Multi-scale SEM-EDS characterization of road dust particles: integrating heterogeneity and regional disparity to constrain PMF source apportionment

Key Points

• Characterization of road dust particles indicates significant heterogeneity across different regions, impacting air quality assessments.
• Key metrics show that integrating SEM and EDS techniques enhances the accuracy of PMF source apportionment by resolving complex particle sources.
• The observational analysis incorporates multi-scale techniques to capture regional disparities in dust composition and sources effectively.
• These findings underscore the need for region-specific strategies in air quality management to address localized pollution sources.