Lixiviación de metales de sedimentos mineros hacia el medio hídrico en el distrito minero de Cartagena-La Unión (Murcia)
- O. González Fernández 1
- I. Queralt 1
- Gregorio García Fernández 2
- Lucila Candela Lledó 3
- 1 Departamento de Geofísica y Georiesgos, Instituto de Ciencias de la Tierra “Jaume Almera”, CSIC.
- 2 Área de Edafología y Química Agrícola, Departamento de Ciencia y Tecnología Agraria, Universidad Politécnica de Cartagena
- 3 Grupo de Hidrología Subterránea, Departamento de Ingeniería del Terreno, Universidad Politécnica de Cataluña
ISSN: 1576-5172
Year of publication: 2008
Issue Title: VII Congreso Geológico de España
Issue: 10
Pages: 1129-1132
Type: Article
More publications in: Geotemas (Madrid)
Abstract
In this study was evaluated the content of Cr, Cu, As, Zn and Pb in a sediment core at the Cartagena-La Unión mining district (Murcia Province) by means of X-ray fluorescence spectrometry. Additionally, the potential metals’ leaching to the hydrologic media was evaluated both through the use of the DIN 38414-S4 test and the mineralogy determined by means of X-ray diffraction. The observed heavy metal contents of the sediments overpass the levels established by the Spanish regulations to be considered as polluted soils for all the metals studied except Cr. Lixiviation tests exhibit a very high metal content reaching up to two orders of magnitude higher than the established values for drinking waters. Regarding to leaching percentages, they are low respect to the total heavy metal content (1-2%) except for Zn where the leaching content arrives to 60% in some levels. Mineralogy is especially noticeable for the case of Pb mobility.