Two typical types of electronic waste (E-waste) were selected to investigate the emission characteristics of polycyclic aromatic hydrocarbons (PAHs) during pyrolytic processing, including emission factor, compositional profile, size distribution and gas-particle partitioning. The mean emission factors (EFs) of total PAHs were measured to be 2.77 ± 1.41 μg/g and 23.65 ± 14.52 μg/g for printed wiring boards and plastic casings, respectively, lower than those for coal combustion and biomass burning. Low molecular weight species were predominant in exhaust fumes, with overwhelming amounts of naphthalene (NAP) and phenanthrene (PHE) in the gaseous phase and particulate phase, respectively. The particle-size distribution exhibited the largest enrichment of total PAHs in finer particles less than 2.1 μm. Similarly, the distributions of individual species were dominated by finer particles. Most freshly emitted PAHs were liable to exist in particulate phase relative to gaseous phase. Based on the benzo[a]pyrene equivalent carcinogenic power, PAHs in particulate phase may have much stronger toxicity compared with those present in gaseous phase. The gas-particle partitioning behaviors of freshly emitted PAHs from pyrolytic processing of E-wastes were mainly regulated by absorption rather than adsorption, and the gas-particle partitioning did not reach equilibrium.

选择了两种典型的电子废物（电子废物）来研究热解过程中多环芳烃（PAH）的排放特征，包括排放因子，组成分布，尺寸分布和气体颗粒分配。对于印刷线路板和塑料外壳，总PAH的平均排放因子（EFs）分别为2.77±1.41μg/ g和23.65±14.52μg/ g，低于燃煤和生物质燃烧的平均排放因子。低分子量物质在废气中占主导地位，气相和颗粒相中分别有大量的萘（NAP）和菲（PHE）。粒径分布在小于2.1μm的较细颗粒中表现出最大的PAHs富集。相似地，单个物种的分布以较细的颗粒为主。相对于气相，大多数新鲜排放的PAH易于以颗粒相存在。基于苯并[a] py当量的致癌能力，与气相相比，颗粒相中的PAHs可能具有更强的毒性。电子废物热解过程中新排放的多环芳烃的气体颗粒分配行为主要受吸收而不是吸附的调节，并且气体颗粒分配未达到平衡。