Alexandrino Katiuska, Sánchez Nazly E, Zalakeviciute Rasa, Acuña Wilber, Viteri Fausto
Grupo de Biodiversidad Medio Ambiente y Salud (BIOMAS), Universidad de Las Américas, Vía a Nayón, Quito 170124, Ecuador.
Departamento de Ingeniería Ambiental y Sanitaria, Universidad del Cauca, Popayan 190007, Colombia.
Plants (Basel). 2022 Jul 27;11(15):1948. doi: 10.3390/plants11151948.
needles were collected in urban areas of the city of Quito, Ecuador, to analyze the relationship between the concentration of polycyclic aromatic hydrocarbons (PAHs) with different emission sources and road characteristics. The PAHs were analyzed by high-performance liquid chromatography (HPLC) and included naphthalene (Naph), benzo[]anthracene (BaA), chrysene (Chry), and benzo[]pyrene (BaP), which are related to the sources considered in this work. The results indicated that some streets with moderate and low traffic intensity had higher total concentrations of PAHs than streets with high traffic intensity, showing the importance of non-traffic related emission sources and road characteristics on PAH emissions. All the studied PAHs were associated with traffic emissions, although Naph and BaP were more associated with acceleration and braking activities, while BaA and Chry also seemed to come from restaurant emissions. The presence of gas stations was also important in the emission of PAHs. Road capacity seems to have a higher effect on pollutant emission than road gradient and urban forms. The outcomes of this study are expected to facilitate the diagnostics of the concentration of PAHs in urban areas, which contribute to the design of strategies for the mitigation of pollution by PAHs in urban environment.
在厄瓜多尔基多市的市区收集了针状物，以分析多环芳烃（PAHs）浓度与不同排放源及道路特征之间的关系。通过高效液相色谱法（HPLC）分析了PAHs，其中包括萘（Naph）、苯并[a]蒽（BaA）、屈（Chry）和苯并[a]芘（BaP），这些与本研究中考虑的排放源相关。结果表明，一些交通强度中等和较低的街道PAHs总浓度高于交通强度高的街道，这表明与交通无关的排放源和道路特征对PAH排放的重要性。所有研究的PAHs都与交通排放有关，尽管萘和苯并[a]芘与加速和制动活动的关联更大，而苯并[a]蒽和屈似乎也来自餐馆排放。加油站的存在对PAHs排放也很重要。道路容量似乎比道路坡度和城市形态对污染物排放的影响更大。预计本研究结果将有助于诊断城市地区PAHs的浓度，这有助于设计减轻城市环境中PAHs污染的策略。
