Mamadou Faye, Mouhamed Ndoye, Ibrahima Diouf and Mar Codou Guèye Diop
J. Chem. Res. Adv., 03 (02):21-28
Mamadou Faye : Cheikh Anta Diop University, Dakar-Fann, Senegal
Mouhamed Ndoye : Cheikh Anta Diop University, Dakar-Fann, Senegal
Ibrahima Diouf : Cheikh Anta Diop University, Dakar-Fann, Senegal
Mar Codou Guèye Diop : Cheikh Anta Diop University, Dakar-Fann, Senegal
Aim: This study was aimed to correlate the physical and chemical parameters of groundwater samples with respect to the different sampling areas and to assess their representativeness.
Method and Materials: Two physical and chemical parameters (pH, electrical conductivity) were measured in-situ, immediately after sample collection. pH was measured in the field using a Radiometer Analytical pHM201 portable pH meter and in the laboratory using a Hanna pH209 laboratory pH meter. Conductivity and turbidity was also measured. Principal Component Analysis (PCA) and the Hierarchical Ascending Classification (HAC) of the statistical analysis tool (STATISTICA Application) on the results of physical and chemical analyzes in order to better interpret the different parameters
Results: The Examination of the correlation matrix clearly shows that pH and sulphate ions (SO42-) have negative correlations with nitrate ions (NO3-) and total iron, respectively (-0.46) and (-0.22). Factors correlated in its negative part with parameters such as chloride ions (Cl-), conductivity, sulphate ions (SO42-), and magnesium ions (Mg2+) and to a lesser degree with pH, calcium ions (Ca2+) and manganese (Mn2+).
Conclusion: It was concluded that groundwater has a slightly acidic pH and is highly mineralized. Indeed, the data analysis showed globally that mineralization is essentially controlled by nitrate and nitrite ions (NO3- and NO2-), chlorides (Cl-), sulphates (SO4²-) and iron (total iron).