| one publication added to basket [29323] | Influence of the Aznalcóllar mining spill on the vertical distribution of heavy metals in sediments from the Guadalquivir estuary (SW Spain)
Riba, I.; DelValls, T.A.; Forja, J.M.; Gómez-Parra, A. (2002). Influence of the Aznalcóllar mining spill on the vertical distribution of heavy metals in sediments from the Guadalquivir estuary (SW Spain). Mar. Pollut. Bull. 44(1): 39-47
In: Marine Pollution Bulletin. Macmillan: London. ISSN 0025-326X; e-ISSN 1879-3363, more
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| Keywords |
Acids
Chemical elements > Metals > Heavy metals
Chemical speciation
Mining
Pollution > Sediment pollution
MED, Spain, Guadalquivir estuary [Marine Regions]; Spain, Andalusia [Marine Regions]
Marine/Coastal |
| Authors | | Top |
- Riba, I.
- DelValls, T.A., correspondent
- Forja, J.M.
- Gómez-Parra, A.
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| Abstract |
The Natural Park of Doñana and the Guadalquivir estuary were impacted by the release of 6 million cubic meters of acid waste after the mine-tailing spill in Aznalcóllar (Andalusia, SW, Spain). Here is presented the monitoring of the accidental spill on vertical distribution of heavy metals in the estuarine sediments. The total concentration of six metals (Fe, Mn, Zn, Cd, Pb, Cu), their chemical speciation and the organic carbon concentration were analyzed in sediment vertical profiles. The results obtained determine background levels similar to previously reported in the area. The analysis catalogues the impact of the accident on the estuary as acute and mainly associated with high concentrations of Zn and Cd. The recent enrichment in Zn and Cd and their geochemical association with the more mobile fractions of the sediment determine an environmental risk associated with the acute impact and detected in some of the areas of the estuary. |
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