Effects of KMnO4 amounts on antibacterial properties of activated carbon for efficient treatment of northern Benin hospital wastewater in a fixed bed column system

Nonfodji, Odilon M.; Fatombi, Jacques K.; Ahoyo, Théodora A.; Boya, Bawa; Baba-Moussa, Lamine; Aminou, Taofiki

doi:10.1016/j.ijheh.2020.113581

Cited by 10 publications

(7 citation statements)

References 30 publications

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“…The level of microbiological pollution of the breeding sites was evaluated by isolation and then culture of total coliforms and Escherichia coli at 37 °C and faecal coliforms at 44 °C. The water was filtered through a 0.45-μm nitrocellulose membrane and the microorganisms cultured on Chromogenic Coliform Agar according to the protocol described by Nonfodji et al [ 33 ].…”

Section: Methodsmentioning

confidence: 99%

Diversity of larval habitats of Anopheles mosquitoes in urban areas of Benin and influence of their physicochemical and bacteriological characteristics on larval density

et al. 2022

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Background The implementation of anti-larval strategies in the fight against malaria vectors requires fundamental knowledge of their oviposition sites. The aim of this study was to assess the spatial and temporal distribution of Anopheles breeding sites as well as the influence of abiotic and biotic factors on the proliferation of larvae in urban and non-urban areas of Benin. Methods Sampling of Anopheles larvae was carried out during the rainy and dry seasons in urbanized and non-urbanized areas of the cities of Cotonou, Bohicon, Parakou, and Natitingou in Benin. The Anopheles larval breeding sites were georeferenced and characterized by their nature, type, physicochemical (pH, temperature, dissolved oxygen, conductivity, turbidity, salinity) and biological attributes (larval density and coliform density). Results A total of 198 positive breeding sites for Anopheles larvae were identified, comprising 163 (82.3%) in the rainy season and 35 (17.7%) in the dry season. Out of these larval habitats, 61.9% were located in urbanized areas, and were predominantly puddles. Principal component analysis revealed a high positive correlation of larval density with temperature and dissolved oxygen, and with salinity in the coastal zone. In addition, cross-sectional analysis of the microbiological results with larval density showed a significant negative correlation between larval productivity and faecal coliform load. Conclusions This study indicated the presence of multiple larval habitats of Anopheles in the urban areas which were created through human activities, and associations between larval density and intrinsic factors of the habitats such as temperature, dissolved oxygen and faecal coliform load. This type of information may be useful for the implementation of appropriate control strategies in urban areas, including regulation of the human activities that lead to the creation of breeding sites, proper environmental management and targeted larvicidal use. Graphical abstract

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Section: Methodsmentioning

confidence: 99%

Diversity of larval habitats of Anopheles mosquitoes in urban areas of Benin and influence of their physicochemical and bacteriological characteristics on larval density

et al. 2022

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“…Bacteriological analyses were performed according to the protocol described by Nonfodji et al [10]. The isolation of total coliforms, Escherichia coli and Enterococcus were carried out at 37˚C using Chromogenic Coliform Agar and Bile-Esculin-Azide agar respectively, while that of Fecal coliforms at 44˚C on Chromogenic Coliform Agar agar.…”

Section: Bacteriological Analysismentioning

confidence: 99%

“…The bacteriological parameters of the hospital wastewater samples collected shown in Table 2, revealed the pollution of wastewater samples by Fecal coliforms, total coliforms, Escherichia coli and Enterococcus. Most of these bacteria isolated from hospital wastewater samples are multi-resistant to commonly prescribed antibiotics in human medicine [10]. The discharge of this wastewater into the environment without any prior treatment could cause contamination of diseases requiring antibiotic treatment in the surrounding populations.…”

Section: Jar-test Proceduresmentioning

confidence: 99%

“…This efficiency of coagulants in the elimination of turbidity would be linked to a charge neutralization mechanism. Indeed, previous work has reported the presence of a cationic protein in Moringa oleifera [10] [26],…”

Section: Effects Of Natural Coagulants On Turbidity Cod and Uv254 Rem...mentioning

confidence: 99%

“…Faced with all these public health problems that can be caused by hospital wastewater, it is, therefore, urgent to propose a purification technology that is less expensive, easy to access and does not require any particular qualification based on the use of local products and having the effectiveness of action on physico-chemical and bacteriological pollution of hospital wastewater. Numerous processes such as coagulation-flocculation [6], adsorption [10], ozonation [11], membrane filtration processes [12], photocatalytic oxidation [13] are used to purify wastewater. Among these methods, the coagulation process is preferentially applied to remove pollutants from water because of its high effectiveness and easiness of application on a wide range of water types [14].…”

Section: Introductionmentioning

confidence: 99%

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Use of Natural Coagulants in Removing Organic Matter, Turbidity and Fecal Bacteria from Hospital Wastewater by Coagulation-Flocculation Process

Tometin¹,

Nonfodji²,

Chouti³

et al. 2022

JWARP

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Hospital wastewater represents an infectious and toxic risk to human health and the environment due to its contents. Most hospitals in developing countries, including Benin, do not have a wastewater treatment plant. In this study, the wastewater from two hospitals in northern Benin was characterized and then treated with Azadirachta indica leaves, Moringa oleifera and Luffa cylindrica seeds by coagulation/flocculation process. The wastewater characteristics showed that the collected samples are greatly polluted by organic matter and fecal bacteria such as Escherichia coli, Enterococcus fecal and Total coliforms. Jar-test results revealed that 95.74%, 78%, 49.19% of turbidity, 51.35%, 38.32%, 22.19% of COD, 93.16%, 85.26%, 83.30% against Escherichia coli, 92.11%, 90.93%, 94.60% against total Coliforms and 99.37%, 91%, 99%, 55.07% against Enterococcus were removed from hospital wastewater using Moringa oleifera, Luffa cylindrica seed and Azadirachta indica leaves respectively at dose of 100 mg/L. The results highlighted that the natural coagulants could be successfully used for the removal of turbidity and fecal bacteria from hospital wastewater.

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Potassium permanganate-based advanced oxidation processes for wastewater decontamination and sludge treatment: A review

Wang

Zheng

Guo

et al. 2023

Chemical Engineering Journal

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Effects of KMnO4 amounts on antibacterial properties of activated carbon for efficient treatment of northern Benin hospital wastewater in a fixed bed column system

Cited by 10 publications

References 30 publications

Diversity of larval habitats of Anopheles mosquitoes in urban areas of Benin and influence of their physicochemical and bacteriological characteristics on larval density

Diversity of larval habitats of Anopheles mosquitoes in urban areas of Benin and influence of their physicochemical and bacteriological characteristics on larval density

Use of Natural Coagulants in Removing Organic Matter, Turbidity and Fecal Bacteria from Hospital Wastewater by Coagulation-Flocculation Process

Potassium permanganate-based advanced oxidation processes for wastewater decontamination and sludge treatment: A review

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