Road dust has been identified as one of the main sources of outdoor PM₁₀ in Bogota (a Latin American megacity), but there are no studies that have analyzed the physicochemical characteristics and origins of its respirable fraction. A characterization of inorganic compounds (water soluble ions, major and trace elements, organic and elemental carbon) and an analysis of source contributions to the PM₁₀ fraction of road dust were carried out in this study. A total of twenty road dust samples, selected from representative industrial, residential and commercial areas, were swept and resuspended to obtain the thoracic fraction. Size distribution by laser diffraction and individual particle morphology by Scanning Electron Microscopy were also evaluated. The data obtained revealed that the volume (%) of thoracic particles was higher in samples from industrial zones where heavy vehicular traffic, industrial emissions and deteriorated pavements predominated. Crustal elements were the most abundant species, accounting for 49–62% of the thoracic mass, followed by OC (13–29%), water-soluble ions (1.4–3.8%), EC (0.8–1.9%) and trace elements (0.2–0.5%). The Coefficient of Divergence was obtained to identify the spatial variability of the samples. A source apportionment analysis was carried out considering the variability of chemical profiles, enrichment factors and ratios of Fe/Al, K/Al, Ca/Al, Ti/Al, Cu/Sb, Zn/Sb, OC/TC and OC/EC. By means of a PCA analysis, five components were identified, including local soils and pavement erosion (63%), construction and demolition activities (13%), industrial emissions (6%), brake wear (5%) and tailpipe emissions (4%). These components accounted for 91% of the total variance. The results provide data to understand better one of the main sources of PM₁₀ emissions in Bogota, such as road dust. These data will be useful to optimize environmental policies, and they may be used in future studies of human health and air quality modeling.

在波哥大（拉丁美洲的一个大城市），道路灰尘已被确定为室外PM ₁₀的主要来源之一，但尚无研究分析其可吸入部分的理化特性和来源。无机化合物（水溶性离子，主要和微量元素，有机和元素碳）的表征以及对PM ₁₀的源贡献分析在这项研究中进行了小部分的道路扬尘。总共从代表的工业，住宅和商业区域中选择了二十种道路扬尘样品，并将其重悬以获得胸腔馏分。还评估了通过激光衍射的尺寸分布和通过扫描电子显微镜的单个颗粒形态。所获得的数据表明，在以车辆繁忙，工业排放物和人行道恶化为主的工业区，样品中胸腔颗粒的含量（％）较高。地壳元素是最丰富的物种，占胸质量的49-62％，其次是OC（13-29％），水溶性离子（1.4-3.8％），EC（0.8-1.9％）和微量元素（0.2–0.5％）。获得散度系数以识别样品的空间变异性。考虑化学分布，富集因子和Fe / Al，K / Al，Ca / Al，Ti / Al，Cu / Sb，Zn / Sb，OC / TC和OC / EC之比的变异性进行了源分配分析。通过PCA分析，确定了五个部分，包括当地的土壤和路面侵蚀（63％），建筑和拆除活动（13％），工业排放（6％），制动磨损（5％）和排气管排放（4） ％）。这些组成部分占总差异的91％。结果为更好地了解PM的主要来源之一提供了数据 建筑和拆除活动（13％），工业排放物（6％），制动器磨损（5％）和排气管排放物（4％）。这些组成部分占总差异的91％。结果为更好地了解PM的主要来源之一提供了数据 建筑和拆除活动（13％），工业排放物（6％），制动器磨损（5％）和排气管排放物（4％）。这些组成部分占总差异的91％。结果为更好地了解PM的主要来源之一提供了数据波哥大有_10种排放物，例如道路扬尘。这些数据将有助于优化环境政策，并且可用于未来人类健康和空气质量模型的研究。