Evaluation de la qualité des eaux de surface de la rivière Kadicha

Merhabi, F.; Amine, H.; Halwani, Jalal

doi:10.22453/lsj-020.1.010-034

Cited by 11 publications

(8 citation statements)

References 6 publications

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“…Indeed, this acidity of the waters depends largely on the nature of the land crossed and the discharges transported. This may also be due to a supply of humic and fulvic acids resulting from soil leaching by precipitation (Merhabi et al, 2019). The results obtained at the electrical conductivity level show an elevation downstream.…”

Section: Discussionmentioning

confidence: 86%

Evaluation of Metallic Trace Elements Content (Cadmium, Copper, Zinc and Lead) in the Water of Lake Azili in the Municipality of Zangnanado (Centre-Benin)

Dovonou¹,

Godonou²,

Kindoho³

et al. 2022

GEP

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This study focuses on the assessment of the level of contamination in metallic trace elements (cadmium, copper, zinc and lead) in the waters of lake Azili in the municipality of Zangnanado. The methodology adopted to achieve these results is the method of molecular absorption spectrophotometry. Four sites were sampled at the beginning of November 2020 (period of the long dry season). The results obtained show that the copper content varies between 1.04 mg/l and 1.67 mg/l. The zinc content between 0.2 mg/l to 0.62 mg/l and those of lead recorded are all above 0.05 mg/l. As for their cadmium concentration, they are all above 0.001 mg/l. These results from water analysis of Azili lake show that the sources of this type contamination of the lake are due on the one hand to human activities (dumps of household waste, use of motorized boats) and others other hand to the contributions of the effluents of the lake carrying pesticides. The water quality of Lake Azili is therefore influenced by these various metallic trace elements found there. These results show that the waters of lake Azili are at their beginning of pollution even if it is not yet alarming at the time of our study. Under these conditions, if nothing is done to mitigate it, the pollution will be critical over time.

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Section: Discussionmentioning

confidence: 86%

Evaluation of Metallic Trace Elements Content (Cadmium, Copper, Zinc and Lead) in the Water of Lake Azili in the Municipality of Zangnanado (Centre-Benin)

Dovonou¹,

Godonou²,

Kindoho³

et al. 2022

GEP

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“…Abrupt changes in this parameter lead to a disturbance in the equilibrium of the water ecosystem [1]. According to Merhabi et al [40], surface water temperature is affected by fluctuations in precipitation and seasonal temperatures. The temperature of an underground environment depends on several factors, the most important of which are latitude and altitude [41].…”

Section: Physicochemical Parametersmentioning

confidence: 99%

Relative importance of the bacteria Brucella, Salmonella, Staphylococcus and other indicator bacteria in some mountain farm waters in West-Cameroon (Central Africa) and the potential role of some environmental factors

Bahebeck¹,

Nougang²,

Nana³

et al. 2020

World J. Adv. Res. Rev.

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A bacteriological and physicochemical study was conducted in the waters of farms in mountainous regions of Cameroon. The different water samples were collected during two campaigns in December 2018 and February 2019. Ten stations representing the drinking water supply points in our study area were identified. The results showed that these waters contained both pathogenic and commensal fecal bacteria. The highest abundances reached 10x103 CFU/100mL for Salmonella sp., 72x103 CFU/100mL for Staphylococcus aureus, 102x103 CFU/100mL for Brucella suis and 40x103 CFU/100mL for Brucella abortus. These abundances were subject to space-time fluctuations. Water contamination by tweezers was not general and was present only in surface waters (rivers and ponds). The water in the ponds, rivers and wells analyzed were all basic, with low mineralization on average. The dissolved oxygen ranged from 37.5 to 70.6%, nitrate from 3.7 to 19.8 mg/L and iron from 0.01 to 3.5 mg/L. Most of the physicochemical parameters were relatively stable during the two campaigns. The degree of correlation between the physicochemical parameters and the abundance dynamics of the isolated bacteria was heterogeneous. This was clearly more pronounced with Salmonella sp. and Brucella suis. This would be due to the fraction of metabolically active cells present when the bacteria are exposed to unfavorable conditions. Correlations with the abiotic factors were less marked with Staphylococcus aureus and Brucella abortus; this would be due to their tolerance to environmental stresses.

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“…Ainsi, l'eau, source de vie, peut devenir un danger pour l'environnement et pour les utilisateurs si elle n'est pas de qualité acceptable (Agassounon et al, 2014). Cependant les eaux de surfaces doivent être gérées et protégées en raison de leur vulnérabilité à la surexploitation et à la pollution (Merhabi et al, 2019). Ainsi, entre autres la mauvaise gestion des déchets, l'installation anarchique des latrines influencent la qualité des ressources en eau.…”

Section: Introductionunclassified

Evaluation de la qualité physico-chimique et bactériologique de l’eau du lac Azili dans la commune de Zangnanado au centre du Bénin

Dovonou¹,

Alladassivo²,

Koukpo³

et al. 2022

Int. J. Bio. Chem. Sci

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Un écosystème aquatique sain est primordial pour la vie des produits halieutiques et une alimentation saine de la population. Ce travail se propose de faire une évaluation de la qualité du lac Azili dans la commune de Zangnanado. Les méthodes de spectrophotométrie d’absorption moléculaire et de membrane filtrante pour le dénombrement des germes sont adoptées. L’échantillonnage a été fait en novembre 2020 suivant quatre points (aval, amont, milieu du lac et proximité de l’île). Les résultats obtenus montrent une teneur en azote supérieure à 2 mg/l ; la teneur en phosphores supérieure à 1 mg/l ; la DBO5 varie de 5 à 18 mg/l; la DCO varie de 9.98 à 52.59 mg/l; la teneur en ammonium varie de 0.45 à 0.5 mg/l; la teneur en coliformes thermotolérants varie entre 60 et 3140 CT/100 ml; les teneurs en E. coli et entérocoques fécaux varient de 0 à 20 germes/100 ml. Les résultats issus de cette étude montrent que le lac Azili est à son début de pollution. Cette pollution du lac est due aux activités anthropiques. Des stratégies pour limiter la pollution doivent être mise en place pour éviter le pire dans le futur.

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Evaluation de la qualité des eaux de surface de la rivière Kadicha

Cited by 11 publications

References 6 publications

Evaluation of Metallic Trace Elements Content (Cadmium, Copper, Zinc and Lead) in the Water of Lake Azili in the Municipality of Zangnanado (Centre-Benin)

Evaluation of Metallic Trace Elements Content (Cadmium, Copper, Zinc and Lead) in the Water of Lake Azili in the Municipality of Zangnanado (Centre-Benin)

Relative importance of the bacteria Brucella, Salmonella, Staphylococcus and other indicator bacteria in some mountain farm waters in West-Cameroon (Central Africa) and the potential role of some environmental factors

Evaluation de la qualité physico-chimique et bactériologique de l’eau du lac Azili dans la commune de Zangnanado au centre du Bénin

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