The research intended to find the atmospheric concentrations, sources, and health risks of 16 particle-phase polycyclic aromatic hydrocarbons (PAHs) at the Indo Gangetic Plain (IGP) outflow location for the first time. A total of thirty-six samples of total suspended particulate (TSP) matters were collected with a low volume sampler on quartz filters. PAHs were extracted from filters with dichloromethane (DCM) while purification processes were conducted using solid-phase extraction (SPE) and concentrations of PAHs were determined by gas chromatography coupled with mass spectrometry (GC-MS). The summation of the yearly average values for the total PAHs concentrations was 58.8 ng m^-3; meanwhile, the highest concentration for the total PAHs was obtained during winter (81.26 ng m^-3), whereas the lowest was on monsoon (15.52 ng m^-3) illustrates strong seasonal variations. The effect of transboundary pollution was significant during the winter season. Moreover, the five rings PAHs contributed significantly (54.0%) compared to others. In addition, diagnostic ratio analysis preliminary pointed out that most of the PAHs were emitted from fuel oil and biomass combustion. Furthermore, the PMF model revealed that the sources of PAHs were gasoline exhaust (25%), diesel engine combustion (30%), natural gas emission (23%), and biomass burning (22%). The Bnz(a)Peq factor of individual PAHs varies between 8.0×10^-4 ng m^-3 [Phenanthrene] and 5.70 ng m^-3 [Benzo(a)pyrene] with a summation of 13.34 ng m^-3 for total. The cancer risk of total PAHs was 11.6 times higher than the European Union (EU) guideline value.

该研究旨在首次发现印度恒河平原（IGP）流出位置的16种颗粒相多环芳烃（PAH）的大气浓度，来源和健康风险。用小体积采样器在石英过滤器上收集了总共36个总悬浮颗粒物（TSP）样品。用二氯甲烷（DCM）从过滤器中提取多环芳烃，同时使用固相萃取（SPE）进行纯化过程，并通过气相色谱-质谱联用（GC-MS）测定多环芳烃的浓度。PAHs总浓度的年平均值的总和为58.8 ng m ^-3 ; 同时，冬季总PAHs浓度最高（81.26 ng m ^-3），而最低的是季风（15.52 ng m ^-3），表明强烈的季节性变化。在冬季，跨界污染的影响很大。此外，与其他五环相比，PAH的贡献显着（54.0％）。此外，诊断比率分析初步指出，大多数PAHs是从燃油和生物质燃烧中排放的。此外，PMF模型显示多环芳烃的来源是汽油尾气（25％），柴油机燃烧（30％），天然气排放（23％）和生物质燃烧（22％）。各个PAH的Bnz（a）Peq因子在8.0×10 ^-4 ng m ^-3 [菲]和5.70 ng m ^-3 [Benzo（a）py]之间变化，总和为13.34 ng m ^-3总计。总PAHs的癌症风险比欧盟（EU）准则值高11.6倍。