Rare earth elements in a historical mining district (south-west Spain): Hydrogeochemical behaviour and seasonal variability

González, Raúl Moreno; Cánovas, Carlos Ruiz; Álvarez, Manuel Olías; Macías, Francisco

doi:10.1016/j.chemosphere.2020.126742

Cited by 14 publications

(5 citation statements)

References 51 publications

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“…In the same range as PAT7, however, with a higher pH and lower concentration of metals, is PAT2. These results are in accordance with the obtained by Gonzalez ( 2020 ) for Tharsis mine. In the previous study, the projection in the Ficklin diagram revealed that samples are mostly classified as high acid-extreme metal and high acid-high metal, like PAT2.…”

Section: Resultssupporting

confidence: 94%

“…EC is also highlighted in PAT7, as it has the highest registered value, with 27,300 μS/cm, in May 2017. Comparing specifically with other sites in the IPB, González et al ( 2020 ) refer to EC values of around 11,000 μS/cm in the Tharsis mines. So, in the present study, São Domingos (PAT7) presents an even superior EC.…”

Section: Resultsmentioning

confidence: 99%

“…Nevertheless, some elements showed minimum concentrations in the dry period, probably due to the intense precipitation of Fe oxyhydroxysulfate and sulfates that incorporated some elements in their structure (González et al 2020 ). These lower concentrations occur for Pb and Cd in PAT11.…”

Section: Resultsmentioning

confidence: 99%

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Seasonal impact of acid mine drainage on water quality and potential ecological risk in an old sulfide exploitation

Gomes,

Valente

2024

Environ Sci Pollut Res

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Sulfides are usually associated with deposits of metals and coal. The reactive wastes from their exploitation, typically stored in piles and tailings dams, are often the mining sector’s primary source of environmental problems. The surrounding river waters can present signs of acid mine drainage, responsible for aquatic ecosystem degradation. So, the main target of the present study is to investigate the impact of this process on the water’s environmental quality and potential ecological risk. The study area is located at the Iberian Pyrite Belt, in an old sulfide exploitation, closed without environmental rehabilitation measures. The results exhibit high sulfate concentrations (410,601 mg/L) and potentially toxic elements, with prominence of Fe (134,000 mg/L), overcoming many other extreme cases of AMD pollution. The Ficklin diagram exposes that most samples are classified as “high-acid, high-metal.” Two of them have extreme classifications (high-acid, extreme-metal). The pH value is well below the acceptable range for the environmental quality of superficial waters (5–7), measuring at a minimum of 0.84. Regarding seasonal variability, the study showed a higher degree of contamination in dry conditions (e.g., 4,420 mg/L of Cu), while the rainy month had lower concentrations of PTE (186.8 mg/L of Cu for the same sampling point). In addition, the water does not accomplish the environmental objectives established by the EU Water Framework Directive. According to the new approach developed based on a scale adjustment, the potential ecological risk index studied indicates that most sampled sites present strong, very strong, and even extremely potential ecological risk. With a typical Mediterranean climate, the region suffers from water scarcity, predicting increasingly in the future more degrading scenarios for water environmental quality. Consequently, urgent mitigation and remediation measures are necessary to improve and preserve water quality and fulfill the objectives of the United Nations Sustainability Development Goals.

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Section: Resultssupporting

confidence: 94%

Section: Resultsmentioning

confidence: 99%

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Seasonal impact of acid mine drainage on water quality and potential ecological risk in an old sulfide exploitation

Gomes,

Valente

2024

Environ Sci Pollut Res

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“…Acid mine drainage can be highly mineralized with REE when strongly acidic water from sulfide oxidation attacks adjacent REE-containing rocks, which can yield another valuable secondary source of REE. At the Tharsis mining district in southwest Spain, acid mine drainage contained up to 8.8 mg/L REE (median 1.7 mg/L) [315]. More than 0.5 mg/L of total REE were reported in mine discharge from the Lower Kittanning coal seam, Pennsylvania [303].…”

Section: Ore Formation Technical Enrichment Methods and Recovery Of Reementioning

confidence: 99%

Rare Earth Elements (REE): Origins, Dispersion, and Environmental Implications—A Comprehensive Review

Sager,

Wiche

2024

Environments

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The rare earth elements (REE) comprise a group of 16 chemically very similar elements that occur widespread in rocks, soils, and water bodies, share similar ionic radii to the essential element Ca2+, and consequently also occur in biota. Given that REE form mainly trivalent cations, they also share similarities to Al3+. Compared to their chemical cognate Ca, they have a higher reactivity. Thus, their accumulation in soils may constitute a severe environmental threat. Over the last decades, the increasing use of REE in modern technology and fertilizers raised concerns about the pollution of soils and water bodies, which led to a rapidly increasing number of publications dealing with REE toxicity to plants, animals and humans, the fate of REE in soil–plant systems, REE cycling in ecosystems and impacts of REE pollution on food security. This review aims to give an overview of the current knowledge on the occurrence of REE in the total environment, including relevant environmental processes governing their mobility, chemical speciation and transfer from abiotic compartments into biota. Beginning with an overview of analytical approaches, we summarize the current knowledge on the ecology of REE in the lithosphere, pedosphere, hydrosphere and biosphere, including impacts of soil pollution on food security and public health.

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“…The concentration of REEs in red muds depend strongly on the lithologies of the bauxite host-rock (Borra et al, 2016) which can be of three types: Tikhvin-type bauxites (0.5 %) lying on aluminosilicate rocks, the "classical" lateritic bauxites (88 %) and karst bauxites (11.5 %), deposits lying on carbonates which may contain the highest amounts of REEs. Waste materials like acid mine drainage (AMD) (Ayora et al, 2016;González et al, 2020;Hedin et al, 2019;Li and Wu, 2017), mine tailings (Zhang et al, 2014) and ashes (Blissett et al, 2014;Funari et al, 2016) have a REEs concentration strongly related to the primary material, thus each case study requires a proper evaluation.…”

Section: Introductionmentioning

confidence: 99%

An Insight into Rees Recovery from Spent Fluorescent Lamps: Evaluation of the Affinity of an Nh4-13x Zeolite Towards CE, La, EU and Y

Colombo,

Fantini,

Di renzo

et al. 2023

Preprint

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Rare earth elements in a historical mining district (south-west Spain): Hydrogeochemical behaviour and seasonal variability

Cited by 14 publications

References 51 publications

Seasonal impact of acid mine drainage on water quality and potential ecological risk in an old sulfide exploitation

Seasonal impact of acid mine drainage on water quality and potential ecological risk in an old sulfide exploitation

Rare Earth Elements (REE): Origins, Dispersion, and Environmental Implications—A Comprehensive Review

An Insight into Rees Recovery from Spent Fluorescent Lamps: Evaluation of the Affinity of an Nh4-13x Zeolite Towards CE, La, EU and Y

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