[ Caractérisation physico-chimique et bactériologique des eaux souterraines de la ville de Bembèrèkè au Nord-Est du Bénin ]
Volume 23, Issue 1, April 2018, Pages 1–9
Serge Fredys Rodrigue Olawalé SENOU1, Roger Gérard JOSSE2, Rock Modéran TOKLO3, Jacques K. Fatombi4, Nikita Topanou5, and Bruno COULOMB6
1 Laboratoire d’analyse physico-chimique des milieux aquatiques (LAPMIA/FAST/CHIMIE/UAC) BP 526 Cotonou, Benin
2 Laboratoire d'analyse physico-chimique des milieux aquatiques (LAPMIA/FAST/CHIMIE/UAC), BP 526 Cotonou, Benin
3 Laboratoire d’analyse physico-chimique des milieux aquatiques (LAPMIA/FAST/CHIMIE/UAC) BP 526 Cotonou, Benin
4 Faculty of Science and Technology, Natitingou Water and Environmental Chemistry Laboratory, Natitingou, Benin
5 Faculty of Science and Technology, Natitingou Water and Environmental Chemistry Laboratory, Natitingou, Benin
6 Aix-Marseille Université-CNRS, LCE FRE 3416, Marseille, France
Original language: French
Copyright © 2018 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
The objective of this study is to evaluate the quality of underground water according to the standards of Beninese and international drinkability. The choice of watering place centres on daily usages as beverage. The physicochemical and bacteriological parameters have been determined according to the conventional methods. The obtained results show that the studied waters are characterized by an acidic- pH (6.74 – 6.95), a temperature which varies from 27.3°C to 30.4°C, a weak electric conductivity (8.9μS/cm – 588 μS/cm), weak TDS (5mg/L – 270mg/L) and a low potential of reduction-oxidation (202 mV – 344 mV). Besides, the following medium concentrations have been obtained : Sulphate (0.19 mg / L – 36.55 mg / L), Nitrate (4.60 mg / L – 53.28 mg/L), Calcium (0.7 mg/L – 57.46 mg/L), Potassium (0.22 mg/L – 21.02 mg/L), Magnesium (0.01 mg/L – 18.33 mg/L), ammonium (0.02 mg/L – 18.33 mg/L) and Chloride (0.20 mg / L – 55.55 mg/L). Among the studied places, only the well P1 revealed contents in potassium and in nitrate beyond the standards of drinkability. The results of bacteriological analysis confirm the presence in very appreciable numbers of fecal contaminated indicators (Total Coliforms, Fecal Coliforms and Escheriachia-Coli) in the wells except the well P5. Moreover, the Fecal Streptococci have been displayed prominently in the well P6. So at the end of this study, we can deduce that wells studied waters roughly present the serious health risks to the population contrary to the drilling wells and springs water.
Author Keywords: Domestic water, quality, standards of drinkability, physicochemical, bacteriological parameters and Bembèrèkè.
