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Título

Surface geochemistry of soils associated to the Tinto River (Huelva, Spain)

AutorRufo, Lourdes; Rodríguez, Nuria ; Amils, Ricardo; Fuente, Vicenta de la; Jiménez-Ballesta, Raimundo
Palabras claveAcidity
Heavy metals
Nutrients
Mineralogy
Soils
Fecha de publicación25-may-2007
EditorElsevier
CitaciónScience of the Total Environment 378(1-2): 223-227 (2007)
ResumenThe Tinto River (Iberian Pyritic Belt) is a unique ecosystem characterized by extreme acidity and abnormally high concentrations of heavy metals in water, sediments and alluvium, with high microbial diversity and low plant diversity. The low pH value, a direct consequence of the high amount of Fe and S derived from the bedrock, promotes the dispersion of heavy metals. Less mobile elements (Fe, As, Pb, Ag and Ti) show the highest concentrations in the mid stretches of the river while easily mobile metals (Cu, Zn and Cd) accumulate in the estuarine sediments. Tinto River soils show a scarcity of nutrients (Ca, K, P, Mg and Na) due to the lack of lithologic sources and to loss by acid washing. Sea water and phospho-gypsum deposits near Huelva contribute to increase the Na, Mg and P concentrations in the estuarine soils. As a whole these features represent an extreme habitat to which plants must adapt.
Descripción5 pages, 2 figures, 1 table.
Versión del editorhttp://dx.doi.org/10.1016/j.scitotenv.2007.01.051
URIhttp://hdl.handle.net/10261/18569
DOI10.1016/j.scitotenv.2007.01.051
ISSN0048-9697
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