Identifications and seasonal variations of sources of polycyclic aromatic hydrocarbons (PAHs) in the Yangtze River Estuary, China

• Published in: Marine pollution bulletin Vol. 104; no. 1-2; pp. 347 - 354
• Main Authors: Yu, Wenwen, Liu, Ruimin, Xu, Fei, Men, Comg, Shen, Zhenyao
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 15.03.2016
• Subjects: autumn; Brackish; China; Coal; coal tar; Coke; combustion; emissions; Environmental Monitoring; Estuaries; Gasoline; Geologic Sediments; grasses; Marine; Models, Theoretical; pollutants; Polycyclic aromatic hydrocarbons; Polycyclic Aromatic Hydrocarbons - analysis; Positive matrix factorization; Rivers - chemistry; seasonal variation; Seasonal variations; Seasons; Source apportionment; spring; summer; Water Pollutants, Chemical - analysis; water pollution; Water Pollution, Chemical - statistics & numerical data; winter; wood; Yangtze River Estuary; China; Yangtze River; China, People's Rep., Changjiang R; Seasonal variations; Yangtze River Estuary; Polycyclic aromatic hydrocarbons; Source apportionment; Positive matrix factorization
• ISSN: 0025-326X; 1879-3363
• DOI: 10.1016/j.marpolbul.2016.01.036

In this study, positive matrix factorization models (PMFx) were used to analyze the sources of sedimentary PAHs in Yangtze River Estuary (YRE) using 120 data samples from 30 sites collected over four seasons. Three sources were defined for the PAHs: coal and gasoline combustion was the dominant source, accounting for approximately 50%; coke plant emissions and wood or grass combustion each contributed approximately 25%. The coal tar origin was the major source in summer; wood or grass combustion dominated in autumn; coal combustion was the primary source of PAHs in spring and winter. More than 90% of the coke plant emissions were from summer, while pollutants from wood or grass combustion were discharged primarily in autumn. These three sources distributed in different primary regions, the spatial patterns of coal combustion presented an increasing trend in the seaward direction. •Identification and seasonal variation of PAHs sources were studied used PMFx.•Three sources were identified; the main one was coal and gasoline combustion.•Most of PAHs came from summer, while the spring contributed the least.•The proportions of different sources were various in each season.•The contributions of four seasons to each source were also different.