Asian Journal of Physical and Chemical Sciences最新文献

{"title":"Resizing of Irrigation Pumps Used for Heap Leaching in a Mine: Case of SOMAÏR","authors":"Ousman Mahamadou, S. Harouna, A. M. Hassan, Boureima Seibou, Illou Issoufa Souleymane, Mamadou Kanta Elh Kassoum","doi":"10.9734/ajopacs/2024/v12i1216","DOIUrl":"https://doi.org/10.9734/ajopacs/2024/v12i1216","url":null,"abstract":"The aim of this study is the analysis and resizing of irrigation pumps used in heap leaching at the Mines de l'Aır company. This company is located in the Arlit department in the Agadez region of Niger. This work essentially consisted of checking the current pumps, integrating the new parameters and choosing the right pumps, either by respecting the current standard or by proposing other types of more efficient pumps. The study revealed that for the 3rd stage pumping circuit, the Total Head (HMT) value of 33.58 m is lower than that of the pumps, which is 34.03 m. This pump sends the fluid to the desired heap height with a pressure of 0.5 bar, whereas the desired pressure for watering is around 2 bar. The result: a drop in uranium juice production. The pump does not exhibit cavitation, as the Net Positive Suction Head (NPSHD) is equal to 4.71 m, a value that far exceeds the NPSHr , which is equal to 1.44 m. Given that at 1485 rpm the pump is unable to deliver a pressure of 6 bar with the valve closed, we can say that the pump has lost its performance. By the 3rd stage, the HMT of the circuit is equal to that of the pump, so the pump will still be able to deliver the fluid to the piles, but at a very low pressure, and even if both pumps are switched on simultaneously, the flow rate will not exceed 150 m3 /h. This means that irrigation will be very poor, resulting in mediocre uranium juice production. With a pump efficiency of 61.98%, we can say that the pump is operating under optimum conditions and does not suffer from cavitation, as the NPSHD is well above the NPSHr . For the 4th stage circuit, the CPKN 100-404 pump driven at 1650 rpm gives a flow rate of 175 m3 /h and a head of 57.91 M.C.E. The MegaCPK 125-80-380 pump driven at 1750 rpm gives a flow rate of 190 m3 /h and a head of 60.28 M.C.E. The CPKN 150-440 pump, driven at 1450 rpm, operates at 230 m3 /h and 67.55 M.C.E. The MegaCPK 150-125-380 pump, driven at 1750 rpm, delivers 250 m3 /h and a head of 71.71 M.C.E.","PeriodicalId":8541,"journal":{"name":"Asian Journal of Physical and Chemical Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140436411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of the Degree of Pollution in Trace Metal Elements (TME) of the Dam in the Rural Commune of Korsimoro, Burkina Faso","authors":"Moumouni Derra, L. Bambara, Kiswendsida Alain Tougma, Karim Kaboré, Yalgado Zakaria Sawadogo, O. Cisse, François Zougmoré","doi":"10.9734/ajopacs/2024/v12i1215","DOIUrl":"https://doi.org/10.9734/ajopacs/2024/v12i1215","url":null,"abstract":"The objective of this study was to evaluate the level of pollution in trace metal elements from the dam in the rural commune of Korsimoro. Thus, nine (9) water samples were taken at different points of the dam and analyzed at the laboratory of the Bureau of Mines and Geology of Burkina (BU.MI.GE.B). A total of eight (8) metallic trace elements including As, Cr, Mo, Mn, Hg, Pb, Se and Ni were characterized and quantified using inductively coupled plasma optical emission spectroscopy (ICP/OES). The results reveal that if the contents of certain elements are low in certain samples, others on the other hand have sometimes very high contents of Hg and Se. For Hg, concentrations range from an average of 25.74 µg/kg to a maximum of 148.91 µg/kg against a threshold of 1 µg/kg recommended for water intended for irrigation. As for Se, its concentration ranges from an average of 14.67 µg/kg to a maximum of 37.01 µg/kg against a standard of 20 µg/kg for irrigation. Thus, the high concentrations of Hg and Se in the waters of the Korsimoro dam constitute a public health problem since they strongly contribute to the contamination of market garden products via the soil. Also, the animals which drink there as well as the resources fish (fish, shellfish, etc.) could be contaminated. And, by bioaccumulation and/or by biomagnification, humans at the end of the food chain can in turn be severely