Coal combustion in the domestic stoves,which is common in most parts of the Chinese countryside,can release harmful substances into the air and cause health issues.In this study,particles emitted from laboratory stove combustion of the raw powder coals were analyzed for morphologies and chemical compositions by using transmission electron microscopy (TEM) coupled with energy-dispersive X-ray spectrometry (EDX).The coal buming-derived individual particles were classified into two groups:carbonaceous particles (including soot aggregates and organic particles) and non-carbonaceous particles (including sulfate,mineral and metal particles).The non-carbonaceous particles,which constituted a majority of the coal bing-derived emissions,were subdivided into Si-rich,S-rich,K-rich,Ca-rich,and Fe-rich particles according to the elemental compositions.The Si-rich,S-rich and K-rich particles are commonly observed in the coal bing emission.The proportions for particles of different types exhibit obvious coal-issue dependence.Bing of coal with high ash yield could emit more non-carbonaceous particles,and bing of coal with high sulfur content can emit more S-rich particles.By comparing the S-rich particles from this coal bing experiment with those in the atmosphere,we draw a conclusion that some S-rich particles in the atmosphere in China could be mainly sourced from coal combustion.