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Agricultural Contamination of the Surface Waters of the Upper Ouémé in Benin: The Case of Heavy Metals and Pesticides

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Journal of Agricultural Chemistry and Environment 2024年第1期13卷 83-99页

作者： armelle Sabine Yélignan Hounkpatin Nonvignon Martial Fassinou Fadéby Modeste gouissi Zoulkanerou Orou Piami Dossou armel géraldo houndeton Souradjou Orou goura Wakili Bolatito Yessoufou Tayéwo Sylvain Biaou Laboratory of Hygiene Sanitation Toxicology and Environmental Health (HECOTES) The Training Centre Interfacultaire and Environmental Research for Sustainable Development (CIFRED) of the University of Abomey (UAC) Cotonou Benin Plurildisciplinary Research Laboratory for Technical Education (LARPET) of the University of Sciences Technologies Engineering and Mathematics of Abomey (UNSTIM) Lokossa Benin Laboratoire d’Ecologie de Santé et de Productions Animales (LESPA) Faculté d’Agronomie (FA) Université de Parakou (UP) Parakou Bénin

Objective: The main objective of this study was to assess the degree of contamination of surface waters by heavy metals and pesticides. Method: To this end, data were collected in December 2022 from four specific sampling stations: Okpara, Térou, Affon and Adjiro. Levels of heavy metals, including cadmium, chromium, copper, iron, mercury, nickel and lead, were measured and subjected to in-depth statistical analysis using graphical summation models. In addition, the concentrations of pesticide active ingredients present in the samples were interpreted and evaluated. The statistical data collected during this study were processed using R software, version 3.5.0. Results: The values obtained at the different stations Okpara, Térou, Affon and Adjiro are respectively Arsenic (2 × 10-4 mg/L;2.2 × 10-1 mg/L;1.2 × 10-4 mg/L;2 × 10-4 mg/L), Cadmium (4.4 × 10-5 mg/L;1.1 × 10-2 mg/L;10-4 mg/L;4 × 10-4 mg/L). Then Copper (7 × 10-4 mg/L;3 × 10-3 mg/L;7 × 10-4 mg/L;1 × 10-4 mg/L), Iron (1.51 mg/L;6.4 × 10-1 mg/L;2.0012 mg/L;2.9 × 10-1 mg/L), Lead (0 mg/L;0 mg/L;1.5 × 10-3 mg/L;1.5 × 10-3 mg/L). Mercury, nickel and chromium were not detected in surface waters. It is important to note that the values obtained for trace metals (Cadmium, Chromium, Copper, Iron, Mercury, nickel and chromium were not detected in surface waters. It is important to note that the values obtained for trace metals (cadmium, chromium, copper, iron, mercury, nickel and lead) were all below the guideline standards set by the WHO in 2006 for uncontaminated surface waters. This indicates that the surface waters of the Upper Ouémé were below acceptable contamination thresholds in terms of heavy metals. However, the presence of pesticide active ingredients such as cyfluthrin, endosulfan-alpha, endosulfan-beta, profenosfos, tihan, atrazine, g

关键词： Agricultural Contamination Heavy Metals Pesticides Surface Water North Benin

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Antibacterial Activities of the Ethanolic Extract of <i>Crateva adansonii</i>DC. (Capparidaceae) Harvested in Dassa-Zoumèin Central Bénin

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Open Journal of Medical Microbiology 2020年第2期10卷 46-57页

作者： Zinsou Franck Mignanwandé Roch Christian Johnson armelle Sabine Yélignan Hounkpatin gratien Boni armel géraldo houndeton Eustache Enock Houéto Wilfrid Hinnoutondji Kpètèhoto Madjid Olatoundé Amoussa Interfaculty Center for Training and Research in Environment for Sustainable Development (CIFRED) University of Abomey-Calavi Abomey-Calavi Benin Technical Higher Teacher Training School (ENSET) National University of Sciences Technologies Engineering and Mathematics (UNSTIM) Abomey Benin Faculty of Sciences and Technology University of Abomey-Calavi Abomey-Calavi Benin

Objective: The present was initiated to study the antibacterial properties of the Crateva adansonii DC extract on germs commonly identified in skin and digestive infections in Benin as well as the reversion of resista... 详细信息

g>Objective: g>The present was initiated to study the antibacterial properties of the Crateva adansonii DC extract on germs commonly identified in skin and digestive infections in Benin as well as the reversion of resistance to these aforementioned germs. g>Method: g>The bacteria’s sensitivity test to extracts was carried out by the microdilution method in liquid medium as well as the MIC and the reversion of bacterial resistance. For the determination of the MBC, this technique is used coupled with spreading on agar medium. g>Results: g>The results show an antibacterial activity of the extract with MICs between 0.625 - 5 mg/ml. The CMB of Enterococcus faecalis ATCC 29212 is 2.5 mg/ml while that of Methicillin-resistant Staphylococcus aureus and Staphylococcus epidermidis CIP 8039 is 5 mg/ml. The reversion of bacterial resistance has shown a synergy of action between our extract and conventional antibiotics.

关键词： Antibacterial Activity Crateva adansonii Ethanolic Extract Benin

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