Sources and elemental composition of ambient PM(2.5) in three European cities

Area of Science:

• Environmental Science
• Atmospheric Chemistry
• Air Quality Management

Background:

• Urban air quality is a significant public health concern, with fine particulate matter (PM2.5) being a major component.
• Understanding the sources of PM2.5 is crucial for developing effective pollution control strategies.

Purpose of the Study:

• To perform source apportionment of urban fine particle mass (PM2.5) in Amsterdam, Erfurt, and Helsinki.
• To compare PM2.5 source categories across these European cities.

Main Methods:

• Utilized principal component analysis (PCA) and multiple linear regression for source apportionment.
• Analyzed PM2.5 data collected in Amsterdam and Erfurt between 1998-1999.
• Compared results with previously published data from Helsinki.

Main Results:

• Identified six PM2.5 source categories in Amsterdam: traffic (30%), secondary particles (34%), crustal material (7%), oil combustion (11%), industrial/incineration (9%), and sea salt (2%).
• Identified four PM2.5 source categories in Erfurt: traffic combustion (32%), secondary PM (32%), crustal material (21%), and industrial processes (8%).
• Secondary particles and local combustion (mainly traffic) were the dominant PM2.5 sources in all three cities.

Conclusions:

• Secondary particles and traffic emissions are key contributors to urban PM2.5 in Amsterdam, Erfurt, and Helsinki.
• Amsterdam and Erfurt showed similar impacts from secondary particles and local combustion.
• Helsinki's PM2.5 was significantly influenced by secondary particles, transboundary pollution, and regional combustion sources.