Emission of Oxygenated Polycyclic Aromatic Hydrocarbons from Indoor Solid Fuel Combustion

• DOI: 10.1021/es104364t
• Publication Date: 2011-03-04T19:31:55Z
• Authors: Guofeng Shen; Shu Tao; Wei Wang; Yifeng Yang; Junnan Ding; Miao Xue; Yujia Min; Chen Zhu; Huizhong Shen; Wei Li; Bin Wang; Rong Wang; Wentao Wang; Xilong Wang; Armistead G. Russell
• Keywords: Stove; Solid fuel; Crop Residue

Indoor solid fuel combustion is a dominant source of polycyclic aromatic hydrocarbons (PAHs) and oxygenated PAHs (OPAHs) the latter are believed to be more toxic than former. However, there limited quantitative information on emissions OPAHs from combustion. In this study, emission factors (EFOPAH) for nine commonly used crop residues five coals burnt in typical residential stoves widely rural China were measured under simulated kitchen conditions. The total EFOPAH ranged 2.8 ± 0.2 8.1 2.2 mg/kg tested 0.043 71 various 9-fluorenone was most abundant specie. indoor residue burning 1−2 orders magnitude higher those open burning, they affected by properties conditions, like moisture efficiency. For both coals, significantly positive correlations found between EFs individual parent PAHs. An oxygenation rate, Ro, defined as ratio PAH species describe formation potential OPAHs. studied OPAH/PAH pairs, mean Ro values 0.16−0.89 0.03−0.25 coals. burned cooking stove much lower ambient air, indicating influence secondary OPAH loss comparison with PAHs, showed tendency associated particulate matter (PM), especially fine PM, dominate size ranges 0.7−2.1 μm high caking <0.7 low briquettes.