RT Journal Article
T1 Metal(loid) Attenuation Processes in an Extremely Acidic River: The Rio Tinto (SW Spain)
A1 Ruiz Cánovas, Carlos
A1 Olías Álvarez, Manuel
A1 Nieto Liñán, José Miguel
AB This study deals with the hydrogeochemical changes and metal(loid) attenuation processes along the extremely acidic Rio Tinto (SW Spain). The geochemistry of Tinto headwaters is determined by the variability of mining discharges due to different geological, geochemical and hydrological controls. Downstream of the mining area, a decrease in most dissolved element concentrations is recorded. However, not all elements decreased its concentration to the same extent, and even some did not decrease (e.g., Ba and Pb). A group of elements formed by Al, Cd, Co, Cr, Cu, Li, Mg, Mn, Ni and Zn behaved quasi-conservatively; mainly affected by dilution, except at the lower part of the catchment where seem to be affected by sorption/coprecipitation (e.g., Cd, Cu, and Zn) or mineral dissolution processes (e.g., Al,Mg). Iron and As exhibited a non-conservative behaviour due to ochre precipitation and sorption processes, respectively. A group of elements formed by Ca, Na, Sr and Li did not behave conservatively; waters were enriched in these elements by dissolutive reactions of carbonates and aluminosilicates from bedrocks. The behaviour of Pb in the Rio Tinto is complex; values fluctuate along the river course and its solubility may be related to the nature of Fe precipitates.
PB Springer
SN 0049-6979
SN 1573-2932 (electrónico)
YR 2014
FD 2014
LK https://hdl.handle.net/10272/22869
UL https://hdl.handle.net/10272/22869
LA eng
NO Ruiz Cánovas, C., Olías, M. & Nieto, J.M. Metal(loid) Attenuation Processes in an Extremely Acidic River: The Rio Tinto (SW Spain). Water Air Soil Pollut 225, 1795 (2014). https://doi.org/10.1007/s11270-013-1795-7
NO This work has been financed by the Spanish Ministry of Education and Science through project CGL2010-21956-C02. The authors wish to thank the Environmental Council of the Andalusian Regional Government for the information provided for this study. The comments and helpful criticisms of two anonymous reviewers and the support of the Editor-in-chief Dr. Jack T. Trevors have considerably improved the original manuscript and therefore are also gratefully acknowledged.
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026