Abstract
The leachate produced by the Municipal Solid Waste Landfill of São Pedro da Aldeia (State of Rio de Janeiro, Brazil) flows almost entirely in one direction guided by a natural ditch in the bottom of a gentle valley. This landfill has been in operation with no concern to environmental protection, such as containment systems or leachate drainage and treatment. This inadequate operation causes severe damage to flora, wildlife and local farmers, due to continuous propagation of contaminants in the groundwater. Field and laboratory measurements of ionic concentrations of several contaminants found in the groundwater adjacent the landfill are presented and interpreted in this paper. Several farms are located adjacent to the landfill, comprising about 1,000 inhabitants that use the ground water for personal use and land farming activities. The main purpose of this paper is to assess the environmental hazard to the surrounding properties as the landfill is still in operation. This is accomplished by estimating the maximum distance travelled by the leachate plume based on the statistical interpretation of the measured ionic concentration of several contaminants found commonly in landfills. The main recommendation coming from the statistical assessment is that safe groundwater consumption should be limited to a minimum distance of 400 m from the contamination source, provided that the quality of ground water is continuously monitored while the MSW landfill is still in operation.
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The financial support provided by the Brazilian Scientific agency CNPq and by the program PROCIENCIA of the University of the State of Rio de Janeiro is greatly acknowledged.
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Pacheco, M., Sivakugan, N. & Barbosa, M.C. Statistical Assessment of Unidirectional Propagation of a Leachate Contamination Plume. Geotech Geol Eng 27, 123–135 (2009). https://doi.org/10.1007/s10706-008-9218-z
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DOI: https://doi.org/10.1007/s10706-008-9218-z