Caractérisation physico-chimique d’un système lotique en région tropicale : la rivière Sô au Sud- Bénin, Afrique de l’Ouest.

Koudenoukpo, Zinsou Cosme; Chikou, Antoine; Adandedjan, Delphine; Hazoume, Rodrigue; Karim, Issaka Youssao Abdou; Mensah, Guy Apollinaire; Laleye, Anatole

doi:10.4314/jab.v113i1.1

Cited by 10 publications

(15 citation statements)

References 2 publications

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“…Furthermore, the average amount of electric conductivity was 355, 25 µS/cm. That value is lower than data reported by Dimon et al (2014) and Koudenoukpo (2017). The lake was moderately mineralized and the Electric Conductivity is near to the WHO standard.…”

Section: Discussioncontrasting

confidence: 60%

“…The average nitrate value (0.18 mg/l) was superior regarding the limit of French standard (0.01 mg/l). It shows the pollution Koudenoukpo (2017) data in the Sô river and Dimon et al (2014) value (3 mg/l of nitrate) respectively 2.06 mg/l and 0.05 mg/l which were high as compared to limit of French standard (1 mg/l: total phosphorus (1 mg/l) and orthophosphate (0.1 mg/l). So Toho Lake was polluted by phosphorus, effect of eutrophisation and complication of aquatic respiration when phosphorus was combined to the nitrate which leads to the lack of oxygen.…”

Section: Discussionmentioning

confidence: 71%

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Assessment of Some Heavy Metals in Fresh Fish (Oreochromis aureus): Case of Toho Lake in South Eastern Benin, West Africa

Topanou¹,

Gbaguidi²,

Essegbemon³

et al. 2020

GEP

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The protection of aquatic ecosystems is of great importance to maintain the biological balance necessary to secure healthy foods therein imbedded. Toho Lake, located to the south east of Benin, is threatened by pollution emanating from anthropogenic activities with the use of chemical fertilizers, effluent of domestic waste, particularly human and animal excrement with neighbourhood effluents. This study aimed at assessing some heavy metals in fresh fish (Oreochromis aureus) of Toho Lake in order to secure healthy food for the population and protect the ecosystem. Samples of water and fishes were collected and analyzed by HACH DR 3900 after treatment. Results revealed a mean oxygenation of water (4.95 mgo 2 /l), Biochemical Oxygen Demand (21.5 mgo 2 /l), Chemical oxygen Demand (149, 39 mg/l) with the nitrogen in Nitrate (NO 3 : 0.18 mg/l), ammonium nitrate (N-NH + 4 : 0.47 mg/l), and phosphorous (2.06 mg/l) to be very high. The highest contents of heavy metals obtained in the fresh fish were cadmium (32.25 mg/kg), copper (115 mg/kg), lead (8.25 mg/kg), and zinc (90.75 mg/kg) and revealed that the fishes of Toho lake were polluted. The finding allowed us to conclude that the pollution of the lake and the fish carnage are due to anthropogenic pollution through chemicals spilling. Some protection methods of the lake and ecosystem are proposed in order to keep the fish safe and protect the well-being of the population.

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Section: Discussioncontrasting

confidence: 60%

Section: Discussionmentioning

confidence: 71%

Assessment of Some Heavy Metals in Fresh Fish (Oreochromis aureus): Case of Toho Lake in South Eastern Benin, West Africa

Topanou¹,

Gbaguidi²,

Essegbemon³

et al. 2020

GEP

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“…Les mesures et prélèvements des eaux ont été faits entre 06h30mn à 10h45mn (Koudenoukpo et al,2017). Nous avons effectué une recherche systématique sur quinze (15) paramètres physico-chimiques à raison de quatre (04) paramètres physiques tels que : La température, le pH, la conductivité électrique et le solide totaux dissous.…”

Section: Collecte Des Données 241 Mesures Et Prélèvement Des Paramètr...unclassified

