Geochemical behavior of heavy metals in a Zn-Pb-Cu mining area in the State of Mexico (central Mexico).
The geochemical behavior of zinc, lead and copper from sulfidic tailings in a mine site with potential to generate acidic drainage (pyrite (55%) and sphalerite (2%)) is reported in this paper. The mining area is divided in two zones, considering the topographic location of sampling points with respect to the tailings pile: (a) outer zone, out of the probable influence of acid mine drainage (AMD) pollution, and (b) inner zone, probably influenced by AMD pollution. Maximum total ions concentrations (mg/L) measured in superficial waters found were, in the outer zone: As (0.2), Cd (0.9), Fe (19), Mn (39), Pb (5.02), SO4(2-) (4650), Zn (107.67), and in the inner zone are As (0.1), Cd (0.2), Fe (88), Mn (13), Pb (6), SO4(2-) (4,880), Zn (46). The presence of these ions that exceeding the permissible maximum limits for human consume, could be associated to tailings mineralogy and acid leachates generated in tailings pile.
Lizárraga-Mendiola
L
L
Earth Sciences Posgraduate Program, Institute of Geophysics, National Autonomous University of Mexico, Coyoacán, C.P. 04510, Mexico, Mexico. lililga@gmx.net
González-Sandoval
M R
MR
Durán-Domínguez
M C
MC
Márquez-Herrera
C
C
D003300:Copper; D004784:Environmental Monitoring; D007854:Lead; D019216:Metals, Heavy / Q000032:analysis*; D008800:Mexico; D008906:Mining; D014874:Water Pollutants, Chemical / Q000032:analysis*; D015032:Zinc
D019216:Metals, Heavy; D014874:Water Pollutants, Chemical; D007854:Lead; D003300:Copper; D015032:Zinc