Assessment of acid soils for sanitary landfill in Khana Local Government Area of Rivers State, South – South, Nigeria

Kaananwii Dum Peter(1*), Vincent Mmbue Nwidae(2)
(1) Department of Crop/Soil Science, Faculty of Agriculture, Rivers State University
(2) Department of Crop/Soil Science, Faculty of Agriculture, Rivers State University
(*) Corresponding Author
Abstract
Open dumping of refuse is the order of the day and the collective method for discarding municipal solid waste and, the inefficient way of handling waste coupled with poor planning of landfill has resulted to environmental pollution and land degradation Thus, it is imperative that in the recognition of the municipal solid waste removal, sanitary landfill is required for proper disposal of municipal waste. This, study was therefore, carried out to assess the soils of Beeri in Khana Local Government Area for sanitary landfill. Three soil map units (pedons) based on vegetation, toposequence and drainage were identified and delineated in the study area. A modal soil profile of 2m x 2 m x 2m dimensions was dug in the identified soil map units and the genetic horizons were labeled and sampled for laboratory analysis. Results obtained revealed that sand fractions varied from 804 gkgin horizon-B of pedon 2 to 924 g/kg in pedon 1and silt content varied between 14 gkgin horizon-AB of pedon 3 to 24 g/kg in B-horizon of pedons 1 and 2 and clay content decreased from 172 gkgin B-horizon of pedon 2 to 52g/kg in pedon 1. Bulk density decreased from 0.935 gcm-3in horizon-Ah of pedon 1 to 1.4550 gcm-3 in B–horizon of pedon 2. Soil pH ranged from strongly acidic 4.89 in AB-horizon of pedon 2 to slightly acidic 5.47 in Bw-horizon of pedon1. Effective cation exchange capacity decreased from10.86 cmolkg-1 in pedon 2 to 2.84 cmol/kg in pedon 3. Soil suitability assessment of the study area indicated that the soils were not suitable (N) for the construction and operation of sanitary landfill as a result of defects in soil texture, high sand and low clay contents, porosity and low ECEC. Thus, efforts should be put in place to improve on the texture, bulk density, porosity and ECEC through management practices most appropriate to improve soil physical and chemical properties and that attribute may classified them from moderate to high suitability for sanitary landfill.
Keywords
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