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The effects of particle-induced oxidative damage from exposure to airborne fine particulate matter components in the vicinity of landfill sites on Hong Kong

Lui, KH, Jones, Tim P, Berube, Kelly, Sai Hang Ho, Steven, Yim, SHL, Cao, Jun-Ji, Lee, SC, Tian, Linwei, Wi Min, Dae and Ho, KF 2019. The effects of particle-induced oxidative damage from exposure to airborne fine particulate matter components in the vicinity of landfill sites on Hong Kong. Chemosphere 230 , pp. 578-586. 10.1016/j.chemosphere.2019.05.079
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Abstract

The physical, chemical and bioreactivity characteristics of fine particulate matter (PM2.5) collected near (<1 km) two landfill sites and downwind urban sites were investigated. The PM2.5 concentrations were significantly higher in winter than summer. Diurnal variations of PM2.5 were recorded at both landfill sites. Soot aggregate particles were identified near the landfill sites, which indicated that combustion pollution due to landfill activities was a significant source. High correlation coefficients (r) implied several inorganic elements and water-soluble inorganic ions (vanadium (V), copper (Cu), chloride (Cl−), nitrate (NO3−), sodium (Na) and potassium (K)) were positively associated with wind flow from the landfill sites. Nevertheless, no significant correlations were also identified between these components against DNA damage. Significant associations were observed between DNA damage and some heavy metals such as cadmium (Cd) and lead (Pb), and total Polycyclic Aromatic Hydrocarbons (PAHs) during the summer. The insignificant associations of DNA damage under increased wind frequency from landfills suggested that the PM2.5 loading from sources such as regional sources was possibly an important contributing factor for DNA damage. This outcome warrants the further development of effective and source-specific landfill management regulations for particulate matter production control to the city.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Earth and Ocean Sciences
Biosciences
Publisher: Elsevier
ISSN: 0045-6535
Date of First Compliant Deposit: 17 May 2019
Date of Acceptance: 11 May 2019
Last Modified: 20 Oct 2019 09:13
URI: http://orca.cf.ac.uk/id/eprint/122622

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