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Impact of particulate matter and heavy metals emissions from automotive painting booths on ambient air quality

2026Open accessOsun State University

In plain language

Automotive painting operations release substantial amounts of airborne particulate matter and heavy metals into the surrounding environment. An evaluation across twenty-two sampling sites demonstrated that concentrations of fine particles, coarse particles, and total suspended particulates consistently exceeded regulatory safety thresholds. Heavy metal analysis identified zinc at the highest concentrations, whilst more toxic elements such as cadmium were present at lower levels. Atmospheric dispersion modelling confirmed that these elevated pollutant levels compromise ambient air quality, creating serious health hazards for both workshop painters and nearby communities. To mitigate these environmental and occupational risks, stricter enforcement of safety standards is necessary alongside technical interventions. Integrating dust removal equipment, specifically electrostatic precipitators, directly into paint spraying machines provides a practical engineering measure to capture harmful emissions at the source before they disperse.

Key takeaways

  • Particulate matter concentrations across all twenty-two automotive painting sites exceeded standard regulatory limits.
  • Zinc occurred at the highest concentrations among detected heavy metals, whereas the more toxic cadmium appeared in lower amounts.
  • Paint emissions spread into surrounding areas, posing health risks to both workshop staff and neighbouring residents.
  • Integrating electrostatic precipitators into paint spraying machines can help capture toxic particulates at the source.

Why it matters

Automotive spray painting releases hazardous dust and toxic heavy metals that travel beyond workshop walls into neighbouring areas. Because recorded pollution levels significantly exceed safety guidelines, these emissions threaten the health of both workers and local residents. Highlighting the scale of this exposure underscores the urgent need for enforced occupational safety standards and better air filtration systems in urban workshops.

Commercialisation angle

This research points towards equipment manufacturing opportunities, specifically the integration of electrostatic precipitators and dust removal systems directly into commercial paint spraying machinery. The primary users would be automotive body shops, industrial paint booths, and machinery manufacturers seeking compliance with environmental safety laws. Because the abstract only models impacts and suggests this intervention conceptually, the technology pathway remains at an early engineering stage requiring prototype development and testing.

AI-generated from the published abstract. Always read the original work before citing.

Abstract

This study investigated the particulate and heavy metal emissions arising from automotive paint applications. A total of 22 sampling locations, represented as AQ1 - AQ22 for this study. Concentrations of particulate matters were determined using Aerocet 831 particle counter while X-ray Fluorescence (XRF) was used to analyze the presence of heavy metals according to standard procedures. The results were also compared with the standard regulatory permissible limits. American Environmental Regulatory Model (AERMOD dispersion model) was used to simulate the air quality impacts. The results showed the concentrations of PM 2.5 ranging from 17.76 to 1093.46 μg/m 3 , PM 10 from 308.49 to 21932.79 μg/m 3 , and TSP from 357.49 to 23618.95 μg/m 3 . Among the sample locations, AQ1 recorded the highest concentration of particulate matter, while AQ7 had the lowest. Also, the study showed that although zinc exhibited the highest concentration, it is the least toxic of the heavy metals, while cadmium, which is the most toxic heavy metal, was found in lower concentrations. All the measured particulate matter levels at each sampling location as well as the concentrations of the heavy metals exceeded regulatory standards, which pose health risks, not only to the painters but also to the individuals in the neighborhood. Implementation and enforcement of occupational health and safety regulations should also be given greater attention. Incorporation of paint dust removal such as electrostatic precipitator into the spraying machine was suggested.

Research topics

  • Air Quality and Health Impacts
  • Indoor Air Quality and Microbial Exposure
  • Occupational exposure and asthma

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DOI: 10.1016/j.nxcen.2026.100095

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