Authors:C. Eneogwe, M.I. Sanni, U.A. Abubakar Pages: 7 - 3(2021) 22 Abstract: The water quality data of Kubanni reservoir, Zaria-Nigeria for 7 years (January 2014 to December 2020) was collected and analyzed. Thirteen (13) water quality parameters were analyzed which includes; pH, turbidity, Electrical Conductivity (EC), temperature, Total Dissolved Solids (TDS), Dissolved Oxygen (DO), Free Carbon dioxide, Total Alkalinity, Chloride (Cl-), Total Hardness, Total Iron, Nitrate (NO3-) and Manganese (Mn). Results were subjected to Factor Analysis (FA) and Principal Component Analysis (PCA) via Minitab 17. FA/PCA extracted 5 Principal Components (PCs) which explain 63.2% of the variation in the water quality. Electrical Conductivity (EC), Total Dissolved Solids (TDS), turbidity, Free Carbon dioxide, Manganese (Mn) and temperature were identified to be the parameters influencing the variability of the reservoir water quality as their absolute factor loading were greater than 0.50. PubDate: 2021-09-30 DOI: 10.48422/IMIST.PRSM/ajees-v7i3.27838 Issue No:Vol. 7, No. 3 (2021)
Authors:Volodymyr Valentynovych Tkach, MartaV Kushnir, YanaG. Ivanushko; Alla V. Velyka, Petro Ye. Kovalchuk, Sílvio C. De Olive, Petro I. Yagodynets´, Zholt O. Kormosh, Lucinda Vaz dos Reis Pages: 7 - 3(2021) 23 Abstract: For the first time, the possibility of overoxidized polypyrrole N-oxidation has been investigated from the theoretical point of view. The correspondent mathematical model has been developed and analyzed by means of the linear stability theory and bifurcation analysis. It was shown that the polypyrroleoveroxidation in the presence of peroxide compounds or at a slightly higher potential will yield a N-oxidized form, and its formation will be accompanied by the enhance of the oscillatory and monotonic instability realization probability. This enhance is among the factors, defining the resulting polymer morphology and conductivity. PubDate: 2021-09-30 DOI: 10.48422/IMIST.PRSM/ajees-v7i3.22468 Issue No:Vol. 7, No. 3 (2021)
Authors:Umar Yunusa, Sulaiman Adamu Idriss; Yunusa Lukman Muhammad, Abdulrahman Hudu Tahir Abdullahi, Umaru Umar Pages: 7 - 3(2021) 24 Abstract: The inhibition efficacy of a novel green corrosion inhibitor based on Jatropha podagrica stem bark extract (JPSE) toward carbon steel (CS) corrosion in 0.5 M H2SO4 solution was explored by integrated experimental and computational studies. The inhibition behavior was probed using weight loss analysis, potentiodynamic polarization (PDP) test, electrochemical impedance spectroscopy (EIS) and surface analysis techniques. In addition, the adsorption process between JPSE compounds and iron atom was theoretically examined by using quantum chemical calculations and molecular dynamics (MD) simulations. The experimental results revealed that 600 mg L-1 JPSE protected the CS surface by ~87%. The polarization tests revealed that the JPSE acted as a mixed type inhibitor with dominant effect on the cathodic reactions restriction. The EIS analysis showed that the increase of JPSE concentration led to the significant increment of charge transfer resistance. Surface analysis via SEM clearly proved that JPSE adsorption on the CS surface remarkably reduced its dissolution rate and resulted in a smooth morphology. UV–visible analysis evidenced the formation of a complex between the functional groups of the considered inhibitor and metal ions. The theoretical results demonstrated the adsorption of JPSE constituents on the CS substrate in parallel mode. PubDate: 2021-09-30 DOI: 10.48422/IMIST.PRSM/ajees-v7i3.27301 Issue No:Vol. 7, No. 3 (2021)
Authors:Ghanim Thiab hasan Pages: 7 - 3(2021) 26 Abstract: As the operating temperatures increase, the efficiency of the solar system will be decreases. Therefore, the examination of the mode of transmission and dissipation of the temperature of the solar panel and its impact on the level of electricity generation of the panel has made a significant contribution to determining the solar panel efficiency. In order to reduce the possibility of excessive heating, in particular its upper part, so, leaving a certain air gap between the hatching roof surface and the panel back at which the solar panel can be allowed heat dissipation. The aim of this work is to study and investigate the impact of the solar panel rear surface temperature on its output. The study was performed experimentally on three heights (10, 20 and 30 cm) in 3 positions. The study was first carried out with three identical panels on one height of the roof, then ,the height of the first panel remains unchanged, while, the other two panels being changed by 20 cm and 30 cm in the woe steps respectively. The results obtained show that the solar panel output level is inversely proportional to the panel rear surface temperature. So, we can conclude that in case of leaving a certain air gap will lead to more dissipation of panel heat which lead to a much increase in the panel output level. PubDate: 2021-09-30 DOI: 10.48422/IMIST.PRSM/ajees-v7i3.27110 Issue No:Vol. 7, No. 3 (2021)