contaminated. Thus, it is imperative to find a solution, especially on the Hg pollution of the dam when we know that it constitutes a real public health problem with its excessively high content.","PeriodicalId":8541,"journal":{"name":"Asian Journal of Physical and Chemical Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139533998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of the Impact of the Magnetic Field on the Electrical Parameters of the Radial Junction Photovoltaic Cell under Monochromatic Illumination","authors":"Cyrile Constant Moyenga, B. Zouma, Ramatou Konaté, Aboubacar Savadogo, B. Korgo, Si´e Kam","doi":"10.9734/ajopacs/2023/v11i4214","DOIUrl":"https://doi.org/10.9734/ajopacs/2023/v11i4214","url":null,"abstract":"The present work is a theoretical study of the radial junction photovoltaic cell subjected to a magnetic field under monochromatic illumination. From a three-dimensional description, new analytical expressions of photocurrent density, photovoltage and electric power as a function of the magnetic field are established and by simulation on the Mathcad 15 software, we extracted the different curves. These representations allowed a thorough investigation of the operation of this model of a photovoltaic cell. It appears from this study that the amplitudes of parameters such as photocurrent density, photovoltage and electrical power are strongly attenuated when the photovoltaic cell is in the presence of a magnetic field assumed to be uniform over the entire region. For a magnetic field of 0.35 mT and a diffusion length, the short-circuit current decreased by 59.75% and the opencircuit photovoltage by 9.32%.","PeriodicalId":8541,"journal":{"name":"Asian Journal of Physical and Chemical Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138979984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modeling Total Electron Content and Critical Frequency at F1 and E Layer Boundary","authors":"Kadidia Nonlo Drabo, Moustapha Konaté, Roger Nakolemda, Gedeon Sawadogo, Emmanuel Nanéma, Frederic Ouattara","doi":"10.9734/ajopacs/2023/v11i4213","DOIUrl":"https://doi.org/10.9734/ajopacs/2023/v11i4213","url":null,"abstract":"This work investigates the variation of the total electron content TEC and the critical frequency fo in the boundary zone of the F1 and E layers at the low-latitude in the ionosphere. This study takes place at the Ouagadougou station (12.4°N and 358.5°E), in West Africa during the quiet geomagnetic activity of solar cycle 23. Ionosphere is the upper layer of the Earth's atmosphere ionized mainly by solar X- and UV-rays, extending from around 80km altitude up to 1000km [1] [2]. Ultraviolet light from the sun ionizes the atoms and molecules in the Earth's upper atmosphere [3]. For this study we use the 2016 version of International Reference Ionosphere (IRI) model. The quiet periods of maximum and minimum phase of solar cycle 23 are considered [4] [5]. From this study, it emerges that at the E and F1 layer boundary zone, TEC and fo increase during the day as solar irradiance increases and decrease as solar irradiance decreases.","PeriodicalId":8541,"journal":{"name":"Asian Journal of Physical and Chemical Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138598298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Processing and Characterization of PbS Nanoparticles by Ball Milling Technique and Their Applications","authors":"Simon K. Ologundudu, Azubuike J. Ekpunobi","doi":"10.9734/ajopacs/2023/v11i4212","DOIUrl":"https://doi.org/10.9734/ajopacs/2023/v11i4212","url":null,"abstract":"Lead Sulphide (PbS) nanoparticles were processed using ball milling techniques. The processed PbS nanoparticles were characterized using atomic absorption spectroscopy (AAS), X-ray diffraction (XRD), scanning electron microscopy (SEM),, energy dispersive analysis (EDAX), and electrical investigation using four-point probe. The XRD results of the PbS nanoparticles show peaks at the crystal plane (111), (200), (210), (211) and (320). The average size of PbS nanoparticles crystallite is found to be 51.05 nm. The optical energy band gap of PbS nanoparticles dispersed in ethanol was observed to be 3.98ev and 4.06eV for PbS nanoparticles dispersed in distilled water. The absorbance of PbS nanoparticles shows that the absorbance values were moderate