Qualité Physico-chimique des Eaux de Surface de l’Ouémé Supérieur au Bénin

Fassinou

Gouissi²,

Goura³

et al. 2023

ESJ

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Le présent travail vise à apprécier la qualité physico-chimique des eaux de l’Ouémé supérieur au Bénin. L’étude concerne Quatre (04) communes. Les données ont été collectées en Octobre 2021 et en Mars 2022. Les paramètres physiques in-situ et les paramètres chimiques au laboratoire ont été étudiés. La description par les box plots (Boîtes à moustaches), le test de Shapiro-Wilk et celui de Kruskall Wallis au seuil α = 5% ont été utilisés. Les paramètres tels la salinité, °C, , , , , Ca2+, Mg2+, Fe2+ et le Cl- sont significativement différents des autres paramètres et ne respectent pas les normes des eaux de surface. Les résultats de la Classification Hiérarchique Ascendante (CAH) ont permis d’identifier trois groupes. Le groupe 1, constitué de : pH, OD, Salinité, , , , , Ca2+, Mg2+, Fe2+ et le Cl- ; proviennent principalement des activités agricoles et des eaux usées. Le groupe 2, constitué de : °C, STD et la DCO ; proviennent des différents éléments chimiques solubles dans l’eau. Le groupe 3, constitué de : CE, provient de la minéralisation globale de l’eau. L'eau est alors contaminée à travers les constituants physico-chimiques évalués. This work aims to assess the physico-chemical quality of the waters of the upper Ouémé in Benin. The study covered four (04) communes. The data was collected in October 2021 and March 2022. The in-situ physical parameters and the chemical parameters in the laboratory were studied. The description by the box plots, the Shapiro-Wilk test and the Kruskall Wallis test at the threshold α = 5% were used. The parameters such as salinity, , , , , Ca2+, Mg2+, Fe2+ and the Cl- are significantly different from the other parameters and do not respect the standards of the surface water. The results of the Hierarchical Ascending Classification (HAC) have helped us to identify three groups. The group 1, made up of: pH, DO, Salinity, , , , , Ca2+, Mg2+, Fe2+ and the Cl-; come mainly from agricultural activities and wastewater. The group 2, made up of: °C, STD and COD; come from the different chemical elements that are soluble in water. The group 3, made up of: CE, comes from the global mineralization of water. The water is then contaminated through the physico-chemical constituents which have been evaluated.

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“…The Ouémé delta [22]. These values are much lower than the values reported on the Sô River [25], but they are higher than those obtained on the Ogba River in Nigeria [27]. Mean values of conductivity and TDS increase with decreasing altitude and are within the range that characterizes natural water [24].…”

Section: Physico-chemical Quality Of Affon Rivermentioning

confidence: 99%

Abundance and Distribution of Macroinvertebrates of the Affon River in Bénin

Samon¹,

Gouissi²,

Adje³

et al. 2019

OJMS

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This study focuses on the biodiversity of macroinvertebrates of the Affon River. To reach this goal, eight stations were sampled and physical parameters such as temperature, pH, conductivity, transparency, depth, total dissolved solids (TDS) and dissolved oxygen were measured. Chemical parameters such as ammonium nitrite and phosphate were measured in the laboratory. We identified 9755 macroinvertebrates belonging to 4 classes, 14 orders, and 49 families. Chironomidae were the most abundant family whereas other sensitive insect's orders such as Ephemeroptera, Trichoptera, and Plecoptera were rarely found, suggesting a poor water quality of the Affon River. The principal components analysis yielded three groups of stations: the first group (Tenéka 2 and 3) characterized by high values of ammonium and phosphate and low values of conductivity and TDS; the second group (Tanéka 1 and Kolokondé 1) with low values of pH, transparency, ammonium and phosphate; and the third group of stations (Kolokondé 2, Kpébouko1, Kpébouko 2, and Affon) marked by high values of conductivity, TDS, transparency, depth and temperature. This study is a crucial step for any management and monitoring of the Affon River.

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Caractérisation physico-chimique d’un système lotique en région tropicale : la rivière Sô au Sud- Bénin, Afrique de l’Ouest.

Cited by 10 publications

References 2 publications

Assessment of Some Heavy Metals in Fresh Fish (Oreochromis aureus): Case of Toho Lake in South Eastern Benin, West Africa

Assessment of Some Heavy Metals in Fresh Fish (Oreochromis aureus): Case of Toho Lake in South Eastern Benin, West Africa

Qualité Physico-chimique des Eaux de Surface de l’Ouémé Supérieur au Bénin

Abundance and Distribution of Macroinvertebrates of the Affon River in Bénin

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Caractérisation physico-chimique d’un système lotique en région tropicale : la rivière Sô au Sud- Bénin, Afrique de l’Ouest.

Cited by 10 publications

References 2 publications

Assessment of Some Heavy Metals in Fresh Fish (Oreochromis aureus): Case of Toho Lake in South Eastern Benin, West Africa

Assessment of Some Heavy Metals in Fresh Fish (Oreochromis aureus): Case of Toho Lake in South Eastern Benin, West Africa

Qualité Physico-chimique des Eaux de Surface de l’Ouémé Supérieur au Bénin

Abundance and Distribution of Macroinvertebrates of the Affon River in B&#233;nin

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Product

Resources

About

Abundance and Distribution of Macroinvertebrates of the Affon River in Bénin