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Geochemical evaluation of suitability of sites for hazardous waste disposal: A case study of recent and old waste-disposal sites in Calabar Municipality, SE Nigeria

Geochemical evaluation of suitability of sites for hazardous waste disposal: A case study of recent and old waste-disposal sites in Calabar Municipality, SE Nigeria

Environmental Geology 39(11): 1286-1294

Two waste-disposal sites (old and new) in Calabar Municipality, SE Nigeria were evaluated to assess their suitability as landfill sites and their impact on the groundwater. The field investigation included surface geological/hydrogeological and geochemical studies. Leachate and groundwater were sampled and analysed for 3 months (April, May and June, 1997) for geochemical characterisation. The results indicate that the two waste-disposal sites in the Calabar Municipality do not meet the requirements as landfill sites. Physico-chemical analyses for temperature, pH, conductivity, dissolved oxygen, biological oxygen demand after 5 days of incubation (BOD5), sulphate, nitrates, nitrite, trace and major elements in the leachate known to impact human health and the environment, indicate high levels of pollution. The values for groundwater in the vicinity of the disposal sites were found to be within the World Health Organisation (WHO) permissible limit.

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Accession: 010714098

Download citation: RISBibTeXText

DOI: 10.1007/s002540000114

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