资源环境科技发展态势分析平台

The emission characteristics of biomass combustion in rural household stoves were measured in northern China. The Electrical Low-Pressure Impactor plus (ELPI+) was used to collect the emitted particles in the size range of 0.006–9.890 μm. The particle number concentration (PNC), particle mass concentration (PMC), and size distribution characteristics of organic carbon (OC), elemental carbon (EC), and water-soluble ions were analyzed. The experimental results showed that the PNC peaked at 0.006–0.030 μm, and the PMC peaked at 0.257–0.603 μm. The mass concentration of OC and EC exhibited a “bell-shaped” size distribution in the 0–10 μm range. The OC content of particles reached its peak at 0.006–0.016 μm and ranged from 25% to 38%. The mass concentration and percentage of K⁺ and Cl⁻ showed “bell-shaped” size distribution characteristics and the contents of K⁺ and Cl⁻ in each particle size group were significantly correlated. The chemical source profiles of PM_0.1, PM₁, PM_2.5, and PM₁₀ were constructed, whose main components were OC, EC, K⁺, and Cl⁻. PM_2.5 profile included 8.39–20.27% OC, 1.94–20.96% EC, 0.25–13.36% K⁺, and 0.36–16.97% Cl⁻.