Scavenging of atmospheric trace metal pollutants by mineral dusts: Inter-regional transport of Australian trace metal pollution to New Zealand.

Samuel Marx, B.S. Kamber and McGowan, Hamish A. (2008) Scavenging of atmospheric trace metal pollutants by mineral dusts: Inter-regional transport of Australian trace metal pollution to New Zealand.. Atmospheric Environment, 42 10: 2460-2478. doi:10.1016/j.atmosenv.2007.12.014


Author Samuel Marx
B.S. Kamber
McGowan, Hamish A.
Title Scavenging of atmospheric trace metal pollutants by mineral dusts: Inter-regional transport of Australian trace metal pollution to New Zealand.
Journal name Atmospheric Environment   Check publisher's open access policy
ISSN 1352-2310
Publication date 2008-01-01
Sub-type Article (original research)
DOI 10.1016/j.atmosenv.2007.12.014
Open Access Status
Volume 42
Issue 10
Start page 2460
End page 2478
Total pages 19
Editor P. Brimblecombe
C. K. Chan
H. B. Singh
Place of publication United Kingdom
Publisher Pergamon
Language eng
Subject C1
040199 Atmospheric Sciences not elsewhere classified
040203 Isotope Geochemistry
039901 Environmental Chemistry (incl. Atmospheric Chemistry)
040101 Atmospheric Aerosols
920405 Environmental Health
960199 Air Quality not elsewhere classified
Abstract Dust samples collected from the surface of glaciers and in dust traps on the remote West Coast of New Zealand's South Island can reliably be identified as being of both Australian and New Zealand origin. Most are, however, found to be enriched in Cu, Zn, Cd, Sb, Sn, Pb, Ni and Cr, when compared with their source-area sediments. The degree of metal enrichment in the dust samples is proportionally related to the percentage of Australian dust implying that the pollutants were transported with dust from eastern Australia. Pollution enrichment factors for these metals in dusts were calculated with a high degree of certainty, because the specific source regions of the dust could be identified. Rates of trace metal pollution transport were then calculated using a record of Australian dust transport over New Zealand. Results show that significant concentrations of trace metal pollutants are transported to New Zealand at levels that are between 1.5 and 100 times background conditions. Results also show that Sb, Pb and Cr are highly particle reactive and their transport in this region is almost exclusively associated with dust scavenging (up-take of pollutants by dust). By comparison, Cu, Zn, Cd, Sn and Ni may also be transported independently of dust. While the rates of pollution metal transport reported here are lower than in more industrialised regions of the globe, the majority of these metals are being deposited in a region internationally recognised for its environmental and conservation values.
Keyword Atmospheric scavenging
Australia
Dust
Lake Eyre Basin
New Zealand
Trace metal pollution
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
School of Geography, Planning and Environmental Management Publications
 
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Created: Mon, 30 Mar 2009, 19:37:34 EST by Helen Smith on behalf of School of Geography, Planning & Env Management