The chemical composition and morphology of particles emitted from a WFGD system were analyzed. The inlet particle diameter, inlet particle concentration and liquid/gas ratio (L/G), were all found to affect particle emissions. Smaller diameter particles and higher inlet particle concentrations resulted in increases Si and total particle mass concentrations. The elemental mass concentrations of the emitted particles were mainly derived from inlet components, along with low levels of Ca, S, AL, Mg and other trace elements carried from slurry in the spray scrubber, with the Ca and S content of emitted particles predominantly being carried from the slurry. The particles emitted from WFGD were mainly fine particles, with up to 96% and 50% of particles being below 2.5 mu m and 1 mu m, respectively. Particles with a diameter below 0.5 mu m accounted for only 8.89%, 7.6% and 16.4% of particle emissions when the inlet particles sizes were 38.55 mu m 13.42 mu m and 6.16, respectively. The mean diameter of particles emitted from the WFGD system ranged between 0.6 and 1.2 mu m. These results confirm the particle removal ability of the WFGD system and improve our understanding of the chemical composition and morphology of particles emitted from WFGD systems, as well as their impact on the atmospheric environment. (C) 2019 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.