源自住宅生物质燃烧和煤炭燃烧的 PM 排放中多环芳烃的双亲、烷基化、氧化和硝化：14 种供暖情景的新型数据库。
Parent, alkylated, oxygenated and nitrated polycyclic aromatic hydrocarbons in PM emitted from residential biomass burning and coal combustion: A novel database of 14 heating scenarios.
机构信息
Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China; Key Lab of Aerosol Chemistry & Physics, SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710049, China.
Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China; Key Lab of Aerosol Chemistry & Physics, SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710049, China.
出版信息
Environ Pollut. 2021 Jan 1;268(Pt A):115881. doi: 10.1016/j.envpol.2020.115881. Epub 2020 Oct 16.
To characterize the emissions of polycyclic aromatic hydrocarbons (PAHs) from residential biomass burning and coal combustion in field environments, smoke samples were collected from the combustion of six types of biomass in heated kangs and four types of coal in traditional stoves and semi-gasifier stoves. The emission factors (EFs) of the total PAH were in the range of 84.5-344 mg/kg for biomass burning, with lower EFs for biomass with higher densities, and in the range of 38.0-206 mg/kg for coal combustion, with lower EFs for coals with higher maturity. Moreover, EFs were lower from high-density biomass fuels (wood trunk, 84.5 ± 11.3 mg/kg) than low-maturity coals (bituminous coal, 206 ± 16.5 mg/kg). Parent, oxygenated, alkylated, and nitrated PAHs accounted for 81.1%, 12.6%, 6.2%, and 0.1%, respectively, of the total-PAH EFs from biomass burning, and 84.7%, 13.8%, 1.4%, and 0.1%, respectively, of the total-PAH EFs from coal combustion. PAH source profiles differed negligibly between biomass fuels but differed significantly between bituminous coal and anthracite coal fuels. The characteristic species of sources were phenanthrene, 9-fluorenone, and 2-nitrobiphenyl for biomass burning, and were phenanthrene, benzo[ghi]perylene, 1,4-naphthoquinone, and 2-nitrobiphenyl for coal combustion. The ratios of benzo[b]fluoranthene/(benzo[b]fluoranthene + benzo[k]fluoranthene) were 0.40-0.45 for biomass burning and 0.89-0.91 for coal combustion, and these significantly different values constitute unique markers for distinguishing these fuels in source apportionment. Benzo[a]pyrene-equivalent factor emissions were 2.79-11.3 mg/kg for biomass and 7.49-41.9 mg/kg for coal, where parent PAHs contributed 92.0%-95.1% from biomass burning and 98.6%-98.8% from coal combustion. Total-PAH emissions from residential heating were 1552 t across Shaanxi province, to which wheat straw (445 t) in biomass burning and bituminous coal (438 t) in coal combustion were the highest contributors. Results from this study provide crucial knowledge for the source identification of PAHs as well as for the design of abatement strategies against pollutant emissions.
为了描述住宅生物质燃烧和煤炭燃烧过程中多环芳烃（PAHs）的排放特征，在野外环境中采集了六种生物质在加热炕上燃烧和四种煤炭在传统炉灶和半气化炉灶中燃烧所产生的烟雾样本。生物质燃烧的总多环芳烃排放因子（EF）范围为 84.5-344mg/kg，密度较高的生物质的 EF 较低，而煤炭燃烧的总多环芳烃排放因子（EF）范围为 38.0-206mg/kg，成熟度较高的煤炭的 EF 较低。此外，高密度生物质燃料（树干）的 EF（84.5±11.3mg/kg）低于低成熟度煤炭（烟煤）的 EF（206±16.5mg/kg）。生物质燃烧的总多环芳烃 EF 中，母体、含氧、烷基化和硝化多环芳烃分别占 81.1%、12.6%、6.2%和 0.1%，而煤炭燃烧的总多环芳烃 EF 中，母体、含氧、烷基化和硝化多环芳烃分别占 84.7%、13.8%、1.4%和 0.1%。生物质燃料之间的多环芳烃源谱差异可以忽略不计，但烟煤和无烟煤燃料之间的差异非常明显。生物质燃烧的源特征种为菲、9-芴酮和 2-硝基联苯，而煤炭燃烧的源特征种为菲、苯并[ghi]苝、1,4-萘醌和 2-硝基联苯。苯并[b]荧蒽/（苯并[b]荧蒽+苯并[k]荧蒽）比值为生物质燃烧的 0.40-0.45，煤炭燃烧的 0.89-0.91，这些显著不同的值构成了在源解析中区分这些燃料的独特标记。生物质燃烧的苯并[a]芘等效因子排放量为 2.79-11.3mg/kg，煤炭燃烧的苯并[a]芘等效因子排放量为 7.49-41.9mg/kg，其中母体多环芳烃的贡献率为生物质燃烧的 92.0%-95.1%，煤炭燃烧的 98.6%-98.8%。陕西省住宅供暖的总多环芳烃排放量为 1552t，其中生物质燃烧的小麦秸秆（445t）和煤炭燃烧的烟煤（438t）是排放量最高的两种燃料。本研究的结果为多环芳烃的源识别以及针对污染物排放的减排策略的设计提供了重要的知识。
Zotero 插件