from the conferences organized by TANGER Ltd.
Exposure to particulate air pollution has been associated with a variety of health problems. One of the main sources of metal-rich airborne particulate pollution in roadside environments are brake-wear emissions. The scanning electron microscopy (SEM) and transmission electron microscopy (TEM), Mössbauer spectroscopy (MS), X-ray powder diffraction (XRD) was used to a make quantitative evaluation of wear particles in two samples. Sizes, morphologies, oxidation state, and trace element compositions of wear particles were investigated using combination of several methods revealed high concentrations of Fe species and phases, often associated with carbonaceous material. SEM and TEM observations show that brake wear particles with a size of tens to hundreds of nm mainly form particle agglomerates. However, ultrafine (<100 nm) particles are likely to pose a health threat after inhalation and/or ingestion.
Keywords: Wear particles, analysis, TEM, iron oxides, metallic particles© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.