Volume 23, Issue 1, April 2018, Pages 1–9
Serge Fredys Rodrigue Olawalé SENOU1, Roger Gérard JOSSE2, Rock Modéran TOKLO3, Jacques K. Fatombi4, Nikita Topanou5, and Bruno COULOMB6
1 Laboratoire d’analyse physico-chimique des milieux aquatiques (LAPMIA/FAST/CHIMIE/UAC) BP 526 Cotonou, Benin
2 Laboratoire d'analyse physico-chimique des milieux aquatiques (LAPMIA/FAST/CHIMIE/UAC), BP 526 Cotonou, Benin
3 Laboratoire d’analyse physico-chimique des milieux aquatiques (LAPMIA/FAST/CHIMIE/UAC) BP 526 Cotonou, Benin
4 Faculty of Science and Technology, Natitingou Water and Environmental Chemistry Laboratory, Natitingou, Benin
5 Faculty of Science and Technology, Natitingou Water and Environmental Chemistry Laboratory, Natitingou, Benin
6 Aix-Marseille Université-CNRS, LCE FRE 3416, Marseille, France
Original language: French
Copyright © 2018 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
The objective of this study is to evaluate the quality of underground water according to the standards of Beninese and international drinkability. The choice of watering place centres on daily usages as beverage. The physicochemical and bacteriological parameters have been determined according to the conventional methods. The obtained results show that the studied waters are characterized by an acidic- pH (6.74 – 6.95), a temperature which varies from 27.3°C to 30.4°C, a weak electric conductivity (8.9μS/cm – 588 μS/cm), weak TDS (5mg/L – 270mg/L) and a low potential of reduction-oxidation (202 mV – 344 mV). Besides, the following medium concentrations have been obtained : Sulphate (0.19 mg / L – 36.55 mg / L), Nitrate (4.60 mg / L – 53.28 mg/L), Calcium (0.7 mg/L – 57.46 mg/L), Potassium (0.22 mg/L – 21.02 mg/L), Magnesium (0.01 mg/L – 18.33 mg/L), ammonium (0.02 mg/L – 18.33 mg/L) and Chloride (0.20 mg / L – 55.55 mg/L). Among the studied places, only the well P1 revealed contents in potassium and in nitrate beyond the standards of drinkability. The results of bacteriological analysis confirm the presence in very appreciable numbers of fecal contaminated indicators (Total Coliforms, Fecal Coliforms and Escheriachia-Coli) in the wells except the well P5. Moreover, the Fecal Streptococci have been displayed prominently in the well P6. So at the end of this study, we can deduce that wells studied waters roughly present the serious health risks to the population contrary to the drilling wells and springs water.
Author Keywords: Domestic water, quality, standards of drinkability, physicochemical, bacteriological parameters and Bembèrèkè.
Abstract: (french)
La présente étude a pour but d’évaluer la qualité des eaux souterraines de la ville de Bembèrèkè en référence aux normes de potabilité Béninoise et internationale. Le choix des points d’eaux étudiées repose sur leurs usages quotidiens comme eau de consommation. Les paramètres physico-chimiques et bactériologiques ont été déterminés, selon des méthodes conventionnelles. Les résultats obtenus montrent que les eaux étudiées sont caractérisées par un pH acide (6,74 – 6,95), une température variant de 27,3°C à 30,4°C, une faible conductivité électrique (8,9 μS/cm – 588 μS/cm), une faible TDS (5 mg/L – 270 mg/L) et un bas potentiel d’oxydo-réduction (202 mV – 344 mV). En outre, les concentrations moyennes suivantes ont été obtenues : sulfates (0,19 mg/L à 36,55 mg/L), nitrates (4,60 mg/L à 53,28 mg/L), calcium (0,7 mg/L à 57,46 mg/L), potassium (0,22mg/L à 21,02 mg/L), magnésium (0,01 mg/L à 18,33 mg/L), ammonium (0,02 mg/L à 18,33 mg/L) et chlorure (0,20 mg/L à 55,55 mg/L). Parmi ces points étudiés, seul le puits P1 a révélé des teneurs en potassium et en nitrate au-delà des normes de potabilité. Les résultats d’analyses bactériologiques confirment la présence en nombre très appréciable des indicateurs de contamination fécale (Coliformes totaux, coliformes fécaux et Escherichia coli) dans les puits à l’exception du puits P5. Par ailleurs, les streptocoques fécaux ont été mis en évidence dans le puits P6. Ainsi à l’issue de la présente étude nous pouvons déduire que, les eaux des puits étudiés présentent globalement des risques sanitaires sérieux à la population contrairement aux forages et aux sources.
Author Keywords: Eaux de consommation, qualité, paramètres physico-chimiques, microbiologiques et Bembèrèkè.
How to Cite this Article
Serge Fredys Rodrigue Olawalé SENOU, Roger Gérard JOSSE, Rock Modéran TOKLO, Jacques K. Fatombi, Nikita Topanou, and Bruno COULOMB, “Physico-chemical and bacteriological characterization of underground water in Bembèrèkè town in the North-east (Republic of Benin),” International Journal of Innovation and Applied Studies, vol. 23, no. 1, pp. 1–9, April 2018.
