Size Distributions of Trace Metals in Atmospheric Aerosols in the United Kingdom

Andrew Allen, E Nemitz, Ji Shi, Roy Harrison, JC Greenwood

    Research output: Contribution to journalArticle

    316 Citations (Scopus)

    Abstract

    The size distributions of Ba, Cd, Co, Cu, Hg, Mn, Ni, Pb, Sn, Se, Sr, Zn and Fe in atmospheric aerosols were measured using impactors at three background sites in central England and southern Scotland. Coarse aerosols ( > 10.0 mum) were found to be undercollected by a micro- orifice uniform deposit impactor (MOUDI) when compared to an isokinetic technique, to a degree dependent on the size distribution of individual metals. The size distributions obtained in Scotland, which were typically trimodal, differed from those in central England, where modes were more variable. Characteristic size distributions allowed identification of three main behavioural types: (i) metals whose mass resided mainly within the accumulation mode (Cd, Sn, Pb, Se), (ii) those which were distributed between fine, intermediate and coarse modes (Ni, Zn, Cu, Co, Mn, Hg), and (iii) those which were mainly found within coarse particles (Fe, Sr, Ba). The measured distributions are believed to result from a combination of processes including local anthropogenic and natural sources, long-range transport and resuspension. (C) 2001 Elsevier Science Ltd. All rights reserved.
    Original languageEnglish
    Pages (from-to)4581-4591
    Number of pages11
    JournalAtmospheric Environment
    Volume35
    Issue number27
    DOIs
    Publication statusPublished - 1 Sep 2001

    Keywords

    • PM10
    • aerosols
    • PM2.5
    • trace metals
    • size distributions

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