Assessment of the mobility of metals in a mining-impacted coastal area (Spain, Western Mediterranean)
A study on metal mobilisation (Zn, Pb and As) from contaminated sediments in Portman Bay (SE Spain) was carried out. Thisarea has suffered a major impact from mining activity, as millions of tons of mine tailings have been dumped into the bay over a long period, gradually filling the bay. A three-st...
| Autores: | ; ; ; ; ; ; |
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| Tipo de documento: | Artículo |
| Fecha de publicación: | 2008 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Lenguaje: | Inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/52396 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/52396 |
| Nivel de acceso: | Acceso abierto |
| Palabra clave: | 551.4 Contaminated sediments Metal mobility BCR sequential extraction procedure Acid volatile sulfides (AVS) Edafología (Geología) Mineralogía (Geología) 2511 Ciencias del Suelo (Edafología) 2506.11 Mineralogía |
| _version_ | 1878733041362272256 |
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| author | Martínez Sánchez, Maria José |
| author2 | Navarro, M. C. Pérez Sirvent, Carmen Marimón, J. Vidal, JU. García Lorenzo, María de la Luz Bech, Jaume |
| author2_role | author author author author author author |
| author_browse | Bech, Jaume García Lorenzo, María de la Luz Marimón, J. Martínez Sánchez, Maria José Navarro, M. C. Pérez Sirvent, Carmen Vidal, JU. |
| author_facet | Martínez Sánchez, Maria José Navarro, M. C. Pérez Sirvent, Carmen Marimón, J. Vidal, JU. García Lorenzo, María de la Luz Bech, Jaume |
| author_role | author |
| collection | Docta Complutense |
| description | A study on metal mobilisation (Zn, Pb and As) from contaminated sediments in Portman Bay (SE Spain) was carried out. Thisarea has suffered a major impact from mining activity, as millions of tons of mine tailings have been dumped into the bay over a long period, gradually filling the bay. A three-step sequential extraction procedure, modified from the BCR (Community Bureau of Reference) method, as well as selective extractions (H2O, 0.1 N HNO3, citrate–dithionite and 1 M NH4OAc after H2O2 attack) were applied to selected samples in order to evaluate the potential mobility of fixed metals. Acid volatile sulfides (AVS) and simultaneously extracted metals (SEM) were also determined. X-ray diffraction (XRD) and scanning electron microscopy coupled to with an energy-dispersion spectrometry (SEM-EDS) were applied to the characterization of both raw samples and the residues remaining after each extraction, providing additional information about the sediment phases carrying the metals studied. Metals associated with sediments showed different behaviour depending on the mineralogical phase they were bound to. Zn was the most labile metal, while Pb and As showed a lower mobility. The fraction of metals associated with jarosites presented a high stability under different physicochemical conditions, while metals associated with mineralogical phases that are undergoing supergenic alteration processes presented a high mobility. The results obtained may be useful to assess both the short and the long-term environmental impact of such disposal activities as well as supporting decisions for a future remediation of the zone. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | ES_4ef0fa81d6b16bb1f8d13f8322de0c6b |
| institution | Universidad Complutense de Madrid (UCM) |
| instname_str | Universidad Complutense de Madrid (UCM) |
| language | eng |
| network_acronym_str | ES |
| network_name_str | España |
| oai_identifier_str | oai:docta.ucm.es:20.500.14352/52396 |
| publishDate | 2008 |
| publishDateSort | 2008 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| reponame_str | Docta Complutense |
| spelling | Assessment of the mobility of metals in a mining-impacted coastal area (Spain, Western Mediterranean) Martínez Sánchez, Maria José Navarro, M. C. Pérez Sirvent, Carmen Marimón, J. Vidal, JU. García Lorenzo, María de la Luz Bech, Jaume 551.4 Contaminated sediments Metal mobility BCR sequential extraction procedure Acid volatile sulfides (AVS) Edafología (Geología) Mineralogía (Geología) 2511 Ciencias del Suelo (Edafología) 2506.11 Mineralogía A study on metal mobilisation (Zn, Pb and As) from contaminated sediments in Portman Bay (SE Spain) was carried out. Thisarea has suffered a major impact from mining activity, as millions of tons of mine tailings have been dumped into the bay over a long period, gradually filling the bay. A three-step sequential extraction procedure, modified from the BCR (Community Bureau of Reference) method, as well as selective extractions (H2O, 0.1 N HNO3, citrate–dithionite and 1 M NH4OAc after H2O2 attack) were applied to selected samples in order to evaluate the potential mobility of fixed metals. Acid volatile sulfides (AVS) and simultaneously extracted metals (SEM) were also determined. X-ray diffraction (XRD) and scanning electron microscopy coupled to with an energy-dispersion spectrometry (SEM-EDS) were applied to the characterization of both raw samples and the residues remaining after each extraction, providing additional information about the sediment phases carrying the metals studied. Metals associated with sediments showed different behaviour depending on the mineralogical phase they were bound to. Zn was the most labile metal, while Pb and As showed a lower mobility. The fraction of metals associated with jarosites presented a high stability under different physicochemical conditions, while metals associated with mineralogical phases that are undergoing supergenic alteration processes presented a high mobility. The results obtained may be useful to assess both the short and the long-term environmental impact of such disposal activities as well as supporting decisions for a future remediation of the zone. Elsevier https://hdl.handle.net/20.500.14352/52396 |
| spellingShingle | Assessment of the mobility of metals in a mining-impacted coastal area (Spain, Western Mediterranean) Martínez Sánchez, Maria José 551.4 Contaminated sediments Metal mobility BCR sequential extraction procedure Acid volatile sulfides (AVS) Edafología (Geología) Mineralogía (Geología) 2511 Ciencias del Suelo (Edafología) 2506.11 Mineralogía |
| title | Assessment of the mobility of metals in a mining-impacted coastal area (Spain, Western Mediterranean) |
| title_full | Assessment of the mobility of metals in a mining-impacted coastal area (Spain, Western Mediterranean) |
| title_fullStr | Assessment of the mobility of metals in a mining-impacted coastal area (Spain, Western Mediterranean) |
| title_full_unstemmed | Assessment of the mobility of metals in a mining-impacted coastal area (Spain, Western Mediterranean) |
| title_short | Assessment of the mobility of metals in a mining-impacted coastal area (Spain, Western Mediterranean) |
| title_sort | Assessment of the mobility of metals in a mining-impacted coastal area (Spain, Western Mediterranean) |
| topic | 551.4 Contaminated sediments Metal mobility BCR sequential extraction procedure Acid volatile sulfides (AVS) Edafología (Geología) Mineralogía (Geología) 2511 Ciencias del Suelo (Edafología) 2506.11 Mineralogía |
| topic_facet | 551.4 Contaminated sediments Metal mobility BCR sequential extraction procedure Acid volatile sulfides (AVS) Edafología (Geología) Mineralogía (Geología) 2511 Ciencias del Suelo (Edafología) 2506.11 Mineralogía |
| url | https://hdl.handle.net/20.500.14352/52396 |