Coulibaly Lacina

• PhD
• Vice President at Université Nangui Abrogoua

Human dejections and agro-pastoral residues biogas potentials of the Comoé river catchment (CRC) were evaluated using agricultural and population statistics, and the indices of residues biogas productivity. The CRC contains an annual biogas volume of 318x106m3. This energy resource is by far higher than the energy needs of rural population in Côte...

Aims: Access to adequate water and sanitation services for all is a major issue in developing countries, particularly in rural mountainous areas. The aim of this study was to examine water access and sanitation conditions in the department of Biankouma, Côte d'Ivoire. Place and Duration of Study: The research was conducted from April to June 2023 i...

Aims: Inadequate wastewater management combined with a lack of sanitation facilities has exacerbated sanitation problems in Sub-Saharan Africa. The aim of this study is to assess wastewater and excreta management in villages of Braffédon, Lahou-Kpanda, Groguida and Likpillassié located on Grand Lahou coast in South-West of Côte D'Ivoire. Place and...

Despite ongoing research into technologies for the removal of antibiotics from contaminated water, there is a necessity to provide a cost-effective water treatment solution. In this study, the activation of sodium percarbonate (SPC) by pegmatite soils ultrasonicated (US) has been used to degrade fluoroquinolone antibiotics, such as levofloxacin (LV...

Chlorobenzene (CB) and Chloronaphthalene (CN) emissions from cement plant operations pose significant environmental risks. This study investigates the mass transfer effects of chlorinated aromatic Volatile Organic Compounds (VOCs), specifically CB and CN, in the gas phase of a continuous-tangential-flow annular photocatalytic reactor. The experimen...

Organic compounds such as humic substances in the natural environment, especially in aquatic environments, are source of environmental problems. The stability of humic compounds in the soil is due to their adsorption on colloid surfaces through reactions with cations to form organ- mineral complexes. Many parameters such as pH, ionic strength. can...

Cette étude s’est proposée de valoriser la pomme de cajou e combustible. Le matériel est constitué de pommes de cajou séchée non carbonisée (PCSNC), pommes de cajou fermentées séchées carbonisées (PCFSC),, pommes de cajou séchées et carbonisées (PCSC), briquettes comportant 100% de pommes carbonisées et 0% de sciure de bois carbonisée (BPC100), bri...

In Côte d'Ivoire, pineapple occupies a prominent place after the coffee and cocoa binomial in exports. The country has long been the leading producer of smooth Cayenne in the European market. However, this dynamism is hampered by the lack of good quality rejects. To overcome this constraint, various methods of in vitro regeneration of plantlets hav...

During this study, different varieties of cotton seeds from various cotton growing areas in Côte d'Ivoire were physically and biochemically characterised. These are the varieties W471B, W448C, X442B and R405-2000 (Korhogo, North), BDL and BULK-SR (Bongouanou, East), W471A and W448C (Katiola, Centre). Physically, these varieties were characterised t...

La présente étude a pour objectif général de démontrer les effets néfastes de l'extraction aurifère artisanale sur l'environnement de la zone phytogéographique de Kanoroba, plus spécifiquement, les effets néfastes de cette exploitation sur la richesse, la maturité et la diversité des ressources floristiques et les risques sur les activités des agen...

Laterite available in developing countries, have great potential for wastewater treatment. In this study, heat treated laterites from Ivory Coast (Africa) were used to remove phosphorus from water by adsorption. Microstructural properties were investigated by Scanning Electron Microscopy (SEM) and X-Ray powder Diffraction (XRD), whereas thermal pro...

This paper describes artisanal gold mining practices and environmental impacts around the Ity-Floleu gold mine, in western Côte d'Ivoire. Interviews and field observations as well as measurements of turbidity and water flow velocity in the section of the river (Cavally) watering the study area, made it possible to identify 13 artisanal mining sites...

Well water intended for human consumption in the Akouédo area (Ivory Coast) contained arsenic at a concentration average above 0.01 mg/L, WHO guideline value. The shale was used as an adsorbent for the removal of arsenic from these waters. This shale was collected in Lomo Nord in Ivory Coast, washed then dried at a temperature of 60°C and finally c...

