In this study, PM_2.5-bound carbonaceous compounds, including organic carbon (OC), elemental carbon (EC), water-soluble ionic species (WSIS), and polycyclic aromatic hydrocarbons (PAHs) in the ambient air of Bangkok were analysed. The mean PM_2.5 concentration was 77.0 ± 21.2 μg m⁻³, while the average concentrations of OC, and EC were 8.03 ± 4.02, and 2.62 ± 1.49 μg m⁻³, respectively. The relatively high OC/EC ratio (3.52 ± 1.41) coupled with a strong positive correlation between K⁺ and carbonaceous compounds (K⁺ vs. OC (r = 0.86), K⁺ vs. EC (r = 0.87), K⁺ vs. Char-EC (r = 0.82)) suggest that biomass burning are one of the major contributors to PM_2.5 in the sampling area. A comparatively high abundance of both B[g,h,i]P and Ind guides that vehicular exhausts, industrial combustion, and burning of waste might reflect the sources of these PAHs in Bangkok's atmosphere. Interestingly, hierarchical cluster analysis (HCA) indicated that the main source of PM_2.5 was a mixture of various combustion activities (e.g. biomass burning, vehicular exhaust, fossil fuel, coal, and industrial emissions). Principal Component Analysis (PCA) successfully classified five principal sources of PM_2.5, including vehicular exhaust, biomass burning, sea salt aerosol, power plant, and industrial emissions, which accounted for 43.7%, 24.0%, 10.5%, 6.48%, and 4.46%, respectively. These results indicated that the effects of vehicular exhausts and biomass burning played an important role in governing the PM_2.5 level in ambient air of Bangkok. The findings of this study aid policymakers in launching effective air quality control strategies based on the source apportionment analysis.

在这项研究中，分析了曼谷周围空气中与PM _2.5结合的含碳化合物，包括有机碳（OC），元素碳（EC），水溶性离子物质（WSIS）和多环芳烃（PAH）。PM _2.5的平均浓度为77.0±21.2μgm ^-3，而OC和EC的平均浓度分别为8.03±4.02和2.62±1.49μgm ^-3。耦合具有K之间有很强的正相关性相对高的OC / EC比率（3.52±1.41）⁺和含碳化合物（K ⁺ 与OC（[R  = 0.86），K ⁺ 与EC（[R  = 0.87），K ⁺ VS 。Char-EC（r  = 0.82））表明生物质燃烧是采样区域PM _2.5的主要贡献者之一。B [g，h，i] P和Ind指南的含量相对较高，它们表明车辆废气，工业燃烧和废物燃烧可能反映了曼谷大气中这些PAH的来源。有趣的是，层次聚类分析（HCA）表明，PM _2.5的主要来源是各种燃烧活动的混合（例如，生物质燃烧，车辆废气，化石燃料，煤炭和工业排放）。主成分分析（PCA）成功分类了PM _2.5的五个主要来源包括汽车尾气，生物质燃烧，海盐气溶胶，发电厂和工业排放，分别占43.7％，24.0％，10.5％，6.48％和4.46％。这些结果表明，机动车尾气和生物质燃烧的影响在控制曼谷环境空气中PM _2.5水平方面起着重要作用。这项研究的结果有助于政策制定者根据污染源分配分析，启动有效的空气质量控制策略。