Kutsatutako eraikuntza-materialen lixibiazioz eratorritako kutsatzaileen eraginaren ebaluazioa ondoko lurzoruetan

Abstract

Kontzentrazio handietan metal astunak arriskutsuak izan daitezke lurzoruetan. Horregatik, oso interesgarria da lixibiazio-egoerak aztertzea, non ur-fase batek gainazal solido bateko metal adsorbatuak mugitzen dituen. Lan honetarako lurzoruko laginak hartu ziren urtetan metatutako karga kutsatzaile handia zuen eraikin historiko baten ondoan, Punta Begoña (Bizkaia). Lurzoruan zegoen metalen kontzentrazioa Indukzio Bidez Akoplatutako Plasma - Masa Espektrometria (ICP-MS) erabilita determinatu zen. Eraikinaren oinarrian kokatutako lurretan metatutako metalak Fe, Mg, Na, Ba eta Co izan ziren bereziki, zeinak lixibiazioaren ondorioz metatu izan ahal diren. Lurzoruen Legeko (4/2015) Ebaluazio Balio Adierazgarriak (EBA balioak) kontuan hartuta, Punta Begoña Pb-z kutsatuta egoteko arriskua badagoela ondorioztatu zen.Heavy metals can be dangerous at high concentrations in the soil. Therefore, it is very interesting to study leaching situations, where an aqueous phase can mobilize the metals absorbed by a solid surface. Soil samples were taken next to a historic building with a high polluting load accumulated over the years, Punta Begoña (Bizkaia). These samples were analyzed by Inductively coupled plasma mass spectrometry (ICP-MS) to know their metallic composition. The metals accumulated at the base of the building were Fe, Mg, Na, Ba and Co, which may indicate a metallic contribution from the façade due to leaching effects. Using the VIE-B values defined in the BOE2015 for the Autonomous Community of the Basque Country, it was is seen the presence of Pb contamination in Punta Begoña.