Journal
MARINE POLLUTION BULLETIN
Volume 104, Issue 1-2, Pages 347-354Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2016.01.036
Keywords
Polycyclic aromatic hydrocarbons; Source apportionment; Seasonal variations; Positive matrix factorization; Yangtze River Estuary
Funding
- National Natural Science Foundation of China [41571486]
- Ministry of Education and Social Science Fund [14YJAZH048]
- CRSRI Open Research Program [CKWV2014223/KY]
- National Basic Research Program of China (973 Project) [2010CB429003]
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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. (C) 2016 Elsevier Ltd. All rights reserved.
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