RT Journal Article
T1 Effects of estuarine water mixing on the mobility of trace elements in acid mine drainage leachates
A1 Pérez López, Rafael
A1 Millán Becerro, Ricardo
A1 Basallote Sánchez, María Dolores
A1 Carrero Romero, Sergio
A1 Parviainen, Annika
A1 Freydier, Rémi
A1 Macías Suárez, Francisco
A1 Ruiz Cánovas, Carlos
AB This research reports the effects of pH increase on contaminant mobility in acid mine drainage from the Iberian Pyrite Belt by seawater mixing in the laboratory, simulating the processes occurring in the Estuary of Huelva (SW Iberian Peninsula). Concentrations of Al, Fe, As, Cu and REY in mixing solutions significantly decreased with increasing pH. Schwertmannite precipitation at pH 2.5–4.0 led to the total removal of Fe(III) and As. Subsequently, iron-depleted solutions began to be controlled by precipitation of basaluminite at pH 4.5–6.0, which acted as a sink for Al, Cu and REY. Nevertheless, as the pH rises, schwertmannite becomes unstable and releases back to solution the previously retained As. Moreover, other elements (S, Zn, Cd, Ni and Co) behaved conservatively in mixing solutions with no participation in precipitation processes. Some toxic elements finally end up to the Atlantic Ocean contributing to the total pollutant loads and environmentally threatening the coastal areas.
PB Elsevier
SN 0025-326X
SN 1879-3363 (electrónico)
YR 2023
FD 2023
LK https://hdl.handle.net/10272/21421
UL https://hdl.handle.net/10272/21421
LA eng
NO Pérez-López, R., Millán-Becerro, R., Basallote, M. D., Carrero, S., Parviainen, A., Freydier, R., Macías, F., & Cánovas, C. R. (2023). Effects of estuarine water mixing on the mobility of trace elements in acid mine drainage leachates. In Marine Pollution Bulletin (Vol. 187, p. 114491). Elsevier BV. https://doi.org/10.1016/j.marpolbul.2022.114491
NO This work was supported by the Spanish Ministry of Science and Innovation under the research project TRAMPA (PID2020-119196RB- C21). C.R. C´anovas, A. Parviainen and M.D. Basallote also acknowledge the Spanish Ministry of Science and Innovation for the Postdoctoral Fellowships granted under application references RYC2019-027949-I, IJCI-2016-27412 and IJC2018-035056-I, respectively. We would also like to thank Dr. Geoff MacFarlane for the editorial handling and two anonymous reviewers for the support and comments that significantly improved the quality of the original paper. Funding for open access charge: Universidad de Huelva/CBUA.
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026