Yao Chuxin, Tang Jiao, Zhong Guangcai, Ma Huimin, Mo Yangzhi, Geng Xiaofei, Yi Xin, Zhang Qianyu, Li Jun, Zhao Shizhen, Zhang Gan
State Key Laboratory of Advanced Environmental Technology, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China.
Guangdong-Hong Kong-Macao JointLaboratory for Environmental Pollution and Control and Guangdong Provincial Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou, 510640, China.
Environ Health (Wash). 2025 Apr 16;3(7):768-776. doi: 10.1021/envhealth.4c00267. eCollection 2025 Jul 18.
Organic compounds are important contributors to the optical properties and health effects of combustion-derived particles. However, the connection between optical properties and toxicity of combustion particles remains a matter of little concern. In this study, combustion particles were collected from 11 primary sources, including biomass burning, coal combustion, and vehicle exhaust. The extractable organic matter (EOM) in bituminous coal combustion particles shows the highest light-absorption, fluorescence properties, and toxicity among samples. Parallel factor (PARAFAC) analysis combined excitation-emission matrix (EEM) spectroscopy resolved 4 types of basic chromophore components in EOM. Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) analysis further resolved ∼800 molecules, predominantly aromatics (84% ± 4.6%), which showed positive correlations with the light-absorption, fluorescence properties and toxicity of EOM ( < 0.05). Aromatics are inferred to be the intrinsic link between the optical properties and toxicity of EOM in combustion particles. Additionally, the benzene poly-(carboxylic acid)-s (BPCAs) method, which could identify and quantify fused benzene rings in EOM, further indicates the high condensation degree of aromatics is closely correlated with the light-absorption, fluorescence properties of EOM. However, the toxicity of EOM may depend on the bay or fjord region of aromatics. These findings provide valuable insights into the light-absorption, fluorescence properties and toxicity of EOM in combustion particles.
有机化合物是燃烧产生的颗粒物光学性质和健康影响的重要贡献者。然而，燃烧颗粒物的光学性质与毒性之间的联系仍然很少受到关注。在本研究中，从11个主要来源收集了燃烧颗粒物，包括生物质燃烧、煤炭燃烧和汽车尾气。烟煤燃烧颗粒物中的可提取有机物（EOM）在样品中表现出最高的光吸收、荧光特性和毒性。平行因子（PARAFAC）分析结合激发-发射矩阵（EEM）光谱解析了EOM中的4种基本发色团成分。傅里叶变换离子回旋共振质谱（FT-ICR MS）分析进一步解析了约800种分子，主要是芳烃（84%±4.6%），其与EOM的光吸收、荧光特性和毒性呈正相关（<0.05）。推断芳烃是燃烧颗粒物中EOM光学性质与毒性之间的内在联系。此外，可识别和量化EOM中稠合苯环的苯多（羧酸）-s（BPCAs）方法进一步表明，芳烃的高缩合度与EOM的光吸收、荧光特性密切相关。然而，EOM的毒性可能取决于芳烃的湾区或峡湾区。这些发现为燃烧颗粒物中EOM的光吸收、荧光特性和毒性提供了有价值的见解。
