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Sampling high to extremely high hg concentrations at the cerco de almadenejos, Almadén mining district (Spain): the old metallurgical precinct (1794 to 1861 ad) and surrounding areas.

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dc.contributor.author Higueras Higueras, Pablo Leon es_ES
dc.contributor.author Martinez Coronado, Alba es_ES
dc.contributor.author Oyarzun Muñoz, Roberto es_ES
dc.contributor.author Llanos Lazcano, Willans es_ES
dc.contributor.author Esbri Victor, Jose Maria es_ES
dc.date.accessioned 2011-09-26T10:55:33Z
dc.date.available 2011-09-26T10:55:33Z
dc.date.issued 2011 es_ES
dc.identifier.citation Journal of geochemical exploration, 2011, 109: 70-77 es_ES
dc.identifier.uri http://hdl.handle.net/10578/1366
dc.description.abstract The Cerco de Almadenejos (CDA) is an old metallurgical site located in the province of Ciudad Real (Spain) that operated between 1794 and 1861. The metallurgical precinct was built for the roasting of the Almadén and Almadenejos cinnabar ore to extract Hg metal. A previous pilot geochemical study of soils at the CDA had already shown extremely high concentrations of Hg. To analyze the extent and intensity of contamination, we planned and executed a geochemical survey to cover the CDA and the surrounding areas. The survey covered soils, air, and plants. The planning involved the design of two sampling grids in order to obtain a comprehensive picture of potential environmental hazards in the area: 1) a detailed sampling grid centred on the metallurgical precinct (n=16 samples; area=3.6×104 m2); and 2) a less detailed sampling grid planned to determine the extension of contamination beyond the metallurgical site (n=35 samples; area=1.2×106 m2). After variogram modelization of geochemical data, the kriging plots showed that contamination, even if centred at the precinct, extends beyond the site, with Hg concentrations of up to 2200 times those of uncontaminated soils (world baseline). The detailed study of the soils from the precinct shows an extremely high mean concentration of 4220 #956;g Hg g#8722;1 (4.2×105 times baseline concentration). In turn, these highly polluted soils induce strong emissions of Hg(g), with concentrations of up to 970 ng Hg m#8722;3. The study of the edible wild asparagus Asparagus acutifolius shows extremely high concentrations of mercury in roots (0.6?443 #956;g g#8722;1) and stems (0.3?140 #956;g g#8722;1). The data indicate that the study area constitute a hot spot of contamination and is a potential health/environmental hazard for the inhabitants of Almadenejos, livestock, and wild life, that requires immediate action via remediation procedures. es_ES
dc.format text/plain en_US
dc.language.iso es en_US
dc.rights info:eu-repo/semantics/openAccess en_US
dc.subject Ciencias de la tierra es_ES
dc.subject Ciencias naturales y ciencias de la salud es_ES
dc.title Sampling high to extremely high hg concentrations at the cerco de almadenejos, Almadén mining district (Spain): the old metallurgical precinct (1794 to 1861 ad) and surrounding areas. es_ES
dc.type info:eu-repo/semantics/article en_US


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