[Establishment and application of replaceable source profiles of PM10].

Area of Science:

• Environmental Science
• Atmospheric Chemistry
• Geochemistry

Background:

• Accurate source profiles are crucial for regional air pollution apportionment.
• Existing source profiles may not be universally applicable across diverse geographical areas.
• Developing region-specific profiles enhances the accuracy of pollution source identification.

Purpose of the Study:

• To establish replaceable source profiles for various pollutant sources across 35 cities.
• To evaluate the applicability and regional variations of these source profiles.
• To provide a foundation for more accurate source apportionment studies.

Main Methods:

• Hierarchical cluster analysis for grouping similar source profiles.
• Variance analysis to validate clustering and regional divisions.
• Principal component analysis for establishing weighting sums.
• Chemical Mass Balance (CMB) model for evaluating profile accuracy using correlation coefficient (R), coefficient of divergence (CD), and relative error (RE).

Main Results:

• 13 replaceable source profiles were generated for six pollutant source types.
• Coal combustion fly ash and metal smelt dust profiles are suitable for direct use.
• Construction cement dust profiles showed no significant regional divisions.
• Vehicle exhaust dust profiles require further determination due to data limitations.
• Soil dust and re-suspended dust profiles need additional research.

Conclusions:

• The study successfully developed 13 replaceable source profiles applicable to regional source apportionment.
• The findings highlight the need for region-specific profiles and further research on certain dust types.
• The established profiles offer a valuable resource for improving air quality management strategies.