| Detecting atmospheric pollution in surface soils using magnetic measurements: a reappraisal using an England and Wales database. | |
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MedLine Citation:
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PMID: 19586697 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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Industrial activity such as burning of fossil fuels produces magnetically enhanced particulates. These particulates consist of coarse-grained multidomain and stable single domain magnetic minerals. Two threshold values of low field magnetic susceptibility (chi(LF)) and frequency dependent susceptibility percentage (chi(FD)%) discriminate ferrimagnetic minerals of these sizes and can act as a tracer of magnetic pollution. Application of the thresholds to a magnetic topsoil data set (n=5656 across England and Wales) revealed 637 samples potentially dominated by pollution particulates. The magnetic parameters of these samples display a negative correlation with distance to urban areas and positive correlations with metals associated with anthropogenic activity (Cu, Pb, and Zn). Results of experimentation with threshold values and modelling of magnetic anomalies suggest that regional factors such as geology and potential for pedogenic secondary magnetic enhancement should be considered when setting threshold values. |
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Authors:
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A Blundell; J A Hannam; J A Dearing; J F Boyle |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2009-07-07 |
Journal Detail:
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Title: Environmental pollution (Barking, Essex : 1987) Volume: 157 ISSN: 1873-6424 ISO Abbreviation: Environ. Pollut. Publication Date: 2009 Oct |
Date Detail:
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Created Date: 2009-08-07 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8804476 Medline TA: Environ Pollut Country: England |
Other Details:
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Languages: eng Pagination: 2878-90 Citation Subset: IM |
Affiliation:
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Department of Geography, University of Liverpool, Liverpool L69 7ZT, UK. A.Blundell@leeds.ac.uk |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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