Assessment and Implication of PAHs and Compound-Specific δ¹³C Compositions in a Dated Marine Sediment Core from Daya Bay, China.

ABSTRACT: PAHs in a sediment core covering ~120 years from Daya Bay in South China Sea were extracted using Soxhlet and high performance thin layer chromatography, and the compound-specific δ¹³C were analyzed using gas chromatography-combustion-isotopic ratio mass spectrometry. The concentrations of PAHs ranged from 99.3 to 676 ng g^-1, with high molecular weight PAHs as a key component. PAHs' compound-specific δ¹³C ranged from -35.02‱ to -16.14‱. The patterns of 16 PAHs, molecular ratios, and compound specific δ¹³C compositions indicate important pyrolytic and petrogenic sources: PAHs derived predominantly from pyrogenic sources (including coal and wood incomplete combustion) before the 1960s, while after the 1960s, they derived predominantly from mixed py

SUBMITTER: Lu Y 

PROVIDER: S-EPMC9029777 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature