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Journal of Water Resource and Protection 2024年第8期16卷 559-568页

作者： mamadou Lamarana Souare mamadou madaniou sow Saran Camara Adama Moussa Sakho Technical Department of Laboratory Superior Institute of Technology Mamou Republic of Guinea Study and Research Center in the Environment (CERE) Gamal Abdel Nasser University of Conakry Republic of Guinea

Water is essential to life and to the sustainable socio-economic development of a nation, It is therefore interesting to have a better knowledge of the quality of this water. The aim was to determine the degree of microbiological and physico-chemical pollution of the water of the “Mamouwol” river in the town of Mamou. To do this, we chose four (4) sampling sites spread throughout the town of Mamou. During the month of March (2024), 4 water samples were analyzed to monitor the water quality of this river. The average values of the flora analyzed show that these water are heavily contaminated with bacteria indicative of fecal and metal pollution. This study showed that sites: Mam4;Mam2 and Mam1 contain the highest loads, with Total Coliform counts ranging from 1534 CFU/100 ml to 2100 CFU/100 ml, the number of faecal coliforms varies between 526 and 1240 CFU/100 ml, and that of faecal streptococci between 526 and 841 CFU/100 ml. Metal content, BOD5 and COD all comply with the laboratory’s analysis criteria, although they vary from point to point.

关键词： Pollution Water Watercourses Waterborne Diseases Microbiological Analysis

Investigation of Anthropogenic Activities along the Mamouwol River in the Urban Commune of Mamou (Republic of Guinea)

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Journal of Environmental Science and Engineering(A) 2024年第1期13卷 15-22页

作者： mamadou Lamarana Souaré Saran Camara Adama Moussa Sakho mamadou madaniou sow Laboratory Technique Higher Institute of Technology of MamouMamou 063Republic of Guinea IRLA-Guinea Laboratory Institute for Applied Language Research(IRLA)Conakry 2201Republic of Guinea

The monitoring of our watercourses for their preservation must be an imperative concern of the whole *** aim of this study is to describe the main causes of degradation and destruction of the natural resources of the Mamouwol River in the Mamou *** were collected using a survey method(questionnaire,interviews and observations).The study revealed that extensive agro-pastoral activities are the main socio-economic activity of the population,accounting for 78.5%-90%and 20.30%*** follows(1.2%).Related activities include handicrafts and petty trade;Other human activities:hunting(11%),charcoal burning(58%),brick making and firing(45.6%).Riverbanks and water resources in the vicinity of dwellings are damaged and polluted by socio-economic activities and the use of agricultural *** absence of industrial units on the path for the data collection.

关键词： Natural resources human activity degradation Mamouwol River Mamou.

Removal of Nitrate and Phosphate Ions from the Bafing River by an Adsorbent Obtained from the Shells of Mango Cores

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Journal of Geoscience and Environment Protection 2023年第1期11卷 67-78页

作者： mamadou madaniou sow Aicha Cisse Adama Moussa Sakho Cellou Kante Department of Laboratory Techniques Institut Supérieur de Technologie Mamou Republic of Guinea Laboratory of Analytical Chemistry Faculty of Sciences Gamal Abdel Nasser University of Conakry Conakry Republic of Guinea Laboratory of the Office National de Contrô le de Qualité de Matoto Conakry Republic of Guinea

The valorization of agricultural waste in the treatment of our rivers can be an alternative to waste management. This study deals with the use of mango kernel shells in the depollution of the Bafing River (rural commune of Tolo, Mamou prefecture) in the Republic of Guinea. Thus, the different concentrations of ions found in April (low water period) were determined and which are: a reduction of 35.64 mg/l (79.69%);a reduction of 41.53 mg/l (81.24%);and 47.53 mg/l (82.10%) and 3.83 mg/l (75.24%);8.45 mg/l (81.72%);11.67 mg/l (87.94%) at the sampling points P1, P2, and P3 respectively. In October (flood period), the concentrations found are 24.98 mg/l reductions (79.88%);29.83 mg/l reduction (81.41%) and 35.15 mg/l (85.50%) at the same sampling points P1, P2 and P3, respectively. This study can be considered as a water treatment alternative for the village community of the Tolo sub-prefecture (Mamou prefecture).

关键词： Adsorbent Water Removal Nitrate and Phosphate

Production of New Adsorbent from Mango residues Collected in the Urban Community of Mamou

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Journal of Agricultural Chemistry and Environment 2022年第4期11卷 296-306页

作者： mamadou madaniou sow Adama Moussa Sakho Aboubacar Diallo Cellou Kante Department of Laboratory Technology Mamou Superior Institute of Technology Mamou Republic of Guinea Department of Chemistry Gamal Analytical CheAbdel Nasser University Conakry Republic of Guinea Laboratory of the National Office Quality Control of Matoto Conakry Republic of Guinea

Activated coal obtained from mango residues is an alternative for the valorisation of these wastes for applications. This work focuses on the production of a new adsorbent from mango residues collected in the urban common of Mamou (Republic of Guinea) by chemical activation with potassium hydroxide. To do this, the different rates: humidity, cinders, volatile matter, fixed carbon et iodine indices before activation and after activation at 400°C and 700°C were determined which are: (6.28%;0.97%;73.80%;25.23%) respectively. The best indices were found in powdered activated coal compared to grain activated coal for the concentrations used. This study can be an alternative bio-adsorbent for the urban community of Mamou in water treatment.

