Cyril Okpoli

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2-dimensional electrical resistivity tomography (ERT), microbial and geochemical methods were used as a tool in detection of groundwater contamination at Akure North municipal solid waste–disposal site in Igbatoro road, South Western Nigeria. Six (6) 2D resistivity profiles both around the perimeter and inside the dump were investigated with maximum length of 300 m. Results of the resistivity tomography delineated the leachate plume as low resistivity zones (6 - 33 ohm - m). Results of the physico-chemical analysis of water samples from existing borehole wells reported elevation in concentration of the measured parameters indicating contamination of the groundwater as a result of solid waste leachate accumulation, consequently, complimenting the geophysical data. The microbial analysis of water samples in the same borehole wells reported the presence of some toxic microorganisms such as staphylococcus sp, escherichia coli, streptococcus sp, basillus sp, clostridium sp, mycobacterium sp and micrococcus sp which implies that intake of this water may cause diseases like diarrhea, skin rashes, cancer, liver disease, kidney disease, etc. However, the effect of this dump site is felt on the borehole wells in the environment because of the accumulation and migration of the leachate plumes; therefore,  it is advisable to relocate the dump site from its present location to another site where people have not been resided so as to minimize the environmental impact of this dump on humans and animals.


geophysical, leachate, landfill, geochemical, Igbatoro.

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