Mobility of rare earth elements, yttrium and scandium from a phosphogypsum stack: Environmental and economic implications

This paper investigates the mobility and fluxes of REE, Y and Sc under weathering conditions from an anomalously metal-rich phosphogypsum stack in SW Spain. The interactions of the phosphogypsum stack with rainfall and organic matter-rich solutions, simulating the weathering processes observed due t...

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Bibliographic Details
Published in:The Science of the total environment 2018-03, Vol.618, p.847-857
Main Authors: Cánovas, Carlos Ruiz, Macías, Francisco, Pérez López, Rafael, Nieto, José Miguel
Format: Article
Language:English
Subjects:
Fractionation processes
Leaching test
REE fractionation
REE scavenging
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Summary:This paper investigates the mobility and fluxes of REE, Y and Sc under weathering conditions from an anomalously metal-rich phosphogypsum stack in SW Spain. The interactions of the phosphogypsum stack with rainfall and organic matter-rich solutions, simulating the weathering processes observed due to its location on salt-marshes, were simulated by leaching tests (e.g. EN 12457-2 and TCLP). Despite the high concentration of REE, Y and Sc contained in the phosphogypsum stack, their mobility during the leaching tests was very low;
ISSN:0048-9697
1879-1026
DOI:10.1016/j.scitotenv.2017.08.220