Authors:Volodymyr Valentynovych Tkach, Marta V. Kushnir; Yana G. Ivanushko Alina Yo. Zavolovych, Ruslana V. Sluhenska, Sílvio C. De Oliveira, Petro I. Yagodyne Zholt O. Kormosh, Hanifa Zh. Salomova, Dilfuza M. Musayeva, Olga V. Luganska Pages: 7 - 3(2021) 27 Abstract: In this work, the possibility for indirect electropolymerization of a monomer, synthetized by an indirect electrosynthesis, has been evaluated. The correspondent mathematical model, based on the reaction mechanism, has been developed and analyzed by means of linear stability theory and bifurcation analysis. It has been shown that in the case of indirect monomer electrosynthesis and electropolymerization, the polymer deposition is far more stable than for direct participation of the monomer in the electrochemical stage. The surface tends to be more developed. Yet the electrochemical oscillations are expected to be less probable than in the case of the direct anodic process. PubDate: 2021-09-30 DOI: 10.48422/IMIST.PRSM/ajees-v7i3.24314 Issue No:Vol. 7, No. 3 (2021)
Authors:Amarachi Udoka Nkwoada Pages: 7 - 3(2021) 27 Abstract: Clays are used extensively in water purification and several other industrial processes due to their porosity, large surface area and cation exchange ability. Given their vast potential importance, four Nigeria clay samples were characterized taking into consideration their potential application for water purification and some other industrial interests. The chemical and mineralogy composition were determined using the EDX, XRF and XRD while FTIR investigated the functional groups of the clay minerals. Clay morphological properties were characterized using SEM, CEC, BET and the zeta potential carried out to analyse the stability in aqueous solution. The study revealed that the clays were mainly kaolinite, while the clay minerals were primarily quartz having other associated minerals like anatase and pyrite. The clay samples were found to show satisfactory fitting for water purification owing to their exchangeable cations, zeta potential, and BET results. Additionally, they were also found to be suitable for industrial applications for production of firebricks, production of super-heat duty fireclay refractory materials, inhibition of shrinkage during sintering process, inhibition of bacteria growth, and refractory clays. The study outlines the usefulness of the clay mineral deposits in Nigeria that will improve the natural water purification, thereby creating a cheap and readily available purifier for locals and global usage. PubDate: 2021-09-30 DOI: 10.48422/IMIST.PRSM/ajees-v7i3.27357 Issue No:Vol. 7, No. 3 (2021)
Authors:Ghanim Thiab hasan, Mahmood Ali Ahmed, Mohammed Khalaf Husain Pages: 7 - 3(2021) 29 Abstract: The proper selection of winding parameters for resonant circuits in inductive power transmission systems is an important issue, as it has a significant impact on system performance and power transmission, and these parameters can be optimized. Depending on the relationship between the coil design and the electrical parameters, the optimal number of coils can be selected for different criteria and protection conditions. This paper presents a method for calculating the geometrical and electrical parameters of planar coils used in parallel resonant systems for wireless power transmission (WPT) system, and for selecting the optimal number of coils. The equations for calculating the active resistance and inductance of the coils are normalized based on the given coil design parameters.. Practical examples of application of the selected method to transmitter and receiver windings of WPT systems are given. The obtained results indicates that the system performance and dissipated power are higher when windings with a calculated number of windings are provided. The proposed method can be used to choose the optimal design of toroidal coils in fixed frequency systems, as well as in systems where the operating frequency depends on the of the resonant circuit parameters. PubDate: 2021-09-30 DOI: 10.48422/IMIST.PRSM/ajees-v7i3.27206 Issue No:Vol. 7, No. 3 (2021)
