|
|
|
| Microscopic characteristics of indoor PM10 sourced from different fuels in poor rural areas in Guizhou Province |
|
|
|
|
Abstract High-resolution scanning electron microscopy (SEM) and image analysis were employed to study morphology, number-size, and volume-size distributions of indoor PM10 sourced from different fuels (e.g., coal briquette, coal alone, honeycomb briquette, and wooden fuel) in poor rural areas in Guizhou Province. The results show that the main indoor particles include soot and its aggregates, mineral particles, and fly ash. Soot and its aggregates account for more than 72.69% by numbers in indoor PM10. The number-size distribution of soot and its aggregates and fly ash in PM10 produced by coal and honeycomb briquette shows a single peak mode; Soot and its aggregates show a single peak mode and coal fly ash show bimodal distribution from coal briquette (coal mixed with clay); They show a single peak distribution from firewood. The volume-size distributions of particles in all samples basically show a single peak which mainly appears in particle diameter greater than 1.0μm.
|
|
Received: 14 July 2011
|
|
|
|
|
|
|
