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Evaluating natural and anthropogenic inputs on the distribution of potentially toxic elements in urban soil of Valdivia, Chile.
Tardani, Daniele; Vera, Francisca; Álvarez-Amado, Fernanda; Tolorza, Violeta; Lacassie, Juan Pablo; Jullian, Domingo; Sepúlveda, Carolina; Sánchez-Alfaro, Pablo; Daniele, Linda; Gutiérrez, Leopoldo.
Afiliación
  • Tardani D; Instituto de Ciencias de la Ingeniería, Universidad de O'Higgins, Rancagua, Chile.
  • Vera F; Facultad de Ciencias, Instituto de Ciencias de la Tierra, Universidad Austral de Chile, Valdivia, Chile. francisca.vera01@alumnos.uach.cl.
  • Álvarez-Amado F; Departamento de Ciencias de la Tierra, Facultad de Ciencias Químicas, Universidad de Concepción, Concepción, Chile.
  • Tolorza V; Water Research Center for Agriculture and Mining - CRHIAM, FONDAP ANID Center, Concepción, Chile.
  • Lacassie JP; Universidad de La Frontera, Temuco, Chile.
  • Jullian D; Servicio Nacional de Geología y Minería, Dirección Regional de Los Ríos, Valdivia, Chile.
  • Sepúlveda C; Instituto de Ciencias de la Ingeniería, Universidad de O'Higgins, Rancagua, Chile.
  • Sánchez-Alfaro P; Facultad de Ciencias, Instituto de Ciencias de la Tierra, Universidad Austral de Chile, Valdivia, Chile.
  • Daniele L; Facultad de Ciencias, Instituto de Ciencias de la Tierra, Universidad Austral de Chile, Valdivia, Chile.
  • Gutiérrez L; Departamento de Geología, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Santiago, Chile.
Environ Geochem Health ; 45(11): 7841-7859, 2023 Nov.
Article en En | MEDLINE | ID: mdl-37490144
The increasing population in urban areas in the last decades requires an effort to understand the geochemistry of contaminant elements in urban soil. Topsoil plays a crucial role in the exposure of Potentially Toxic Elements (PTEs) to humans through ingestion, dermal contact, and inhalation. In Chile, the last census revealed that 88.6% of people live in cities or towns and only 11.4% in rural areas. This study presents the first systematic geochemical survey of urban soil in the city of Valdivia, in the South of Chile. Topsoil samples (0-10 cm depth) were collected in less disturbed locations within the city at 130 sampling sites using a grid of 0.25 km2 squares covering a total area of approximately 30 km2. The concentrations of Al, Fe, Na, Ca, Mg, K, Ti, Be, V, Cr, Mn, Co, Ni, Cu, Zn, As, Mo, Sn, Cd, Se, Pb and Hg were measured. The results showed that high concentrations of Cu, V, Zn and Pb are located mainly in the city's northern area and exceed international soil quality legislation for agricultural use. Data processing comprised plotting of individual spatial distribution maps and the use of a combination of multivariate statistical methods. Hierarchical cluster analysis and principal component analysis identified three element associations. The two element groups V-Al-Ti-Fe-Cr-Co-Mn-Be-Ni and Ca-Na-K-As-Mg are interpreted as a dominant lithological origin related to the most pristine soil conditions in less populated areas. By contrast, the Sn-Pb-Zn-Mo-(Cu-Hg) association presents a significant correlation with urbanization indicators, including vehicular traffic and industrial activities developed since the end of the nineteenth century in Valdivia.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes del Suelo / Metales Pesados / Mercurio Tipo de estudio: Prognostic_studies / Risk_factors_studies Límite: Humans País/Región como asunto: America do sul / Chile Idioma: En Revista: Environ Geochem Health Asunto de la revista: QUIMICA / SAUDE AMBIENTAL Año: 2023 Tipo del documento: Article País de afiliación: Chile Pais de publicación: Países Bajos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Contaminantes del Suelo / Metales Pesados / Mercurio Tipo de estudio: Prognostic_studies / Risk_factors_studies Límite: Humans País/Región como asunto: America do sul / Chile Idioma: En Revista: Environ Geochem Health Asunto de la revista: QUIMICA / SAUDE AMBIENTAL Año: 2023 Tipo del documento: Article País de afiliación: Chile Pais de publicación: Países Bajos