Authors:Bandhavya G B Sandeep Pages: 7 - 3(2021) 30 Abstract: The growing concern about climate change and global warming, resulting from the increased concentration of carbon-di-oxide in the atmosphere has created considerable interest in carbon sequestration. Carbon is usually sequestered in the ocean or deep in the earth's crust. but these processes require a lot of time and need additional energy investment for carbon to be sequestered. It is noted that cement industries contribute to 7% of global CO2 emission and it's estimated that 50% of global cement production will be from India and china by 2050. Also in the current time when trees are being cleared for construction of the building, which is estimated to release 1.5 billion tons of CO2 into our atmosphere every year. Some measures must be taken to give back to the environment. Thus if carbon is stored in concrete it is likely to stay for a longer time. The carbon cure technology enables the production of some reliable concrete but with the reduced carbon footprint. The technology injects a precise dosage of CO2 in concrete during mixing where it mineralizes. The mineralized CO2 improves the concrete compressive strength, enabling reduced cement content in their mixes and achieve further carbon reduction without compromising quality. Concrete made with carbon cure technology provides 4-6% reduction to the global warming potential PubDate: 2021-09-30 DOI: 10.48422/IMIST.PRSM/ajees-v7i3.28111 Issue No:Vol. 7, No. 3 (2021)
Authors:Suraksha Bishnoi, Kafeel Ahmad, Sapna Kumari Pages: 7 - 3(2021) 31 Abstract: Particulate matter is the pollutant generally viewed as most unsafe to human wellbeing. PM comprises a combination of liquid and solid particles suspended in the atmosphere. Its minuscule size permits the particles to enter the circulation system by means of respiration, causing asthma and heart disease. COVID-19 has been declared as a Public Health Emergency of International Concern by WHO on 30th January 2020. The objectives of the present study include air quality (with respect to PM2.5 and PM10) monitoring at pre-selected locations during and post COVID- 19 phase, comparative assessment of air quality parameters PM2.5 and PM10 concentrations in Delhi during and post COVID-19. To conduct this study the station for air quality monitoring selected is near Hauz Khas metro station, Delhi. Total 4 locations are selected around CPCB Air pollution monitoring station, Hauz Khas. PM sampling has been done for 12 continuous days. The dataset of the time frame (March and April of 2020) of the lockdown phase is collected from CPCB and compared with the dataset of the same time frame (March and April 2021) using excel software. The pollution level drastically increases after the lockdown phase according to present observation and improvement in air quality could not last long after the reopening of industries and vehicular activities according to this investigation. PubDate: 2021-09-30 DOI: 10.48422/IMIST.PRSM/ajees-v7i3.27981 Issue No:Vol. 7, No. 3 (2021)
Authors:Inioluwa Oladipupo Olowofila, Itunu Comfort Okeyode, Victor Makinde, Adewole Michael Gbadebo Pages: 7 - 3(2021) 33 Abstract: The natural radioactivity in the soils ofselected tourist centres in Southwest Nigeria was determined using gamma-ray spectrometer comprising a 3” x 3”Nal(TI) detector coupled to a Camberra series 10 MCA. Twenty(20) soil samples were collected from the five tourist centres. Four soil samples each were collected from Idanre hills (ID) in OndoState, Ikogosi warmspring (IKG) in EkitiState, Erin-Ijesha (EI) waterfall in OsunState, Olumo rock (OL) in OgunState,and Old Oyo National Park (OONP) in Oyo State. The Activity Concentrations (AC) were measured in Bqkg-1. The AC at ID ranged from below detection limit (BDL) to 41.93±4.74 for 226Ra, BDL to 49.37±2.90 for 232Th, and 643.27±33.36 to 2040.16±104.33 for 40K with respective mean values of 17.55±2.01, 23.61±1.86, and 1221.90±62.9. At IKG, AC ranged from BDL to 70.43±7.76 for 226Ra and 75.25±3.94 to 550.16±28.69 for 40K with mean values of44.51±4.94 and 255.14±13.38 respectively while 232Th was BDL. At EI, AC ranged from BDL to 35.32±4.18 for 226Ra, 139.60±7.37 to 452.71±23.60 for 40K with mean values of 10.64±0.94 and 285.55±8.81 respectively while 232Th was BDL. At OL, AC ranged fromBDL to 87.78±10.47 for 226Ra, 3.95±0.23 to 84.08±4.99 for 232Th, and 528.49±27.68 to 2159.01±112.85 for 40K with mean values of 21.94±2.57, 52.66±10.34 and 1533.63±79.82respectively. For OONP, AC ranged from BDL to 72.66±7.72 for 226Ra, and 247.04±13.12 to 611.10±32.05 for 40K with mean values of 22.11±2.40 and 450.93±23.33 respectively while 232Th was BDL.The maximum and minimum Absorbed dose rate meanvalues were foundto be 111.40±10.74 in OL and 16.82±1.19 nGyh-1 in EI respectively while that of the outdoor Annual Effective Dose and the Radium equivalent values for all the study centreswere also estimated and comapared to the world limits. PubDate: 2021-09-30 DOI: 10.48422/IMIST.PRSM/ajees-v7i3.27414 Issue No:Vol. 7, No. 3 (2021)
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