郑州市氧化铝工业炉窑污染物及源谱特征

采用稀释通道采样法对郑州市一家拜耳法氧化铝企业及一家α-氧化铝企业的PM_2.5、PM₁₀样品进行采集，利用烟气分析仪检测SO₂和NO_x气体的质量浓度.对颗粒物样品中的38种化学组分进行分析，构建相应的源成分谱，运用分歧系数（CD）和组分差异权重分布函数R/U对其特征进行对比研究.结果表明：α-氧化铝源谱中以Cl^-为主（质量分数18.29%~25.21%），拜耳法氧化铝源谱中以OC和NO₃^-为主（质量分数9.01%~41.87%）.源谱间的分歧系数（CD）显示，同一种生产工艺两种粒径间的源谱比较相似，相同粒径的两种生产工艺之间的源谱差异较大.R/U值对比结果显示，EC、Ca、F^-和Cl^- 4种元素可作为区分两种氧化铝生产工艺的标识组分.

Characterization of particulate matter Source profiles and pollutant from alumina industrial furnace in Zhengzhou City

The PM_2.5 and PM₁₀ samples of a Bayer process alumina company and an α-alumina enterprise in Zhengzhou City were collected by thedilution channel sampling method, the mass concentration of SO₂ and NO_x were detected by a flue gas analyzer. The 38chemical components in the particulate samples were analyzed to identify source profiles. Using the coefficient of divergence (CD) and the component difference weight distribution function R/U for a comparative study of the source profiles characteristics. The dominant composition of PM_2.5 and PM₁₀ in α-alumina plant profiles was Cl^-, with the percentage ranging from 18.29% to 25.21%. The Bayer process alumina sourceprofileswas dominated by OC and NO₃^-, with the percentage ranging from 9.01% to 41.87%. The coefficients of divergence (CD) between PM_2.5 and PM₁₀ source profiles from the same process were similar, indicating that the source profiles of PM_2.5 might be similar to those in PM₁₀. And the source profiles of the same particle size from different process were differ greatly. The comparison of R/U values showed that EC, Ca, F^- and Cl^-could be used as the identified components to distinguish the two alumina production processes.