Evaluation of physicochemical and bacteriological pollution of some water bodies of Franceville (Gabon)
Paper Details
Evaluation of physicochemical and bacteriological pollution of some water bodies of Franceville (Gabon)
Abstract
The city of Franceville is irrigated by two main water bodies : the M’Passa and the Ogooué Rivers; these water sources are subjected to anthropogenic pollution. Therefore, we decided to evaluate the quality of these water bodies using physicochemical and bacteriological parameters. Physicochemical parameters were measured in situ using the HANNA 9828 multiparameter. Phosphate, sulfate, and ammonium concentrations were determined by spectrophotometric analysis. Total coliform and Escherichia coli were enumerated simultaneously on selective media, namely Eosin methylene blue (EMB), MacConkey and m-Endo agar. Presumptive E. coli isolates were identified by biochemical tests. The results of the physicochemical analysis revealed that the temperature, the conductivity, and dissolved oxygen percent were within the normal ranges. The pH of the M’Passa River was acid with values of 6.20±0.58 and 6.09±0.42 for M’Passa 1 and M’Passa 2, respectively, suggesting that the water was polluted; while the pH of the Ogooué River was neutral (7.01±0.46). Phosphate, sulfate, and ammonium concentrations were low. High levels of total coliform and E. coli were found in all water samples suggesting that they were contaminated with bacteria, with samples of the Ogooué being more polluted. Biochemical analysis detected the presence of Yersinia enterocolitica and Klebsiela pneumoniae, whereas no E. coli isolate was identified. This study of water Bodies of Franceville shows that there is no physicochemical pollution. However, all water samples contained bacteria and could therefore pose a health threat to the local population.
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Jean-Fabrice Yala, Hilaire Kenguele Moundounga, Arnaud Brice Pambo-Pambo, Rolande Mabika Mabika, Elvis Same Minko, Alexis Nicaise Lepengué, Et Alain Souza (2017), Evaluation of physicochemical and bacteriological pollution of some water bodies of Franceville (Gabon); JBES, V11, N5, November, P365-375
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