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Metals in sediment of four Mediterranean river basins of the Iberian Peninsula: Occurrence and risk assessment

AuthorsBlasco, Julián ; Ginebreda, Antoni
Issue DateNov-2017
CitationGLOBAQUA workshop (2017)
AbstractThe occurrence of metals in environmental compartments is related to both natural processes (weathering, erosion, etc.) and anthropogenicactivities (urban sewage, industrial activities, among others.). Sediment is a key compartment for metal accumulationbecause metals tend to adsorb on particulate material and settling in sediment. Additionally, the sediment has got a high binding capacity for metals and they can be trapped and remain in no bioavailable form. Anyway, the change of physicochemical conditions (redox, resuspension, etc..) can release metals from sediment to the watercolumn, making them bioavailable and thus capable to interact with epibenthic or pelagic aquatic organisms. In the frame of Water Framework Directive (2000/60/EC), hazardous substances, which include metals, must be analysedtoestablish the extent of compliance with environmental quality standards. In order to improve the knowledge about the status of four Mediterranean river basins of Iberian Peninsula (Llobregat, Ebro, Júcar,and Guadalquivir), the SCARCE project was developed (Navarro-Ortega et al., 2012). In the frame of this project, two sediment sampling campaignswere carried out in the four rivers, and 77 sampling stations were monitored. In this work, physicochemical characteristics of the sediment (granulometry, organic matter, organic carbon) and metal concentrations (Ag, Al, Ba, Cd, Co, Cr, Cu, Fe, Hg, Mn, Ni, Sr, Pb, Zn) in total and < 63 m fractions were analysed. To establish the ecotoxicological risk associated withmetal pollution in sediment, measured concentrations have been compared with Canadian Sediment Quality Guidelines and other indicesof metal pollution, identifying hotspots in the four river basins and prioritizing metals responsible of risk.
DescriptionTrabajo presentado en el GLOBAQUA workshop (A reconnaissance of trace organic compounds and metals in globaqua river basins: Effects on ecosystems and risk assessment), celebrado en Barcelona el 9 y 10 de noviembre de 2017.
Appears in Collections:(IDAEA) Comunicaciones congresos
(ICMAN) Comunicaciones congresos
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