Assessment of heavy metal pollution in urban topsoils from the metropolitan area of Mexico City

This study reports the degree of heavy metal pollution (Cr, Cu, Ni, Pb, Zn and V) in 135 urban topsoil samples from the metropolitan area of Mexico City. Pollution indices (PI) were calculated to identify the metal accumulation with respect to the background values. The levels of heavy metals in the...

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Veröffentlicht in:	Journal of geochemical exploration 2009-06, Vol.101 (3), p.218-224
Hauptverfasser:	Morton-Bermea, O., Hernández-Álvarez, E., González-Hernández, G., Romero, F., Lozano, R., Beramendi-Orosco, L.E.
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Sprache:	eng
Schlagworte:	Heavy metals Mexico Pollution index Urban contamination Urban topsoils
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container_title	Journal of geochemical exploration
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creator	Morton-Bermea, O. Hernández-Álvarez, E. González-Hernández, G. Romero, F. Lozano, R. Beramendi-Orosco, L.E.
description	This study reports the degree of heavy metal pollution (Cr, Cu, Ni, Pb, Zn and V) in 135 urban topsoil samples from the metropolitan area of Mexico City. Pollution indices (PI) were calculated to identify the metal accumulation with respect to the background values. The levels of heavy metals in the analyzed samples show a wide range of variation. Lead, Zn and Cu are the elements most enriched in the analyzed area, presenting pollution indexes of up to 23.8, 21.6 and 12.4, respectively. Geochemical maps were produced to assess the spatial distribution of pollution index. It is concluded that emissions from vehicles may be the major source of Pb urban contamination; furthermore, other small or large factories are possible sources for soil pollution (Cu, Zn). The concentration of Cr, Ni, and V in most of the analyzed samples do not appear to reach pollution levels. The assessment of the soil environmental quality in the metropolitan area Mexico City in terms of PI can be used as the basis for a regular monitoring program for implementing suitable pollution control measures.
doi_str_mv	10.1016/j.gexplo.2008.07.002
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subjects	Heavy metals Mexico Pollution index Urban contamination Urban topsoils
title	Assessment of heavy metal pollution in urban topsoils from the metropolitan area of Mexico City
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