
[Resumen] Se analizan los mecanismos de oxidación de pirita, considerando las diferentes vías de evolución admitidas en la bibliografía, la influencia de las condiciones del medio (Eh, pH, microorganismos, etc.), la naturaleza de los productos formados y su potencial acidificante en distintas condiciones. Como ejemplo se presentan datos obtenidos en el estudio de dos explotaciones mineras en rocas anfibolíticas ricas en sulfuros de las proximidades de Santiago de Compostela. Se concluye la necesidad del conocimiento de estos procesos para una mejor planificación de las medidas de control del impacto ambiental en suelos, aguas y organismos, así como de los procedimientos más adecuados para la recuperación de escombreras y «suelos de mina».
[Abstract] Some aspects of pyrite oxidation mechanism such as the evolution pathways recognized in the literature, the influence of environmental conditions (Eh, pH, microorganism, etc.), nature of formed products and acidifying potential under different conditions are revised. As an example, the results obtained in a study of two mines in sulphide rich amphibolitic rocks near Santiago de Compostela, are included. It is concluded the need of the knowledge of these processes in order to improve the planification of the methods to control environmental iropacts in soils, waters and organisms, as well as to establish the most suitable procedures for waste materials and minesoils reclamation.
Acidification, pH-EH conditions, Acidificación, Pyrite oxidation, Oxidación de pirita, Condiciones de pH-EH
Acidification, pH-EH conditions, Acidificación, Pyrite oxidation, Oxidación de pirita, Condiciones de pH-EH
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