Cette étude découle d’un vaste projet de production sur différents substrats (hors sol, plein champs) et de valorisation de la tomate, dans la région montagneuse de Man. Aussi, ces expériences, qui s’inscrivent dans le cadre de la valorisation par la transformation des fruits de la production, ont-elles été menées dans l’optique d’évaluer les carac...

Bacteria are frequently studied in constructed wetlands (CWs) due to their effective involvement in pollutants purification processes. In this study, aerobic, anaerobic and total bacteria densities and their vertical distribution profile within pilot-scale vertical flow CWs planted with different plant species were investigated. Five beds were plan...

The objective of this study was to assess the contribution of the spatial organization of cropping systems and the physicochemical properties of surface layers of the agricultural zones soils in tropical hydrosystems to the spatial availability of nitrogen and pesticides during the wet season, such as the Béré watershed (BW) in Côte d’Ivoire. For t...

The rapid growth in urbanization and population increasing the demand for manufactured wood products, thus putting pressure on the forest cover of the countries. Strategies adopted for the recomposition of the destroyed forest cover should take into account the activities of the timber industries, from the stage of tree felling to the management of...

The strategic role of groundwater in the socio-economic development of Abidjan leads us to study their vulnerability. Specifically, it was to assess the anthropogenic pressure linked to the supply of nitrogen from agricultural activities on the Songon Agricultural Watershed and to draw up the map of the specific vulnerability to pollution of ground...

Constructed Wetlands (CWs) are an adequate wastewater treatment system with possibility to generate income, in particular by the use of plants of economic interest. However, very few studies deal with the bacteriological quality of plants after wastewater treatment. Thermotolerant coliforms and Sulfite-reducing bacteria were investigated on the abo...

Greywater reuse for agricultural irrigation may contribute to reduced use of chemical fertilizers, and is helping to conserve scarce freshwater source. However, treatment methods that reduce the harmful effects of untreated greywater are essential for sustainable agriculture. This study aims to evaluate greywater treatment by geo-materials (shale a...

La maitrise des Systèmes de Management Environnemental, Santé et Sécurité au Travail (SMESS) en vue d’un développement durable est devenu aujourd’hui une préoccupation mondiale intégrée dans la stratégie du management des entreprises. Ainsi, dans le but d’une amélioration continue des performances des SMESS des établissements industriels, surtout d...

The pollution by heavy metal in the environment, particularly groundwater, constitutes an environmental problem and health in Côte d’Ivoire. Among methods used for removal heavy metals, adsorption by natural absorbent such as a laterite is effective and cheap when compared to other methods. So, this study evaluates the laterite reactor performance...

The contamination of vegetables grown on the Akouedo landfill was studied and the health risks associated with their consumption was assessed. The concentrations of Cu, Zn, Ni, Pb and Cd in soil and vegetables were determined on the Abandoned and Operating sites. The concentrations of the bioavailability heavy metals in the soils showed that Zn and...

Developing low cost and effective phosphate adsorbents is crucial to prevent eutrophication of natural waters. Here, phosphate removal by a natural and abundant shale from the Ivory Coast was investigated in both batch and column experiments with special attention devoted to understand the adsorption process. Batch experiments were carried out to a...

Aqueous phosphate removal by three geomaterials from Ivory Coast was evaluated to determine their potential application as low-cost phosphate adsorbents in wastewater treatment. Batch experiments showed that phosphate uptake strongly depended on pH. Laterite and sandstone dissolution was less pronounced compared to shale. A correlation between conc...

To improve the understanding of the impact of uncontrolled Akouédo landfill upon the ecosystem of the river downstream, quality of effluent from this landfill and the settlement of macro-invertebrates in the river were studied. The study consisted to characterize the effluent drained into the river and to analyze the composition, distribution and d...

Although several emerging contaminants (e.g. fluoro(quinolones) (FQs)) have been simultaneously detected in environmental systems, there is very limited information on their elimination from contaminated waters in multi-component systems. In this study, removal of three FQs including flumequine (FLU), ciprofloxacin (CIP) and norfloxacin (NOR) were...