in the UV region but dramatically decreased as they moved towards the visible and near-infrared regions. The EDX analysis shows that PbS nanoparticles is composed of 54.36% Pb, 36.47% C and 9.16% S. The sheet resistance, resistivity, and conductivity were measured and found to be 1.51 × 107 Ω/Sq., 3.61 Ω.cm and 2.77 × 10-1 (Ω.cm)-1 for PbS nanoparticles. PbS nanoparticles are classified as promising materials for various electronics and optoelectronic devices based on the determined properties.","PeriodicalId":8541,"journal":{"name":"Asian Journal of Physical and Chemical Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134957301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Collision of Incident Electrons with Liquid Water Molecules: Study of Linear Energy Transfer (LET)","authors":"Kane Issa, Aboubacar Almoustapha, Ousmane Manga Adamou","doi":"10.9734/ajopacs/2023/v11i4211","DOIUrl":"https://doi.org/10.9734/ajopacs/2023/v11i4211","url":null,"abstract":"We used GAMOS software to simulate the interaction of electrons in liquid water. In our work, the chosen parameter, the Linear Energy Transfer (LET), is studied in an energy range from 2.5 eV to 100 MeV. The results obtained were analyzed and compared with experimental data and literature. A very good agreement emerged.
 Also the analysis of the LET curve of the medium crossed presents a maximum of 37.0626 MeV/mm corresponding to an electron energy of 102.447 eV. For energies below this value, the energy loss is greater. On the other hand, for energies higher than this value, there is less energy loss.","PeriodicalId":8541,"journal":{"name":"Asian Journal of Physical and Chemical Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134902815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Age-dependent Radiological Risk Assessment of Radon (222Rn) in Samples of Commercial Bottled Water from Benin City, Nigeria","authors":"Felix A. Popoola, Osahon O. David, Sheu I. Owoyemi, Modupe E. Sanyaolu, Isaac O. Elijah, Iko A. Simon","doi":"10.9734/ajopacs/2023/v11i4210","DOIUrl":"https://doi.org/10.9734/ajopacs/2023/v11i4210","url":null,"abstract":"Radon inhalation as well as ingestion through the use of water has a high potential of causing serious harm to sensitive cells and organs of the body when absorbed into the bloodstream. Therefore, this study aimed to assess the radiological health damage caused by radon in drinking bottled water available in Benin City, Edo State, Nigeria. Radon concentration was measured using a RAD7 electronic radon detector. The mean activity concentration radon is 137.18 ± 0.25 mBq/L. This mean value is slightly higher than 0.1 Bq/L recommended by the Standard Organisation of Nigeria but lower than the maximum contaminant level (MCL) of 11.1 Bq/L set by the United States Environmental Protection Agency and 100 Bq/L set by the World Health Organisation (WHO) for consumption of radon in drinking water. The mean total annual effective dose is 1.07±1.91 ((mu)Sv/y) for infants, 0.61±1.09 ((mu)Sv/y) for children, and 0.70±1.24 ((mu)Sv/y) for adults. The computed annual effective dose to the public by inhalation and ingestion radon through the use of bottled water in the study areas are lower than the 0.1 mSv/y limit recommended by WHO. The estimated average for the age group excess lifetime cancer risk are 3.21 ± 5.71, 1.836 ± 3.26, 2.086 ± 3.71 (x 10-6) for infants, children and adults respectively. These values are below the world average permissible levels. Hence, consumption of the water examined poses no serious health risk to consumers.","PeriodicalId":8541,"journal":{"name":"Asian Journal of Physical and Chemical Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135973547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Behavioral Pattern of Photovoltaics Enhanced with Automatic Cooling Mechanism","authors":"Armstrong O. Njok, Julie C. Ogbulezie, Effiong A. Archibong","doi":"10.9734/ajopacs/2023/v11i4209","DOIUrl":"https://doi.org/10.9734/ajopacs/2023/v11i4209","url":null,"abstract":"The increase in PV panel temperature with increasing level of solar power and solar flux is a major disadvantage when using Photovoltaics for electricity generation. Nigeria is a country that is blessed with enormous amount of sunlight throughout the year which should make it a good environment for