Caractérisation physico-chimique et bactériologique des eaux souterraines de la ville de Bembèrèkè au Nord-Est du Bénin

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 th...

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Bibliographic Details
Published inInternational journal of innovation and applied studies Vol. 23; no. 1; pp. 1 - 9
Main Authors Senou, Serge Fredys Rodrigue Olawalé, Josse, Roger Gérard, Toklo, Rock Modéran, Fatombi, K Jacques, Topanou, Nikita, Coulomb, Bruno
Format Journal Article
LanguageFrench
Published Rabat International Journal of Innovation and Applied Studies 01.04.2018
Subjects
Calcium
Drinking water
E coli
Electrical resistivity
Feces
Nitrates
Oxidation
Population
Potassium
Wells
Madagascar
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Summary: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.
ISSN:2028-9324