Evolución de la carga metálica en un tramo del río Odiel afectado por drenaje ácido de minas (provincia de Huelva)
- J. Riera
- M. Olías
- C. Ruiz-Cánovas
ISSN: 0213-683X
Year of publication: 2016
Issue Title: Comunicaciones presentadas en la LX Sesión Científica / Barcelona, 20 de Mayo de 2016
Issue: 60
Pages: 67-70
Type: Article
More publications in: Geogaceta
Abstract
This work quantifies the impact of the first acid mine discharges to the Odiel River and studies the variation of the dissolved and particulate pollutant load. The acid mine discharges cause the progressive deterioration of the river water quality, resulting in processes that favor the precipitation of the non-conservative elements (Fe, Al, As or Pb), while the more soluble ones (Mn, Co or Ni) remain in solution. Cu and Zn have an intermediate behavior due to be affected by sorption/coprecipitation processes. The dissolved pollutant load at the end of the reach is around 5000 kg/day of Al, 1900 kg/day of Fe, 860 kg/day of Zn, 643 kg/day of Mn, 385 kg/day of Cu and lower amounts of other metals. The total metal load may be up to 21 times the dissolve load in the case of Fe and among 3-4 times for As and Pb.