Publication:
Distinguishing between natural and anthropogenic sources for potentially toxic elements in urban soils of Talcahuano, Chile

cris.sourceIdoai:repositorio.ucsc.cl:25022009/2473
cris.virtual.author-orcidhttps://orcid.org/0000-0002-8616-0771
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cris.virtual.departmentFacultad de Ingeniería
cris.virtual.departmentFacultad de Ingeniería
cris.virtual.departmentFacultad de Ciencias
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cris.virtualsource.author-orcid3ecd9d4d-1971-4ef7-962f-2742b6b1642a
cris.virtualsource.author-orcid13a3d1eb-d859-4e73-927c-bacd01ba9c7b
cris.virtualsource.author-orcidf5b20190-a260-4e15-8588-3648b5c92dd8
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cris.virtualsource.department3ecd9d4d-1971-4ef7-962f-2742b6b1642a
cris.virtualsource.department13a3d1eb-d859-4e73-927c-bacd01ba9c7b
cris.virtualsource.departmentf5b20190-a260-4e15-8588-3648b5c92dd8
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dc.contributor.authorDr. Tume-Zapata, Pedro
dc.contributor.authorMg. González-Sepúlveda, Elizabeth
dc.contributor.authorDr. King-St-Onge, Robert
dc.contributor.authorCuitiño, Lucas
dc.contributor.authorBech, Jaume
dc.contributor.authorRoca, Núria
dc.date.accessioned2020-05-23T22:13:37Z
dc.date.accessioned2023-09-11T14:55:27Z
dc.date.available2020-05-23T22:13:37Z
dc.date.created2020-05-23T22:13:37Z
dc.date.issued2018
dc.description.abstractPurpose: The objectives of this study were (1) to determine the concentrations and background concentrations of Ba, Co, Cr, Mn, and Ni in the urban soils of Talcahuano (Chile); (2) assess the level of contamination in the urban soils based on different pollution indexes; and (3) to identify natural or anthropogenic sources in order to obtain a spatial distribution of the pollutants. Material and methods: A total of 420 samples were collected from the study area as follows: 140 topsoil samples (TS) (0–10 cm), 140 subsoil samples (SS) (10–20 cm), and 140 deep soil samples (DS) (150 cm). The soils were characterized, and the concentrations of Ba, Co, Cr, Mn, and Ni were analyzed by atomic absorption photospectrometry following aqua regia digestion. Correlations and principal component analysis combined with spatial analysis were implemented in order to distinguish the sources and their classification as geogenic or anthropogenic. Several simple and robust statistical methods were applied to datasets in order to explore their potential in the evaluation of a useful and robust background values. The degree of contamination along with the geoaccumulation index, enrichment factor, and contamination factor were also evaluated. Results and discussion: The median concentrations obtained for various elements includes Ba 461 mg kg−1, Co 82.7 mg kg−1, Cr 134 mg kg−1, Mn 311 mg kg−1, and Ni 56.1 mg kg−1. In general, the concentrations of Ba, Co, Cr, Mn, and Ni decrease with depth. Correlations and principal component analysis suggest that Cr, Mn, and Ni are contributed by external sources. The spatial distribution of Cr, Mn, and Ni in TS displays a spatial pattern extending along industrial environments and emission sources. Conclusions: The estimated background values determined with the iterative 2σ-technique includes 536 mg kg−1 for Ba, 95.9 mg kg−1 for Co, 208 mg kg−1 for Cr, 464 mg kg−1 for Mn, and 90.5 mg kg−1 for Ni. The geochemical index, enrichment factor, and the contamination factor register a moderate to considerable contamination in some soil samples.
dc.identifier.doi10.1007/s11368-017-1750-0
dc.identifier.urihttps://repositorio.ucsc.cl/handle/25022009/8546
dc.languageeng
dc.publisherSpringer
dc.subjectAnthropogenic contamination sources
dc.subjectChile
dc.subjectLand use factors
dc.subjectSoil contamination
dc.subjectTalcahuano
dc.subject.ocdeCiencias agrícolas::Agricultura, silvicultura y pesca
dc.subject.ocdeCiencias Naturales::Ciencias de la tierra y medioambientales
dc.subject.ods11
dc.subject.ods13
dc.titleDistinguishing between natural and anthropogenic sources for potentially toxic elements in urban soils of Talcahuano, Chile
dc.typeartículo
dspace.entity.typePublication
oairecerif.author.affiliationFacultad de Ingeniería
oairecerif.author.affiliationFacultad de Ciencias
oairecerif.author.affiliationFacultad de Ingeniería
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relation.isAuthorOfPublicationf5b20190-a260-4e15-8588-3648b5c92dd8
relation.isAuthorOfPublication3ecd9d4d-1971-4ef7-962f-2742b6b1642a
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