RT Journal Article
T1 Passive remediation of mine waters from Parys Mountain (Wales): Laboratory column experiments
A1 Millán Becerro, Ricardo
A1 Ruiz Cánovas, Carlos
A1 Macías Suárez, Francisco
A1 Röetting, Tobias S
A1 Siddorn, Louise
A1 Stanley, Peter
A1 Nieto Liñán, José Miguel
AB This study evaluates the effectiveness of dispersed alkaline substrate (DAS) technology to treat highly acidic and contaminated leachates from the oxidation of sulfide-rich mining wastes under wet temperate oceanic climate conditions. To address this issue, leachates from the abandoned mine at Parys Mountain (NW Wales) were passed through two sets of multistep columns filled with a mixture of a fine-grained alkaline reagent (i.e., limestone, MgO, or BaCO3) scattered in an inert matrix. The set of columns with the limestone-DAS plus MgO-DAS combination achieved a near total removal of Fe, Al, Zn, Cu, Mn, As, Co, Cd, and Ni. However, the elimination of SO4 was not significant (around 7%). The limestone-DAS plus BaCO3-DAS combination also achieved a high effectiveness for base metal/loids, allowing the removal of Fe, Al, Zn, Cu, As, and Cd with rates of nearly 100%. In addition, the system with the BaCO3-step had a higher effectiveness in eliminating SO4 (around 53%) than the combined treatment with the MgO-step. According to PHREEQC code calculations, the precipitation of oxyhydroxy-sulfates (i.e., schwertmannite and basaluminite) and carbonate (i.e., malachite, hydrozincite and calcite) phases may have controlled the solubility of pollutants during the passive treatment. The chemical compositions of the treated waters complied with the threshold values defined by irrigation standards, except for Mn in the BaCO3-DAS output.
PB Elsevier
SN 0959-6526
YR 2023
FD 2023
LK https://hdl.handle.net/10272/22542
UL https://hdl.handle.net/10272/22542
LA eng
NO Millán-Becerro, R., Cánovas, C. R., Macías, F., Roetting, T. S., Siddorn, L., Stanley, P., & Nieto, J. M. (2023). Passive remediation of mine waters from Parys Mountain (Wales): Laboratory column experiments. In Journal of Cleaner Production (Vol. 425, p. 138872). Elsevier BV. https://doi.org/10.1016/j.jclepro.2023.138872
NO Funding for open access charge: Universidad de Huelva/CBUA.
DS Repositorio Institucional de la Universidad de Huelva
RD 1 jun 2026