Detailed Physicochemical Characterization of the Ambient Fine and Ultrafine Particulate Mixture at a Construction Site

Firdevs Ilçi, Mengfan Li, Jeremy Gernand

Research output: Contribution to journalArticlepeer-review

Abstract

This paper presents a detailed characterization of the size and shape distributions, and chemical compositions of ambient fine and ultrafine particles collected at the site of a building demolition and construction project at the Pennsylvania State University. Particle samples were collected with a nine-stage cascade impactor, characterized via transmission electron microscopy and energy dispersive spectroscopy for elemental compositions, and images analyzed for morphological features. 89.3% of the particles collected by count were ultrafine particles or aggregates of ultrafine particles that disaggregated during the collection process. The mean particulate matter mass and count concentrations were 167.2 µg/m3 and 16,232 particles/cm3, respectively. 72.2% of the particles by count were morphologically circular on two-dimensional images and 74.0% of the particles by count had an aspect ratio of between 1:1 and 2:1. The five most prevalent elements found in the samples were carbon, oxygen, silicon, sulfur, and calcium, with corresponding mass fractions of 40.8%, 26.4%, 7.6%, 5.1%, and 4.7%. Based on the current regulatory occupational exposure limits, the particulate matter at the construction site was within permissible concentrations. These results enable a comparison of a real-world particulate exposure environment to hazard levels determined through single-particle-type exposure studies.

Original languageEnglish (US)
Pages (from-to)344-356
Number of pages13
JournalAerosol Science and Engineering
Volume5
Issue number3
DOIs
StatePublished - Sep 2021

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Materials Science(all)
  • Pollution

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