Mineralogy, Geochemistry and Environmental Hazards of Different Types of Mining Waste from a Former Mediterranean Metal Mining Area
Entity
UAM. Departamento de Química AgrícolaPublisher
MDPIDate
2023-02-17Citation
10.3390/land12020499
Land 12.2 (2023): 499
ISSN
2073-445XDOI
10.3390/land12020499Subjects
abandoned metal mines; mine waste characterization; tailing typology; environmental hazards; Cartagena–La Unión mining area; Spain; GeologíaRights
© 2023 by the authors. Licensee MDPI, Basel, Switzerland.Abstract
: Mine waste constitutes one of the biggest environmental and management problems, both
due to its quantity and its danger when they are rich in toxic elements. There is a wide variety of
waste from the oxidation of ores in metal mining areas, both metal sulphide and other minerals. These
residues may be enriched in potentially toxic elements that can spread and contaminate ecosystems,
farmland and villages. This study has focused on the characterization and evaluation of residues
derived from metal-bearing mining waste in abandoned mining areas. Mineralogy and geochemical
characteristics were determined by XRD, WDXRF and TG-MS techniques. In addition, DIN 38414-S4
leaching tests were carried out to assess the risk and mobility of potentially toxic elements. Silicates
and oxides were found as the main mineral groups, followed by sulphates. These tailings were
particularly enriched in Zn, Pb, As, Sb and Cd, while their leachates had high or extreme metal
content. Consequently, these mining wastes are considered toxic and hazardous, even for landfills.
Sulphides, as the primary source, and sulphates from their oxidation, were the main sources of
these pollutants. Sulphates, As, Zn, Cd and Cu determined the specific environmental impact of the
different tailing types, which were grouped into different clusters according to their mineralogy and
geochemistry. These results provided a better understanding of the environmental hazards associated
with the different types of metal mining waste in the area studied
Files in this item
Google Scholar:Rodríguez-Pacheco, Roberto
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García, Gregorio
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Caparrós-Ríos, Ana Vanessa
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Robles-Arenas, Virginia
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García-García, Cristóbal
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Millán, Rocío
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Pérez Sanz, Araceli
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Alcolea-Rubio, Luis Alberto
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