Mobility of rare earth elements in mine drainage: Influence of iron oxides, carbonates, and phosphates

Chemosphere
Mohamed EdahbiMia Pelletier

Abstract

The geochemical behavior of rare earth elements (REE) was investigated using weathering cells. The influence of sorption and precipitation on dissolved REE mobility and fractionation is evaluated using synthetic iron-oxides, carbonates, and phosphates. Sorption cell tests are conducted on the main lithologies of the expected waste rocks from the Montviel deposit. The sorbed materials are characterized using a scanning electron microscope (SEM) equipped with a microanalysis system (energy dispersive spectroscopy EDS) (SEM-EDS), X-ray diffraction (XRD), and X-ray absorption near edge structure (XANES) in order to understand the effect of the synthetic minerals on REE mobility. The results confirm that sorption and precipitation control the mobility and fractionation of REE. The main sorbent phases are the carbonates, phosphates (present as accessory minerals in the Montviel waste rocks), and iron oxides (main secondary minerals generated upon weathering of the Montviel lithologies). The XANES results show that REE are present as trivalent species after weathering. Thermodynamic equilibrium calculations results using Visual Minteq suggest that REE could precipitate as secondary phosphates (REEPO4).

References

May 19, 2006·Journal of Colloid and Interface Science·Murat Erdemoğlu, Musa Sarikaya
Mar 22, 2013·Safety and Health at Work·Kyung Taek RimJung Sun Park
Jun 29, 2016·Environmental Science & Technology·Carlos AyoraHiram A Castillo-Michel
Jan 9, 2017·Advances in Colloid and Interface Science·Dawoud Al MahrouqiMatthew D Jackson
Feb 7, 2018·Environmental Science and Pollution Research International·Mohamed EdahbiMia Pelletier

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Citations

Sep 19, 2020·Environmental Science and Pollution Research International·Pablo León HiguerasJuan Antonio Campos
May 22, 2020·The Science of the Total Environment·Sophie CostisJean-Francois Blais
Aug 16, 2019·The Science of the Total Environment·Jean RillardLorenzo Brusca

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