Mobility indices for the assessment of metal contamination in soils affected by old mining activities

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dc.contributor.authorGarcía Lorenzo, María De La Luz
dc.contributor.authorPérez Sirvent, Carmen
dc.contributor.authorMolina Ruiz, José
dc.contributor.authorMartínez Sánchez, María José
dc.date.accessioned2023-06-19T13:41:28Z
dc.date.available2023-06-19T13:41:28Z
dc.date.issued2014
dc.description.abstractThis work presents a methodology to assess the environmental potential risk of soils when submitted to different conditions. The potentially toxic element (PTE) behaviour was evaluated by single chemical extractions in order to simulate four conditions: PTEs leaching under actual rainfall conditions; acid mine drainage; and an anoxic and an oxic environment. Soil pollution assessment was carried out using the contamination factor (CF) and the pollution load index (PLI) for total contents and indicators of mobility were established for each extraction: natural mobility indicator (NMI), acid mine drainage mobility indicator (AMI), oxic mobility indicator (OMI) and anoxic mobility indicator (ANMI). The total PTE content in the samples was high, and this content decreased when the distance of the sampling site to the source of contamination increased. The results obtained after the extractions suggested that the highest PTE content was extracted in the acidic medium. The mineralogical composition is an important factor that should be taken into account in the evaluation of PTE mobility, firstly because the mineral phases react differently in the proposed situations depending on their chemical nature, and secondly, because the presence of a particular phase (with different degree of reactivity) depends on the degree of weathering. The most reactive materials under oxic conditions are, in the study area, the most modern. The proposed indices may constitute a first attempt to define areas with high potential environmental risk, where urgent action is needed. In addition, the proposed methodology could be a valuable tool to prioritise these interventions.
dc.description.departmentDepto. de Mineralogía y Petrología
dc.description.facultyFac. de Ciencias Geológicas
dc.description.refereedTRUE
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/63659
dc.identifier.doi10.1016/j.gexplo.2014.06.012
dc.identifier.issn0375-6742
dc.identifier.officialurlhttp://dx.doi.org/10.1016/j.gexplo.2014.06.012
dc.identifier.relatedurlhttp://www.elsevier.com/locate/jgeoexp
dc.identifier.urihttps://hdl.handle.net/20.500.14352/34271
dc.journal.titleJournal of Geochemical Exploration
dc.language.isoeng
dc.page.final129
dc.page.initial117
dc.publisherElsevier
dc.rights.accessRightsrestricted access
dc.subject.cdu549
dc.subject.cdu631.472.6
dc.subject.cdu550.4
dc.subject.keywordPotentially toxic elements
dc.subject.keywordSelective extractions
dc.subject.keywordSoil contamination
dc.subject.keywordMining activities
dc.subject.keywordMobility indicators
dc.subject.ucmGeoquímica
dc.subject.ucmMineralogía (Geología)
dc.subject.unesco2503 Geoquímica
dc.subject.unesco2506.11 Mineralogía
dc.titleMobility indices for the assessment of metal contamination in soils affected by old mining activities
dc.typejournal article
dc.volume.number147
dspace.entity.typePublication
relation.isAuthorOfPublicationeaa7540f-1da5-415c-a340-11293d2fccbe
relation.isAuthorOfPublication.latestForDiscoveryeaa7540f-1da5-415c-a340-11293d2fccbe
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