English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/99315
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Geochemical speciation of heavy metals in semiarid soils of the central Ebro Valley (Spain)

AutorNavas Izquierdo, Ana ; Lindhorfer, Harald
Palabras claveGeochemical phases
Heavy metals
NE Spain
Semiarid soils
Sequential extraction
Fe, Mn, Zn, Cr
Central Ebro valley
Fecha de publicaciónabr-2003
EditorPergamon Press
CitaciónEnvironmental International 29 (1): 61-68 (2003)
ResumenThis study describes the chemical speciation of Fe, Mn, Zn and Cr in four selected soil types representative of the more abundant agricultural soils in the central Ebro river valley in Aragón. Gypsisols, Calcisols, Solonchaks and Solonetzs represent around 20% of the total soil surface in the region. A total of 12 selected sites have been sampled and five subsamples were taken in each site to create a composite sample. The four elements have been analysed by the sequential extraction procedure of Tessier et al. [Anal. Chem. 51 (1979) 844.] by emission atomic spectrometry of solid state (ICP OES). Very little amounts of Fe and Mn were retrieved from the exchangeable phase, the ready available for biogeochemistry cycles in the ecosystems. Therefore, low quantities of Fe and Mn can be taken up by plants in these alkaline soils. Cr was not detected in the bioavailable forms as well as Zn that was only present in negligible amounts in very few samples. The absence of mobile forms of Cr in all soils eliminates the toxic risk both in the trophic chain and from its migration downwards the soil profile. The largest contents of Fe, Zn and Cr were retrieved from the residual phase where metals are strongly bound to minerals, whereas Mn from the carbonate and oxide phases amounts 80% of its total content. Gypsisols and Calcisols have the lowest metal contents while the highest are found in Solonetzs and Solonchaks. © 2002 Elsevier Science Ltd. All rights reserved.
Versión del editorhttp://dx.doi.org/10.1016/S0160-4120(02)00146-0
Identificadoresdoi: 10.1016/S0160-4120(02)00146-0
issn: 0160-4120
Aparece en las colecciones: (EEAD) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
accesoRestringido.pdf15,38 kBAdobe PDFVista previa
Mostrar el registro completo

NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.