Vertidos de escorias en el Rio Oka (Reserva Natural de la Biosfera de Urdaíbaí, Vizcaya): Aspectos mineralógicos y geoquímicos

Abstract

As a part of a wider effort to provide a view of the environmental conditions of some basque rivers, mineralogy and heavy metal geochemistry of foundry slags dumped in the Oka river (Vizcaya) and sediments were studied. Slags are composed of iron-enriched minerals (fayalite, wüstite, hematite and goethite), while quartz, calcite and phyllosilicates are the main component of sediments. Geochemical results confirm the low capacity of thesé slags as a significant source of heavy metals to the environment