Size distributions of trace metals in atmospheric aerosols in the United Kingdom
Size distributions of trace metals in atmospheric aerosols in the United Kingdom
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DOI：
10.1016/s1352-2310(01)00190-x
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发表时间：
2001-09-01
影响因子：
5
通讯作者：
Greenwood, JC
中科院分区：
文献类型：
--
作者：
Allen, AG;Nemitz, E;Greenwood, JC
在英格兰中部和苏格兰南部的三个背景下，用撞击器测量了大气气溶胶中Ba、Cd、Co、Cu、Hg、Mn、Ni、Pb、Sn、Se、Sr、Zn和Fe的粒度分布。与等速技术相比，微孔均匀沉积撞击器(Moudi)对粗大气溶胶(>；10.0um)的收集不足，其程度取决于单个金属的尺寸分布。在苏格兰获得的粒度分布与英格兰中部的不同，后者的模式更具多样性。特征的粒度分布允许识别三种主要的行为类型：(I)质量主要位于聚集模式中的金属(Cd、Sn、Pb、Se)，(Ii)分布在细、中、粗模式之间的金属(Ni、Zn、Cu、Co、Mn、Hg)，以及(Iii)主要存在于粗颗粒中的金属(Fe、Sr、Ba)。测量到的分布被认为是一系列过程的结果，包括当地的人为和自然来源、长距离输送和再悬浮。(C)2001爱思唯尔科学有限公司。保留所有权利。
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.