Physicochemical characterization of brake abrasion particles from trucks under laboratory conditions

Abstract

The study of non-exhaust particle emissions is crucial in the context of the global vehicle fleet’s electrification. These particles, often overlooked, have harmful impacts on the environment and human health. This paper presents an exhaustive characterization of particles emitted from heavy-duty truck brake wear under controlled conditions. Braking tests were analyzed by correlating braking conditions with particle concentration collected by an Electrical Low Pressure Impactor (ELPI + ). The chemical composition was determined using Scanning Electron Microscopy and Energy Dispersive X-ray Spectroscopy (SEM-EDX). Results show that ultrafine particles (<100 nm) dominate emissions, with brake wear tracers such as Fe, Cu, Mo identified. The study also reveals that brake disc temperature significantly influences emissions. This work aims to enhance understanding of non-exhaust particulate emissions from heavy-duty vehicles, contributing to the development of effective particle collection systems and raising awareness of their environmental and health effects.