Particulate matter oxidative potential from waste transfer station activity.

TitleParticulate matter oxidative potential from waste transfer station activity.
Publication TypeJournal Article
Year of Publication2010
AuthorsGodri KJ, Duggan ST, Fuller GW, Baker T, Green D, Kelly FJ, Mudway IS
JournalEnviron Health Perspect
Volume118
Issue4
Pagination493-8
Date Published2010 Apr
ISSN1552-9924
KeywordsAntioxidants, Environmental Monitoring, Meteorology, Particulate Matter
Abstract

BACKGROUND: Adverse cardiorespiratory health is associated with exposure to ambient particulate matter (PM). The highest PM concentrations in London occur in proximity to waste transfer stations (WTS), sites that experience high numbers of dust-laden, heavy-duty diesel vehicles transporting industrial and household waste.

OBJECTIVE: Our goal was to quantify the contribution of WTS emissions to ambient PM mass concentrations and oxidative potential.

METHODS: PM with a diameter < 10 microm (PM10) samples were collected daily close to a WTS. PM10 mass concentrations measurements were source apportioned to estimate local versus background sources. PM oxidative potential was assessed using the extent of antioxidant depletion from a respiratory tract lining fluid model. Total trace metal and bioavailable iron concentrations were measured to determine their contribution to PM oxidative potential.

RESULTS: Elevated diurnal PM10 mass concentrations were observed on all days with WTS activity (Monday-Saturday). Variable PM oxidative potential, bioavailable iron, and total metal concentrations were observed on these days. The contribution of WTS emissions to PM at the sampling site, as predicted by microscale wind direction measurements, was correlated with ascorbate (r = 0.80; p = 0.030) and glutathione depletion (r = 0.76; p = 0.046). Increased PM oxidative potential was associated with aluminum, lead, and iron content.

CONCLUSIONS: PM arising from WTS activity has elevated trace metal concentrations and, as a consequence, increased oxidative potential. PM released by WTS activity should be considered a potential health risk to the nearby residential community.

DOI10.1289/ehp.0901303
Alternate JournalEnviron. Health Perspect.
PubMed ID20368130
PubMed Central IDPMC2854725
Grant ListG0801056 / / Medical Research Council / United Kingdom