Polycyclic aromatic hydrocarbons (PAHs) associated with atmospheric particles represent a significant risk to human health. This issue is even more relevant in environments where biomass combustion processes are considered as the major potential emission sources, such as the rural ecosystem. This study aimed to assess the levels of PM₁₀-bound PAHs in several rural locations, their distribution along a year and how weather variables could influence them. Also, we focused on the emission sources and the comparison of the PAH mixtures to assess similitude among the sampling points. PM₁₀-bound PAHs levels were monitored at three rural locations (north, center, and south) of Spain between April 2017 and February 2018. The study revealed that there were substantial differences regarding the levels of ΣPAHs, being higher in the central zone (IS; 65.4 mg/m³), then in the south (VA; 35.8 ng/m³) and finally in the north (NA; 20.9 ng/m³). IS and VA showed a similar distribution of emission sources, and temperature and wind speed seemed to influence negatively over the levels of PAHs likely. At both locations, PAH levels ran parallel throughout the year, with maximum levels during cold seasons and a greater presence of high molecular weight PAHs; however, the levels of PAHs and the most representative PAHs differed. On the other hand, NA was characterized for having another distribution of emission sources, which determined other representative PAHs, higher levels during spring, and a similar presence of high/medium/low molecular weight. Finally, the levels of ambient air PAHs represented an acceptable risk to people.

与大气颗粒物相关的多环芳烃 (PAH) 对人类健康构成重大风险。这个问题在生物质燃烧过程被视为主要潜在排放源的环境中更为相关，例如农村生态系统。本研究旨在评估几个农村地区 PM ₁₀结合的PAHs 的水平、它们在一年中的分布以及天气变量如何影响它们。此外，我们关注排放源和 PAH 混合物的比较，以评估采样点之间的相似性。下午_10点2017 年 4 月至 2018 年 2 月期间，在西班牙的三个农村地区（北部、中部和南部）监测了约束性 PAHs 水平。研究表明，ΣPAHs 水平存在显着差异，中部地区（IS； 65.4 mg/m ³），然后是南部（VA；35.8 ng/m ³），最后是北部（NA；20.9 ng/m ^{3 ）}）。IS 和 VA 显示出相似的排放源分布，温度和风速似乎对 PAHs 的水平可能产生负面影响。在这两个地方，PAH 水平全年平行，在寒冷季节达到最高水平，高分子量 PAH 含量更高；但是，PAHs 的含量和最具代表性的 PAHs 含量不同。另一方面，NA 的特征在于具有另一种排放源分布，这决定了其他具有代表性的 PAH、春季期间的较高水平以及类似的高/中/低分子量存在。最后，环境空气多环芳烃的水平对人们来说是可以接受的风险。