关键词： Mango residues Adsorbent “Iodine Index” and “Urban Common of Mamou”

Determination of the Physico-Chemical Quality of the Waters of the Mamouwol River in the Urban Commune of Mamou, Republic of Guinea

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Journal of Environmental Science and Engineering(A) 2024年第4期13卷 111-121页

作者： mamadou madaniou sow mamadou Lamarana Souare Adama Moussa Sakho Alhassane Diami Diallo Laboratory Techniques Department Mamou Higher Institute of TechnologyMamou 063Republic of Guinea Chemistry Department Gamal Abdel Nasser UniversityConakryConakry 1147Republic of Guinea Guinea Waters Company Laboratory Almamya QuarterConakry BP:150Republic of Guinea

Water is one of the most important elements on which our daily lives depend,because of its many uses in various *** ensure that people have the right of access to water,the authorities must provide them with treated water that complies with the regulations and standards in force,particularly from a physico-chemical point of view,for all possible uses to avoid any health problems for *** aim of this research is to study the water in the Mamouwol River by measuring physico-chemical parameters:(1)pH,it varies from 5.2“Mam3”to 7.8“Mam4”in August 2021 then from 5.5“Mam3”to 7.7“Mam4”in March 2022,*** average of 6.9 for all sampling points;(2)Turbidity varies from 0.3 NTU“Mam1”to 26.3 NTU“Mam4”in August 2021,then from 0.3 NTU“Mam1”to 30.6 NTU“Mam4”in March 2022,*** average of 9.0 NTU for all sampling points;(3)Suspended matter,varying from 0.6 mg/L“Mam1”to 17.6 mg/L“Mam4”in August 2021,then from 0.6 mg/L“Mam1”to 30.0 mg/L“Mam4”in March 2022,*** average of 8.8 mg/L for all the sampling points“Mam1”,“Mam2”,“Mam3”and“Mam4”;(4)Dissolved oxygen,varying from 2.07 mg/L“Mam3”to 6.12 mg/L“Mam1”in August 2021,then from 1.05 mg/L“Mam3”to 5.05 mg/L“Mam1”in March 2022,*** average of 2.77 mg/L for all sampling points;(5)Nitrates vary from 1.32 mg/L“Mam1”to 3.96 mg/L“Mam4”in August 2021,then from 1.49 mg/L“Mam1”to 5.27 mg/L“Mam3”in March 2022,*** average of 5.53 mg/L for all sampling points;(6)Nitrites,varying from 0 mg/L“Mam1”and“Mam2”to 0.06 mg/L“Mam3”in August 2021,then from 0 mg/L“Mam1”and“Mam2”to 0.13 mg/L“Mam3”in March 2022,*** average of 0.03 mg/L for all sampling *** results show the presence of organic pollution.

关键词： River water Mamouwol physico-chemistry pollution

Study and Formulation of Composite Flours Based on Gluten Flour and Local Cereal Flours: Fonio, Millet and Sorghum

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Journal of Agricultural Chemistry and Environment 2024年第1期13卷 169-181页

作者： Laouratou Bah Kéloua Kourouma Adama Moussa Sakho Aboubacar Diallo mamadou madaniou sow Laboratory of Food and Nutritional Sciences of the Higher School of Tourism and Hospitality Conakry Republic of Guinea Department of Laboratory Technology Higher Institute of Technology of Mamou Mamou Republic of Guinea Higher Institute of Architecture and Town Planning Conakry Republic of Guinea Department of Chemistry Gamal Abdel Nasser University of Conakry Conakry Republic of Guinea

This study makes it possible to establish baking flours of nutritional quality and technologically acceptable following the increase in their rheological parameters due to the insertion of gluten flour. The composite flours were obtained using the Philips mixer type (model HR2811). The nutritional qualities of the formulated flours were determined by the Kjeldahl, AOAC 985-29, UV-VIS spectrophotometry (DR 5000;HACH and LANGE, France) and Soxhlet gravimetric methods. The compounds obtained are respectively: Protein, carbohydrate, lipid, micronutrient and vitamin contents. Monitoring the analysis of functional properties (water and oil absorption capacity) as well as baking value.

