Geological Characterization and Environmental Implications of the Placement of the Morelia Dump, Michoacán, Central Mexico

Abstract The landfill of Morelia, the capital city of the state of Michoacán in central-western Mexico, is located 12 km west of the city and has operated since 1997 without a structure engineered and designed to control the generation in situ of biogas and leachates. A geological evaluation of the landfill site is presented in this paper. The results indicate that the site lacks ideal impermeable sub-surface strata. The subsurface strata consist of highly fractured basaltic lava flows (east-west fault and fracture system trend) and sand-size cineritic material with high permeability and porosity. Geochemical analysis of groundwater from Morelia’s municipal aquifer shows a high concentration of heavy metals (Cd, Pb, As) exceeding the Mexican environmental regulations, along with the presence of some organic pollutants (phenols). Analyses of samples of the landfill’s permanent leachate ponds show very high concentrations of the same contaminants. Samples were taken from the leachate pond and from nearby water-wells during the rainy season (summer 1997) and the dry season (spring 1997, 1998, and 1999). In all cases, the concentration of contaminants registered exceeded the standards for drinking water of the World Health Organization (American Public Health Association, American Water Works Association, and Water Pollution Control Federation, 2000). Some metal contaminants could be leaching directly from the landfill.

[1]  O Buenrostro,et al.  Urban solid waste generation and disposal in Mexico: a case study , 2001, Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA.

[2]  O. Buenrostro,et al.  Solid waste management in municipalities in Mexico: goals and perspectives , 2003 .

[3]  Margarita López Martínez,et al.  Quaternary intra-arc extension in the central Trans-Mexican volcanic belt , 2001 .

[4]  Norma Oficial,et al.  Norma Oficial Mexicana NOM-127-SSA1-1994, Salud ambiental, agua para uso y consumo humano-Límites permisibles de calidad y tratamientos a que debe someterse el agua para su potabilización , 2001 .

[5]  H. Lanier Hickman,et al.  Solid Waste Association of North America , 1992, Environmental Conservation.

[6]  L. Evans,et al.  Elemental composition and speciation of some landfill leachates with particular reference to cadmium , 1991 .

[7]  D. J. Hagerty,et al.  Solid Waste Management , 2020, Concise Handbook of Waste Treatment Technologies.

[8]  Timo Assmuth,et al.  Ground water contamination at Finnish landfills , 1993 .

[9]  V. Garduño-Monroy,et al.  Lacustrine record in a volcanic intra-arc setting: the evolution of the Late Neogene Cuitzeo basin system (central-western Mexico, Michoacán) , 1999 .

[10]  Haluk Akgün.  Lined waste containment systems: a method for design and performance evaluation , 1997 .

[11]  Jerome O. Nriagu,et al.  Dispersion and toxicity of metals from abandoned gold mine tailings at Goldenville, Nova Scotia, Canada , 1999 .

[12]  R. Quigley,et al.  Pollutant migration from two sanitary landfill sites near Sarnia, Ontario , 1977 .

[13]  Ellis L. Krinitzsky,et al.  Earthquake safety evaluation of sanitary landfills , 1997 .

[14]  Paul F. Hudak.  A method for designing configurations of nested monitoring wells near landfills , 1998 .

[15]  William Hogland,et al.  Water balance for landfills of different age , 1994 .

[16]  E. GÖktÜrk,et al.  Mineralogical and sorption characteristics of Ankara Clay as a landfill liner , 2003 .

[17]  D. Mackay,et al.  Potential for groundwater contamination in Mexico City , 1993 .