015.05.007 | DOI Listing |
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