Although there is a growing interest in Fenton oxidation processes based on natural catalysts, the use of laterite soil to promote sequential adsorption/oxidation treatments of fluoroquinolone antibiotics has been scarcely investigated. In this work, the ability of an african laterite containing goethite and hematite to remove flumequine (FLU), use...

Waste management of the artisanal mining areas at Hiré and Angovia (localities in west of Côte d’Ivoire) and associated environmental and health impacts were studied. The survey and the field observation carried out in these both localities revealed that artisanal mining generates waste of various kinds, namely liquid waste, solid waste and air emi...

Greywater is a valuable additional water source for agriculture in arid and semi-arid countries subject to water scarcity. However, the impacts of applying greywater to agricultural land in the Sudano-Sahelian regions are not adequately understood. This study evaluates the impacts of using greywater, treated by the High Rate Algal Ponds system (HRA...

Sanitation and health of populations regarding malaria and diarrhea syndromes were studied in precarious neighborhoods of Abobo (Abidjan, Côte d’Ivoire). Globally, 587 concessions were sampled with 14 232 people. Human excreta are essentially disposed in autonomous sanitation systems (8-88%). The grouping of neighborhoods according to their sanitat...

The textile industry generates a large amount of wastewater containing various pollutants (dyes, heavy metals, salts, etc.), which cause severe problems to the environment. The treatment of these effluents by classical methods (activated sludge and physico-chemical) is very expensive for developing countries. In this context, alternative low-cost t...

Environmental pollution by phosphate in developing countries is growing with extensive and diffuse pollution. Solving these problem with intensive technologies is very expensive. Using natural sorbent such as laterite and sandstone could be a solution. The main objective of the study is to evaluate the P-removal efficiency of these materials under...

L'objectif de cette étude était d'évaluer la performance des filtres à sable à alimentation intermittente, garnis de schistes, de cuirasse et de granite concassés, pour l'enlèvement des orthophosphates provenant des eaux usées domestiques. Ces matériaux ont été sélectionnés sur la base de leurs propriétés physico-chimiques et de leur potentiel pour...

Data analysis from the National observation Network (RNO) of the water quality into the Ivorian Anti-Pollution Center (CIAPOL) bearing about the indicator bacteria of faecal pollution of lagoon bays in Côte d'Ivoire helped to understand the pollution Degree of Banco, M'Badon and Cocody bays. These bays were highly polluted by faecal coliforms (FC.)...

The selection of adequate plant species is a prerequisite for cleaning-up trace metal elements contaminated-soils by phytoextraction which is a cost-effective and environmentally-friendly technology. The potential of Amaranthus spinosus, Amaranthus viridis and Alternanthera sessilis to remove metal trace elements from the soil of the Akouédo landfi...

Households Surveys in Akouédo and M’Badon villages have identified household methods of waste management by the people. It appears that in both villages there is no adequate method for managing household waste. Garbage is thrown into the wild uncontrolled dumps. In Akouédo, 93% of respondents and in M’Badon, 98% of respondents are provided with mod...

Four biosand filters were used for treatment of Banco river source water to investigate the effects of sand depth (30, 50, 70 and 90 cm) on the removal of suspended solids, nitrogen and oxidized forms of the chemical demand oxygen and their effect on the pH. The results showed that the filter of 90 cm of sand was the most efficient. However, the pu...

The sanitary products (i.e toilet compost, urine, and greywater) from resource oriented sanitation are a low-cost alternative to chemical fertilizers and irrigation water for poor communities in dry areas. However, if these products are not managed carefully, increased soil salinity and sodium accumulation could occur. The aim of this study was to...

A series of sand filters was carried out for domestic wastewater treatment. This filter system was made of polyvinyl chloride pipe (PVC) and contained three compartments. Each compartment was in the shape of a “U” so that the compartment contained two columns, a filter column and a settling one. Each filter column was filled with granite, with the...

Urban runoff is one of the leading sources of water quality and human life deterioration. The urbanization of Abidjan and the densification of its population, each year, contribute to the flooding of some parts of this megalopolis in rainy seasons. To understand this situation, the working state of twenty stormwater open channels (SWOCs) was assess...