the generation of electricity via photovoltaic technology. The daytime temperature of Nigeria is a major barrier towards the effective generation of electricity via photovoltaic technology. To remedy this issue of temperature, a cooling mechanism has to be considered in the process of any PV system design. An automatic cooling mechanism and an intelligent photovoltaic maximum power point tracker were deployed in the study. Experimental measurements were carried out in real outdoor conditions. The results of the study reveal an average increase of 6.42%, 7.77%, 18.34%, and 18.15% for voltage, current, power and efficiency respectively for the PV module under thermal regulation. This study demonstrates that cooling mechanism should be incorporated in the process of designing photovoltaic systems for optimum energy yield.","PeriodicalId":8541,"journal":{"name":"Asian Journal of Physical and Chemical Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135696361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Geo-Electric Survey of Potential Aquifer Inome Parts of Amaigbo, in Imo State, Using Vertical Electrical Sounding and Well Log Data","authors":"Deborah Chidimma Ndubueze, Jiriwari Amoneah, Opiriyabo Horsfal","doi":"10.9734/ajopacs/2023/v11i3208","DOIUrl":"https://doi.org/10.9734/ajopacs/2023/v11i3208","url":null,"abstract":"The method employed was an electrical resistivity survey which was carried out to study the subsurface layer with a view of determine the depth of potential aquifers, the thickness of an aquifer, and to determine the potential aquifer for groundwater exploration. Using the Schlumberger array technique, Vertical Electric Sounding (VES), along with Self Potential well logging was carried out at six (6) VES stations in Amaigbo using the ABEM SAS 1000 terrameter and ABEM SAS 1000 logger respectively. The field data obtained have been analysed using the computer software (IP2win) which automatically interprets the apparent resistivity. The VES result revealed the heterogeneous nature of the subsurface geological sequence. Result from the Geo-electric section showed that the aquifer resistivity of the study ranges from 352(Omega)(mathit{m}) to 7514(Omega)(mathit{m}) , with potential groundwater depths ranging from 45m to 119m which shows that the study area is perfect for groundwater development. The data from the SP well logs correspond to the VES data obtained.","PeriodicalId":8541,"journal":{"name":"Asian Journal of Physical and Chemical Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136192536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Search for Qualified Soil for the Production of Low-Energy Biobased Composite Materials","authors":"Sandwidi Sayouba, Haro Kayaba, Dabilgou Téré, Sinon Souleymane, S. Oumar, Koulidiati Jean, Béré Antoine","doi":"10.9734/ajopacs/2023/v11i3207","DOIUrl":"https://doi.org/10.9734/ajopacs/2023/v11i3207","url":null,"abstract":"The development of earth-based bio-sourced materials requires a thorough analysis of the study soil. For the present study, we took five (05) soil samples from a tunnel-digged quarry in the layer between 0.5 m and 5 m : white clay (MSB-BL), red clay (MSB-RG), weak clay or sandy clay (MSB-FB), strong clay (MSB-FR) and mixture (MSB-ME). To verify the quality of these five (05) soils samples, their intrinsic properties were determined at the National Building and Public Works Laboratory (LNBTP). These included grain size, clay content, specific weight, loss on ignition and moisture content. These analyses revealed that MSG-RG and MSG-BL clays have fine fractions of 64.28% and 47.85% respectively; clay fractions of 27.51% and 20.61% respectively; and methylene blue values in the range (6;8). Their plasticity indices are in the range (20;40). These two (02) clays thus meet the requirements in terms of granularity, and their relatively high clay fraction will favor their adhesion with admixtures such as plant fibers. What's more, the particle size distribution of these clays is within the ideal CRAterre range for soils used in the manufacture of BTC or adobes, so they are all eligible.","PeriodicalId":8541,"journal":{"name":"Asian Journal of Physical and Chemical Sciences","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81885550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}