Compositional transition and coupled formation pathways of PM2.5 pollution in a typical industrial city: An empirical study based on Handan, China.
Under ongoing emission-control measures, PM2.5 pollution in industrial cities is increasingly shaped by changes in chemical composition and secondary aerosol formation. This study investigates the compositional transition of PM2.5 and the coupled formation mechanisms of secondary aerosols in Handan, a typical industria...