Environmental Science and Pollution Research

, Volume 23, Issue 7, pp 6014–6023

Impact of acid mine drainages on surficial waters of an abandoned mining site

  • M L García-Lorenzo
  • J. Marimón
  • M C Navarro-Hervás
  • C. Pérez-Sirvent
  • M J Martínez-Sánchez
  • José Molina-Ruiz
Contamination related to anthropic activities. Characterization and remediation

DOI: 10.1007/s11356-015-5337-2

Cite this article as:
García-Lorenzo, M.L., Marimón, J., Navarro-Hervás, M.C. et al. Environ Sci Pollut Res (2016) 23: 6014. doi:10.1007/s11356-015-5337-2

Abstract

Weathering of sulphide minerals produces a great variety of efflorescences of soluble sulphate salts. These minerals play an important role for environmental pollution, since they can be either a sink or a source for acidity and trace elements. This paper aims to characterise surface waters affected by mining activities in the Sierra Minera of Cartagena-La Union (SE, Spain). Water samples were analysed for trace metals (Zn, Cd, Pb, Cu, As and Fe), major ions (Na+, K+, Ca2+ and Mg2+) and anions (F, Cl, NO3, CO32−, SO42−) concentrations and were submitted to an “evaporation-precipitation” experiment that consisted in identifying the salts resulting from the evaporation of the water aliquots sampled onsite. Mineralogy of the salts was studied using X-ray diffraction and compared with the results of calculations using VISUAL MINTEQ. The study area is heavily polluted as a result of historical mining and processing activities that has produced large amount of wastes characterised by a high trace elements content, acidic pH and containing minerals resulting from the supergene alteration of the raw materials. The mineralogical study of the efflorescences obtained from waters shows that magnesium, zinc, iron and aluminium sulphates predominate in the acid mine drainage precipitates. Minerals of the hexahydrite group have been quantified together with minerals of the rozenite group, alunogen and other phases such as coquimbite and copiapite. Calcium sulphates correspond exclusively to gypsum. In a semiarid climate, such as that of the study area, these minerals contribute to understand the response of the system to episodic rainfall events. MINTEQ model could be used for the analysis of waters affected by mining activities but simulation of evaporation gives more realistic results considering that MINTEQ does not consider soluble hydrated salts.

Keywords

Acid mine drainage Sulphate efflorescences Trace elements Mining activity Environmental minerals X-ray diffraction 

Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • M L García-Lorenzo
    • 1
  • J. Marimón
    • 2
  • M C Navarro-Hervás
    • 2
  • C. Pérez-Sirvent
    • 2
  • M J Martínez-Sánchez
    • 2
  • José Molina-Ruiz
    • 3
  1. 1.Department of Petrology and Geochemistry, Faculty of GeologyUniversity Complutense of MadridMadridSpain
  2. 2.Department of Agricultural Chemistry, Geology and Pedology, Faculty of ChemistryUniversity of MurciaMurciaSpain
  3. 3.Department of Physical Geography, Human Geography and Regional Geographical Analysis, Faculty of GeographyUniversity of MurciaMurciaSpain

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