Scholarlink

<p>Elemental carbon (EC), predominantly produced by solid fuel combustion, significantly influences both climate and public health. However, the physicochemical properties of EC-containing particles immediately after emission remain inadequately understood. This study investigates the chemical composition, size distribution, and mixing state of EC-containing particles from five solid fuels: wheat, corn, rice straw, bituminous coal, and anthracite. Using a single-particle aerosol mass spectrometer (SPAMS), we identified seven distinct EC-containing particle types. Our results show that biomass burning primarily produces EC-containing particles obviously coated with organic carbon (EC-OC) and organic nitrogen (EC-CN), with sizes concentrated between 0.4 and 1.0 μm. In contrast, bituminous coal emissions are dominated by sodium-rich EC-containing particles (EC-Na), while anthracite combustion predominantly produces particles coated with sulfate or nitrate (EC-NS). Bituminous coal particles are generally smaller ( &lt; 0.4 μm), likely due to higher volatile content and rapid pyrolysis. The mixing states of EC-containing particles varied markedly. Sulfate (<sup>97</sup>HSO<sub>4</sub><sup>−</sup>) was strongly associated with EC-OC and EC-Na particles, resulting in a highly mixing state. Levoglucosan (<sup>59</sup>C<sub>2</sub>H<sub>3</sub>O<sub>2</sub><sup>−</sup>) showed distinct patterns between biomass and coal emissions. These findings provide critical insights into the physicochemical properties of freshly emitted EC-containing aerosols, offering valuable references for atmospheric particle analysis and emission characterization.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Chemical composition and mixing state of elemental carbon-containing particles from solid fuel combustion

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年5月27日

查看全文
  • Yajing Kong,
  • Qiyuan Wang,
  • Li Li,
  • Yang Zhang,
  • Jie Tian,
  • Nan Ma,
  • Yaqing Zhou,
  • Huikun Liu,
  • Jiawen Liu,
  • Weikang Ran,
  • Jiarui Liu,
  • Chongshu Zhu,
  • Yongming Han,
  • Junji Cao

摘要

Elemental carbon (EC), predominantly produced by solid fuel combustion, significantly influences both climate and public health. However, the physicochemical properties of EC-containing particles immediately after emission remain inadequately understood. This study investigates the chemical composition, size distribution, and mixing state of EC-containing particles from five solid fuels: wheat, corn, rice straw, bituminous coal, and anthracite. Using a single-particle aerosol mass spectrometer (SPAMS), we identified seven distinct EC-containing particle types. Our results show that biomass burning primarily produces EC-containing particles obviously coated with organic carbon (EC-OC) and organic nitrogen (EC-CN), with sizes concentrated between 0.4 and 1.0 μm. In contrast, bituminous coal emissions are dominated by sodium-rich EC-containing particles (EC-Na), while anthracite combustion predominantly produces particles coated with sulfate or nitrate (EC-NS). Bituminous coal particles are generally smaller ( < 0.4 μm), likely due to higher volatile content and rapid pyrolysis. The mixing states of EC-containing particles varied markedly. Sulfate (97HSO4−) was strongly associated with EC-OC and EC-Na particles, resulting in a highly mixing state. Levoglucosan (59C2H3O2−) showed distinct patterns between biomass and coal emissions. These findings provide critical insights into the physicochemical properties of freshly emitted EC-containing aerosols, offering valuable references for atmospheric particle analysis and emission characterization.