Carbonaceous Aerosol Emitted from Biofuel Household Stove Combustion in South China

oleh: Xuefang Sang-Arlt, Haoxiang Fu, Yinan Zhang, Xiang Ding, Xinming Wang, Yanan Zhou, Lilin Zou, Georg F. Zellmer, Guenter Engling

Format: Article
Diterbitkan: MDPI AG 2020-01-01

Deskripsi

Near-source measurements of smoke emissions from household stove combustion in a rural area of South China were conducted with 7 typical biomass fuels. Particulate matter samples (both PM<sub>10</sub> and PM<sub>2.5</sub>) were analyzed for their carbonaceous components, including organic and elemental carbon (OC, EC) as well as levoglucosan (molecular tracer of biomass burning), employing thermal-optical and GC-MS analysis. The OC and EC content in PM<sub>2.5</sub> and PM<sub>10</sub> smoke particles derived from the various types of vegetation showed different patterns with the smallest values observed for straw type fuels. The OC/EC ratios in PM<sub>2.5</sub> and PM<sub>10</sub> showed an order of straw &gt; hardwood &gt; bamboo &gt; softwood. Mass concentrations of particulate matter emitted from rice straw burning were highest with 12.23 &#177; 0.87 mg/m<sup>3</sup> (PM<sub>10</sub>) and 9.31 &#177; 0.81 mg/m<sup>3</sup> (PM<sub>2.5</sub>), while the mass ratios (LG/PM and OC/PM) were lowest among the 7 fuels, indicating that particle emissions from straw burning were higher than those from woody fuels, using similar burning conditions. The levoglucosan emission ratios were rather high and this single most abundant organic species was mainly present in the fine particle mode. Linear correlation analysis showed a strong relationship between levoglucosan and EC emissions.