Abstract
The study was conducted to evaluate the physic-chemical parameters and pollution aspect of landfill soils. The soils samples were collected in some selected landfill, at Ouagadougou. Determinations of heavy metal concentrations, physic-chemical parameters, calculation of geo-accumulation index and statistical analysis were undertaken. The atomic absorption spectrophotometer was used to determine the concentrations of heavy metals (Cr, Mn, Fe, Ni, Cu, Zn, As, Cd, Hg, and Pb) in the soils samples. This study reveals that the studied landfill contribute to increase the concentration of heavy metals (Cr, Mn, Fe, Ni, Cu, Zn, As, Hg and Pb) in soils. The pH KCl of the studied landfill soils were less than 7, which reflects the acidic nature of the landfill soils. The Landfills soils were classified between ‘practically uncontaminated’, ‘Uncontaminated to Moderate’ and ‘Moderate’. The geoaccumulation of Cr, Mn, Fe, Ni, and As were less than one for the studied landfills. The classifications show that the landfill soil from KARPALA and DAGNOIN were the moderate polluted with Cu, Zn and Pb. The Cu, Zn and Pb were metal that contribute more in the pollution in the landfill soil at Ouagadougou. Statistical study reveals that increasing total organic matter tends to decrease the concentrations of manganese, zinc, copper and lead.
Highlights
In Burkina Faso, the rapid demographic evolution of the agglomeration continues to exacerbate the problems of housing expansion in the capital
Concentration of Heavy Metals in the Soil of the Landfills Studied (As), cadmium (Cd) and lead (Pb); 3)Hydride generation (FIAS) or cold vapor was used for the analysis of mercury (Hg)
16.48 ppm and measured in the soils of the University of In conclusion, this study reveals that the studied landfills
Summary
In Burkina Faso, the rapid demographic evolution of the agglomeration continues to exacerbate the problems of housing expansion in the capital. The amount of household waste has increased in recent decades due to accelerated population growth. This phenomenon is more critical in developing countries which do not have the resources to properly manage waste. Lower than the background concentration which was set at Landfills contribute to increased chromium concentration in 317.15 ppm. Manganese: the average manganese concentration was Arsenic: the discharges studied all contribute to the between 505.43 ppm to 1051.58 ppm. The background evolution of the concentration of arsenic in the soils because concentration was 260.95 ppm and very low than the the measurements obtained in this study was lower than that manganese concentration; which reflects a strong of the concentration background (3.68 ppm)
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