RT Journal Article
T1 Temporal dynamics of contaminants in an estuarine system affected by acid mine drainage discharges
A1 Papaslioti, Evgenia Maria
A1 Giampouras, Manolis
A1 Sánchez López, Laura
A1 Basallote Sánchez, María Dolores
A1 Freydier, Rémi
A1 Ruiz Cánovas, Carlos
A1 Pérez López, Rafael
AB The estuary of Huelva is constituted by the common mouth of the Odiel and Tinto rivers, which are extreme cases of acid mine drainage contamination due to the Iberian Pyrite Belt, the world’s largest sulfide mineral province. The drained acidic waters are subjected to seawater mixing and thus, to dilution and precipitation processes that drive the load of contaminants entering the oceanic environment. This research reports the distribution of major metal(loid)s present in the highly acidic waters across the entire Tinto and Odiel estuarine systems as they are subjected to acid mine drainage neutralization, until reaching the ocean. The datasets presented are divided in low- and high-flow periods, corresponding to dry/warm and wet/cold seasons, respectively. Iron and Al werealmost entirely removed from solution with pH increase at both periods due to their precipitation as schwertmannite and basaluminite, respectively. These mineral phases also, controlled the behavior of As, Cu and Pb, which were removed from solution, with >90 % of their concentration ending up in the particulate phase due to sorption processes. However, at pH >7, As returned entirely to the dissolved phase at both sampled seasons because of desorption, similarly to Cu at the low-flow period. On the other hand, concentrations of Zn, Cd, Mn, Co and Ni in solution decreased only by dilution with seawater, with null partitioning to any sorption processes during estuarine mixing until reaching the Atlantic Ocean.
PB Elsevier
SN 0048-9697
SN 1879-1026 (electrónico)
YR 2024
FD 2024-07
LK https://hdl.handle.net/10272/24530
UL https://hdl.handle.net/10272/24530
LA eng
NO Papaslioti, E.-M., Giampouras, M., Sánchez-López, L., Basallote, M. D., Freydier, R., Cánovas, C. R., & Pérez-López, R. (2024). Temporal dynamics of contaminants in an estuarine system affected by acid mine drainage discharges. In Science of The Total Environment (Vol. 947, p. 174683). Elsevier BV. https://doi.org/10.1016/j.scitotenv.2024.174683
NO This work was supported by the research project TRAMPA (PID2020-119196RBC21) funded by MCIN/AEI/10.13039/501100011033. Dr. M. Giampouras acknowledges the ‘Juan de la Cierva e Formacion’ (FJC2021-048014-I) Fellowship funded by MCIN/AEI/10.13039/501100011033. L. Sánchez-López acknowledges the “Formación de Personal Investigador” grant (PRE2021-097651) funded by MCIN/AEI/10.13039/501100011033. M. D. Basallote thanks the Regional Government of Andalusia for the EMERGIA grant (EMC21_00363) and MCIN for the RYC2022-035326-I grant funded by MCIN/AEI/10.13039/501100011033 and FSE+. C.R Cánovas thanks the Spanish Ministry of Science and Innovation for the Postdoctoral Fellowship granted under application reference RYC2019-027949-I funded by MCIN/AEI/10.13039/501100011033. Universidad de Huelva/CBUA is acknowledged for funding the open access charge.
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026