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Emissions of parent nitrated and oxygenated polycyclic aromatic hydrocarbons from indoor corn straw burning in normal and controlled combustion conditions

機譯：在正常和受控燃燒條件下室內(nèi)玉米秸稈燃燒過程中母體硝化和氧化的多環(huán)芳烴的排放

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Emission factors (EFs) of parent polycyclic aromatic (pPAHs), nitrated PAHs (nPAHs), and oxygenated PAHs (oPAHs) were measured for indoor corn straw burned in a cooking brick stove in both normal and controlled burning conditions. EFs of total 28 pPAHs, 6 nPAHs and 4 oPAHs were 7.9±3.4, 6.5±1.6×10-3, and 6.1±1.4×10-1 mg/kg, respectively. By controlling the burning conditions, it was found that the influence of fuel charge size on EFs of the pPAHs and derivatives was insignificant. Measured EFs increased significantly in a fast burning mainly because of the oxygen deficient atmosphere formed in the stove chamber with a small volume. In both restricted and enhance air supply conditions, EFs of pPAHs, nPAHs and oPAHs were significantly higher than those measured in normal burning conditions. Though EFs varied in different burning conditions, the composition profiles and calculated isomer ratios were similar without significant differences. The results from the stepwise regression model showed that fuel burning rate, air supply amount, and modified combustion efficiency were three most significant influencing factors, explaining 72-85% of the total variations.
機譯：在正常和受控燃燒條件下，對在烹飪磚爐中燃燒的室內(nèi)玉米秸稈測量了母體多環(huán)芳烴（pPAHs），硝化PAH（nPAHs）和氧化PAHs（oPAHs）的排放因子（EF）?？偣?8個pPAHs，6個nPAHs和4個oPAHs的EFs為7.9±3.4、6.5±1.6×10 -3 和6.1±1.4×10 -1 mg / kg，分別。通過控制燃燒條件，發(fā)現(xiàn)燃料裝料量對pPAHs和衍生物的EFs的影響微不足道?？焖偃紵袦y得的EFs顯著增加，這主要是由于在爐腔中形成了小體積的缺氧氣氛。在受限和增強的空氣供應條件下，pPAH，nPAH和oPAH的EF均顯著高于正常燃燒條件下的EF。盡管EFs在不同的燃燒條件下會有所不同，但其組成特征和計算出的異構體比例卻相似，沒有顯著差異。逐步回歸模型的結果表明，燃料燃燒率，空氣供應量和修正的燃燒效率是三個最重要的影響因素，占總變化的72-85％。

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