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The DOI matches its Crossref record; 31 of the 31 references it cites were found in a registry or an index.

Recovery of Rare Earth Elements and Yttrium from Passive-Remediation Systems of Acid Mine Drainage

Open access
Ayora, Carlos, Macías, Francisco, Torres, Ester, Lozano, Alba, Carrero, Sergio, Nieto, José-Miguel, Pérez-López, Rafael, Fernández-Martínez, Alejandro, Castillo-Michel, Hiram·2016·Environmental Science & Technology

Abstract

Rare earth elements and yttrium (REY) are raw materials of increasing importance for modern technologies, and finding new sources has become a pressing need. Acid mine drainage (AMD) is commonly considered an environmental pollution issue. However, REY concentrations in AMD can be several orders of magnitude higher than in naturally occurring water bodies. With respect to shale standards, the REY distribution pattern in AMD is enriched in intermediate and valuable REY, such as Tb and Dy. The objective of the present work is to study the behavior of REY in AMD passive-remediation systems. Traditional AMD passive remediation systems are based on the reaction of AMD with calcite-based permeable substrates followed by decantation ponds. Experiments with two columns simulating AMD treatment demonstrate that schwertmannite does not accumulate REY, which, instead, are retained in the basaluminite residue. The same observation is made in two field-scale treatments from the Iberian Pyrite Belt (IPB, southwest Spain). On the basis of the amplitude of this process and on the extent of the IPB, our findings suggest that the proposed AMD remediation process can represent a modest but suitable REY source. In this sense, the IPB could function as a giant heap-leaching process of regional scale in which rain and oxygen act as natural driving forces with no energy investment. In addition to having environmental benefits of its treatment, AMD is expected to last for hundreds of years, and therefore, the total reserves are practically unlimited.

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Crossref · 10.1021/acs.est.6b02084

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Metadata

Authors
Ayora, C., Macías, F., Torres, E., Lozano, A., Carrero, S., Nieto, J.-M., Pérez-López, R., Fernández-Martínez, A., & Castillo-Michel, H.
Venue
Environmental Science & Technology
Published
2016-07-12
Volume
50
Issue
15
Pages
8255-8262
ISSN
  • 0013-936X (ISSN-L)
  • 1520-5851
OpenAlex
W2471617027
Cited by
294
References
31
FWCI
13.38
Type
journal article
Language
en
Open access
green

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