The characterization of shale powder fraction from Lomo Nord (Ivory Coast) was performed in order to find potential applications for this material as phosphate low-cost adsorbents. The crushed shale (ø ˂ 80µm) consisted of quartz, albite, microcline, chlorite, dolomite and kaolinite as associated minerals. The net effective charge of shale particle...

Abstract Toilet compost and human urine are among natural fertilizers, which raise interest due to their double advantages to combine sanitation and nutrient recovery. However, combination of urine and toilet compost is not so spread probably because the best ratio (urine/toilet compost) is still an issue and urine effect on soil chemical propertie...

Les nombreux évènements environnementaux mondiaux trouvent essentiellement leurs origines dans la gestion de l’environnement global. Les pays en développement dont les budgets consacrent peu de financement à ce secteur, sont d’avantage fragilisés avec une situation sanitaire qui enregistre des maladies émergentes. La Côte d’Ivoire ne fait pas l’exc...

The demographic growth and changes in the lifestyle of population are creating high demand for water resources all over the world. In Côte d'Ivoire, especially in the Northern part, conflicts related to access to water appear between farmers and ranchers. These conflicts are becoming more frequent due to the decrease of the availability of water. T...

La potentialité en biogaz des excréments humains et des résidus agropastoraux du bassin versant du fleuve Sassandra (BVS) a été évaluée à partir des statistiques agricoles et de la population, ainsi que des indices de productivité de biogaz. Egalement, la mise en œuvre des technologies de production de biogaz dans ledit bassin a été analysée. Le BV...

A concrete biosand filter (BSF) was designed, and its performance was evaluated on three different water used in the rural communities. The field study was conducted by using tap, well and pump waters, and a questionnaire was administered to apprehend the community’s attitudes in the BSF utilisation. BSF performance was characterised by analysing t...

Human dejections and agro-pastoral residues biogas potentials of the Comoé river catchment (CRC) were evaluated using agricultural and population statistics, and the indices of residues biogas productivity. The CRC contains an annual biogas volume of 318x106 m3. This energy resource is by far higher than the energy needs of rural population in Côte...

Water resources pollution by pesticides is a world concern problem. The transport of these chemicals in international basins is a subject of major interest in the management committee of the aforementioned basins. The mass of active molecules of the pesticides applied in the Comoé basin (BVC) was evaluated using the agricultural statistics and pest...

Environmental pollution by pesticides is a major problem which is neglected in developing countries. The statistics of pesticides application were obtained from actors implied in agriculture in Marahoué watershed (MWS). The Kohonen self-organizing map (KSOM) technique was used to classify the pesticides applied in the MWS according to their physico...

Plant density may have an impact on macrofauna structure in constructed wetlands (CW). In this study, Panicum maximum density effect on macrofauna structure in pilot-scale vertical flow CW treating domestic wastewater was estimated. Two beds were planted with P. maximum at 10 roots/m2 (low density) and two others at 20 roots/m2 (high density). Two...

Environmental pollution by pesticides is a major problem which is neglected in developing countries. The statistics of pesticides application were obtained from actors implied in agriculture in Marahoué watershed (MWS). The Kohonen self-organizing map (KSOM) technique was used to classify the pesticides applied in the MWS according to their physico...

Water of the Banco river contaminated by domestic wastewater was treated in a biosand filter (BSF). The reactor system was filled from the bottom to the top with 10 cm of gravel and 90 cm of white sand from lagoon. Supernatant water depths were used (10, 20, 30 and 40 cm). The concentration of NH 4+ of the effluents is always lower than of raw wate...

To improve our understanding of the ecological functioning of constructed wetlands, the macrofauna structure in the sediments of a constructed wetland planted with Panicum maximum treating domestic wastewater was studied. Two beds were planted with young P. maximum and two unplanted beds were used as controls. After 150 days of wastewater treatment...

The contribution of two anthropized stormwater channels by industrial (Uniwax) and domestic (Attécoubé) effluents to the Ebrié lagoon pollution was studied. Dynamics of nutrients (P, N) and solids conveyed in dry and wet weather by the stormwaters flowing into the channel were evaluated. Nutrients and solids masses drained by Uniwax stormwater decr...

