Assessment of groundwater contamination by leachate near a municipal solid waste landfill
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Date
2011
Journal Title
Journal ISSN
Volume Title
Publisher
African Journal of Environmental Science and Technology
Abstract
Physico-chemical and microbiological parameters were analyzed in leachate and groundwater samples
obtained at different locations adjacent to a municipal solid waste landfill in order to assess the impact
of leachate percolation on groundwater quality. Total dissolved solids (TDS), electrical conductivity
(EC), and Na+ exceeded the World Health Organization (WHO) tolerance levels for drinking water in 62.5,
100, and 37.5% of the groundwater samples, respectively with pH and Fe exceeding WHO limits in 75%
of the samples. Significant negative correlations of -0.839, -0.590, and -0.590 were shown by Na+, TDS,
and EC respectively to distance from landfill. A high population of Enterobacteriaceae ranging from 4.0
× 103 ± 0 to 1.0575 × 106 ± 162,705 CFU/ml was also detected in the groundwater samples, indicating
contamination. The results show that the leachate from the landfill has a minimal impact on the
groundwater resource and this can be attributed to the existing soil stratigraphy at the site consisting
of clay which is deduced to have a significant influence on the natural attenuation of leachate into
groundwater.
Description
Keywords
Groundwater, correlation, percolation, landfill, leachate, municipal solid waste, natural attenuation
Citation
Aderemi, A. O., Oriaku, A. V., Adewumi, G. A., & Otitoloju, A. A. (2011). Assessment of groundwater contamination by leachate near a municipal solid waste landfill. African Journal of Environmental Science and Technology, 5(11), 933-940.DOI: 10.5897/AJEST11.272