Study Of Metals In Leached Soils Of A Municipal
Dumpsite In Tampico, Tamaulipas, Mexico:
Preliminary Results
Author(s)
P. F. Rodríguez-Espinosa, D. Chazaro Mendoza,
J. A. Montes de Oca, G. Sánchez Torres E. & A. Fierro Cabo A.
Abstract
The Zapote dumpsite measures 420000 m 2 and is 28 years old; an estimated 2.5
millions tons of waste have accumulated on the site (household waste, clinical
waste, commercial waste). The thickness of the waste is 3 to 9 meters. Since
operations began, no control regulations have existed on the residues received. The
Zapote dumpsite is located within a salt-marsh between a system of channels and
river lagoons of brackish water, located in a tropical sedimentary environment in
the urban zone of Tampico, Tamaulipas, Mexico. Recently, the Zapote has been
closed and work is presently underway in its rehabilitation since a geo-environmental
perspective. The present investigation integrates information of
preliminary results of metals (Pb, Ni, Cd, Cu, Mg, Fe and Al) contained in
sediments that underlie the Zapote dumpsite. In laboratory research the metals of
the sediment were correlated with the metals contained in samples of leachate from
the Zapote dumpsite. The concentration of metals Pb, Ni, Cd, Cu, Mg, Fe and Al
were analyzed in samples of sediments that underlie the body of the dumpsite in
layers of 10 cm, reaching a depth of 1.5 m under the interface waste-soil. The
results denote high concentrations of metals in layers that are in contact with waste
that decreased until reaching 60 to 80 cm of depth. The proportions of the
concentrations of metals studied in the soil are comparable with that leached, until
layers of 60 to 80 cm of depth are reached, and are then lost in the deepest layers.
The high plastic characteristics of clay layers have stood in the way of metallic
contaminants in sub layers of the Zapote dumpsite. The results were correlated
with metal concentrations of natural and anthropogenic sediments of the region.
Keywords: metals in soils, sediments in a dumpsite, metal concentration.
Keywords
metals in soils, sediments in a dumpsite, metal concentration.
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