This study consists of testing the efficiency of a vertical-flow constructed wetland planted with Panicum maximum to purify urban effluents in topical climate. The experiment is conducted under pilot-scale composed of beds constructed with bricks. Fourth beds of 600 l capacity are filled with gravel and sand. Two beds are planted with young roots o...

A pilot scale constructed wetland planted with Amaranthus hybridus was developed for domestic wastewater treatment. The reactor system was composed of rectangular beds realized in cement. Each bed was filled from the bottom to the top with 0.1 m of gravel (15/25 mm) and 0.30 m of a white sand originating from the Ebrié lagoon. Two beds planted with...

Résumé Les eaux résiduaires d’une usine agroalimentaire située à Abidjan, traitées par boues activées, ont été caractérisées en vue d’une réutilisation pour l’arrosage des espaces verts. L’effluent à la sortie de la STEP présente un taux d’abattement d’environ 96 % pour la DCO et la DBO 5 . Le pH varie entre 6,5 et 8,5. Quant aux parasites (ankylos...

This paper discusses the effects of three Aspergillus niger inoculum concentrations (0.12, 2.3 and 3.6 g/l) upon the kinetics of starch pretreatment under aerobic and transitory conditions using a tanks-in-series reactor. A synthetic wastewater containing starch as model polysaccharide was fed into the reactor system to study this polymer transform...

The wastewater from an agro-food industrial factory, treated by an activated sludge process, was characterized for re-use in the watering of parklands. The factory was located in Abidjan, Ivory Coast. The effluent from the sewage treatment plant showed a reduction of the Chemical Oxygen Demand (COD) and five-day Biological Oxygen Demand (BOD 5 of a...

The effect of Aspergillus niger bioaugmentation on COD and protein removal in domestic wastewater under sewage conditions was assessed. The sewer simulating bioreactor was running at a hydraulic retention time of 17 h, 20°C and pH 7.8 under aerobic condition. When A. niger was bioaugmented, 45 % to 72 % of COD was removed compared to 28 % to 48 % r...

Le choix d\'un microorganisme pour epurer les eaux usees est difficile, car celui-ci doit conserver ses activites metaboliques en situation de stress. La discrimination entre Aspergillus niger et A. oryzae, a ete effectuee en utilisant le test de respirometrie et le phenol comme inhibiteur modele. Ensuite, la degradation du phenol seul et en presen...

In an effort to evaluate the technical feasibity of a fungal pre-treatment of domestic wastewater, the effects of Aspergillus niger inoculum size upon macromolecule degradation in a model wastewater under transient conditions were studied. The model wastewater consisted in an aqueous solution of Bovine Serum Albumin (BSA) and mineral salts and the...

The sanitation, water sources and utilizations, and the health status of the population about malaria (SPP) and diarrhea (SD) have been evaluated in 6 precarious area (Abattoir, Adjouffou, Derrière wharf, Tofiato, Vridi canal et Zimbabwe) at Port-Bouet in Côte d’Ivoire. An overall of 567 concessions were checked and the population were about 9 741....

Fungal biomasses are capable of treating metal-contaminated effluents with efficiencies several orders of magnitude superior to activated carbon (F-400) or the industrial resin Dowex-50. Additionally, fungal biomasses are susceptible to engineering improvements and regeneration of their capabilities. With regard to organic pollutants, excessive nut...

A mixture of polymeric substrates (simulating a complex wastewater) was transformed under sewer conditions and aerobiosis by Aspergillus niger in a tanks-in-series reactor at a hydraulic retention time of 14 h. Starch was totally removed after 7 h of incubation. Removal of the protein portion with a molecular weight larger than 2 kDa followed the s...

Sewers are typically a means of transporting wastewater to a treatment facility, with little biotransformation of the soluble polymeric organic matter by suspended biomass. In the interest of providing an effective pretreatment of wastewater in a sewer network, it is necessary to design an accurate tool simulating sewer conditions and introduce an...