Concentrations of heavy metals in urban soils of Talcahuano (Chile): a preliminary study |
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Authors: | Pedro Tume Jaume Bech Bernardo Sepulveda Luis Tume Joan Bech |
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Institution: | (1) Engineering Faculty, Universidad Católica de la Santísima Concepción, P.O. Box 297, Concepción, Chile;(2) Chair of Soil Science, University of Barcelona, Barcelona, Spain;(3) Sciences Faculty, Universidad Nacional de Piura, Piura, Perú;(4) Department of Sciences, Pontificia Universidad Católica del Perú, Lima, Perú;(5) Department of Astronomy and Meteorology, University of Barcelona, Barcelona, Spain |
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Abstract: | Concentrations of Cd, Cr, Ni, Pb, and Zn in the top-(0–10 cm) and sub-surface (10–20 cm) soils of the Talcahuano urban area
were measured. The main soil properties (organic matter, CaCO3, pH, particle sizes) were determined for a network of representative sampling sites. The mean Cr, Ni, Pb, and Zn contents
in the urban topsoil samples from Talcahuano (37.8, 22.6, 35.2, 333 mg kg−1, respectively) were compared with mean concentrations for other cities around the world. The results revealed higher concentrations
of heavy metals in topsoil samples than in sub-surface samples. The samples from IS1, IS2, and IS3, located in the Talcahuano
industrial park, had higher Cr, Ni, Pb, and Zn contents than did samples from the other sites. This was probably due to local
pollution by industrial (metallurgical) dust, although other diffuse pollution throughout the entire port region (shipyards,
metallurgy, the dismantling of old ships), and contributions from the wind from adjacent industrial, storage, and vessel areas
clearly played a role. Heavy metals were lowest in the sample taken on school grounds (SG). |
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Keywords: | Urban soils Heavy metals Soil contamination Talcahuano Chile |
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