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Assessment of soils for sanitary landfills in Abia State, Southeast Nigeria
Abstract
Open dumping is the common procedure for final disposal of municipal solid waste (MSW) in Nigeria. Consequent upon poor planning of landfills, several environmental pollution and soil degradation problems often occur. Therefore, recognition of the MSW landfill is required to prevent environmental problems. The study was conducted to evaluate the suitability of selected soils of Abia State for the construction of sanitary landfills. Eight profile pits were excavated in different locations and the genetic horizons sampled for laboratory analyses of some selected soil properties. Results showed that the sand fraction ranged from 718 to 825gkg-1, with a mean value of 762gkg-1 and the clay content ranged between 116 and 213gkg-1, with a mean value of 174gkg-1. Bulk density ranged from 1.17 to 1.48gcm-3, with an average value of 1.40gcm-3. Hydraulic conductivity ranged from 25.3 to 45.7cmhr-1, with an average value of 38.cmhr-1. Permeability ranged between 0.88 and 1.40cm2, with a mean of 1.13 cm2. Soil pH (H2O) ranged from 4.35 to 5.38, with a mean value of 4.98. Effective cation exchange capacity ranged from 3.81- 17.17cmolkg-1, with an average value of 6.83cmolkg-1. The suitability assessment showed that the soils are fairly to marginally suitable for the construction and operation of sanitary landfills.
