Metal Contamination in Urban Soils of Coastal Tuscany (Italy) |
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Authors: | Francesca Bretzel Marco Calderisi |
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Institution: | (1) Department of Soil Chemistry, CNR Institute for Ecosystem Study, via Moruzzi 1, 56124 Pisa, Italy |
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Abstract: | Urban soils are often contaminated by metals deriving from human activities. Urban polluted soils can affect human health
through direct physical contact or through the food chain. The behaviour of metals is affected by chemical and physical soil
properties. Heavy metal concentration was determined in some soils of three medium sized towns of coastal Tuscany, Central
Italy. Soil samples were collected in roadsides, urban agricultural soils (allotments), playgrounds and public parks. The
analysis included total metal content (Pb, Cu, Zn, Ni, Cd), and sequential extraction. Lead reached the highest levels in
the soils and was higher near roads. In urban agricultural soils and in allotments Cu was present in noticeable quantities
(300 mg kg−1). The presence of Cu in urban soils seems to be typical of soils used for a long period as agricultural land, especially
vineyards in the area covered by this study. Sequential extraction was performed to evaluate the mobility of the metals and
to better understand the impact of the anthropogenic activity on urban sites. In the present study principal components analysis
(PCA) is employed to describe the characteristics of urban soils. |
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Keywords: | DTPA extraction lead metals principal components analysis (PCA) urban soils zinc |
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