关键词： Cereal Flour Gluten Flour Bread Making Biochemical and Rheological Properties

Physico-Chemical Studies of the Bricks in Mud Raw Used in the Construction of Century-Old Huts(Straw Huts):Case of the Urban Commune of Kouroussa

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Journal of Environmental Science and Engineering(A) 2023年第6期12卷 201-213页

作者： Mamady Kourouma Adama Moussa Sakho Aboubacar Diallo mamadou madaniou sow Abdoulaye Ibrahim Camara Mamoudou Conté Department of Chemistry Gamal Abdel Nasser University of ConakryConakry 1147Republic of Guinea Department of Laboratory Techniques Higher Institute of Technology of MamouMamou 063 MamouRepublic of Guinea Higher Institute of Architecture and Town Planning Conakry 324Republic of Guinea of Guinea Department of Building Materials Scientific research center of Conakry-Rogbane 1615 Republic of Guinea of Guinea

Building construction using cement bricks on the one hand,and mud bricks on the other hand,presents problems of resistance and durability in the face of natural weathering in our country(Republic of Guinea).These difficulties could be linked to non-compliance with standards and the failure to master certain physico-chemical,mechanical and technical parameters when constructing a *** order to remedy this problem,a series of studies were carried out on samples of mud bricks used in the construction of century-old straw hut buildings in the urban commune of Kouroussa(Republic of Guinea).To this end,the compressive strength of the brick samples was assessed either:0.10 MPa,and sensory techniques of certain characteristics were carried out to evaluate the cohesion of the elements in the brick samples,such as:coward boule technique,hand washing test,withdrawal of a soil(pellet or ring test)and of the jar *** physico-chemical analyses methods were carried out using XRF(X-Ray Fluorescence Spectrometry),granulometry and Atterberg limits in accordance with NF P *** results showed a high insoluble residue content(49.9%)and the sample had a clay-like appearance with a low PI(Plasticity Index)=8%.This study could be an alternative guide for the authorities in charge of housing and construction in the Kouroussa prefecture(Republic of Guinea).because,the majority of houses in Upper Guinea are built with mud raw bricks or fired bricks.

关键词： Century-old in straw hut building raw earth brick resistance durability

Physico-Chemical and Microbiological Study of Fresh Pineapple(Baronne de Guinée)Grown in the Sub-prefectures of:Maferinyah and Friguiagbé(Forécariah and Kindia Prefectures),Republic of Guinea

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Journal of Environmental Science and Engineering(A) 2024年第6期13卷 211-217页

作者： Sâa Gérard Tolno Haicha Cissé Amadou Sylla mamadou madaniou sow Adama Moussa Sakho Lounceny Traore Department of Laboratory Techniques Higher Institute of Technology of MamouMamou 063Republic of Guinea Department of Chemistry Gamal Abdel Nasser University of ConakryConakry 1147Republic of Guinea Department of Chemical Engineering Gamal Abdel Nasser University of ConakryConakry 1147Republic of Guinea

Pineapple fruit in the Republic of Guinea is currently less competitive in the West African sub-region due to the nutritional quality of the ***,it is normal to review certain parameters such as:sensory,physico-chemical in order to improve this *** do this,instead of buying samples on the market,the aim is to analyze fresh samples harvested in the production fields and send them to the laboratory for analysis of certain physico-chemical and microbiological *** results showed that the Brix content in fields I and II at Maferinyah(Forécariah)was higher(14.35 and 16.5)than that found in fields I and II at Friguiagbé(Kindia)(14.2 and 12.4),The pH of fruit from both localities varies between 3.48 and 3.56,with the highest acidity value found in Field I at Friguiagbé(Kindia)2.16 and the lowest value in Field II at Maferinyah(Forécariah)*** contents for both localities ranged from 82.56 to 89.5,with the highest value found at Field I in Maferinyah(Forécariah)*** extract and ash in both localities would be in the range 10.54 to 17.45;0.33 to 1.43 *** highest values for dry extract and ash were found in Fields I and II Friguiagbé(Kindia)17.45 and *** samples analyzed contained certain trace elements such as magnesium,sodium,iron and *** analyses showed the presence of Escherichia coli(***),yeast-molds,Staphylococcus aureus and the absence of salmonella.

关键词： Fresh pineapple cultivated physicochemical study microbiology

Study of the Characteristics of Large-Diameter Iron Bars Obtained by Rolling at the ODHAV Foundry in the Republic of Guinea

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Journal of Materials Science and Chemical Engineering 2024年第6期12卷 43-54页

作者： Alpha Issa Diallo Jean Ahmadou Kourouma Adama Moussa Sakho Younoussa Moussa Baldé mamadou madaniou sow Alexandre Lucien Richard Mechanical Laboratory Higher Institut of Technology of Mamou Mamou Republic of Guinea Materials Laboratory of the Gamal Abdel Nasser University of Conakry Conakry Republic of Guinea Dpartment of Laboratory Technology Higher Institut of Technology of Mamou Mamou Republic of Guinea Department of Energy Science Higher Institut of Technology of Mamoun Mamou Republic of Guinea

This work consists of evaluating the quality of the mechanical parameters of large-diameter steels, i.e. 20, 25, 28 and 32, through a process of recycling scrap metal that fills garages, rubbish dumps, gutters and other abandoned sites, as well as imported concrete reinforcing steel sold in the Republic of Guinea. To carry out this important work, a number of mechanical tensile and bending tests and a microscopic analysis combining two devices, an electron microscope and a photographic camera, were carried out. The samples were taken from sampling areas in the major communes of Conakry, namely: Casse Sonfonia, Matoto and Kagbélen. The tensile strength values of the large dimensions 20, 25, 28 and 32 are given in the tables.

关键词： Recycled Scrap Large Diameter Rolling Tensile Testing Bending