ABSTRACT Consumption of contaminated water may result in several water-borne diseases, including hepatitis, typhoid, cholera, dysentery and other diseases that cause diarrhoea. One of the ways this problem can be prevented is by the use of household water treatment and safe storage. As a result of this, the ceramic water filter, which is one of the effective water treatment techniques, was studied and evaluated to provide information that, will help improve their performance and promote thei...
ABSTRACT Topsoil stripping, drilling and blasting extraction, waste rock dumping, loading, and unloading, crushing and screening, and materials transport are among other activities involved in iron ore mining. These activities produce fugitive dust that may contain heavy metals which deteriorate the quality of ambient air. They also cause noise and surface water pollution, not to mention their effects on the soil and vegetation. Corrosion is another issue observed in iron ore mining; corrode...
ABSTRACT This research focused on studying the suitability of a blend of plant extracts for sweet corrosion inhibition on carbon steel in 3.5% NaCl solution. A comparative study was carried out to investigate the efficacy of sweet corrosion inhibition using palm, jatropha and palm-jatropha extracts at concentrations of 100 ppm, 200 ppm, and 400 ppm to show the effect of blending on the inhibitive performance of plant extracts. An analysis of the extracts was carried out and weight losses as ...
ABSTRACT Prodigiosin molecule, whose efficacy in the treatment of cancer has proven positive, has been studied using first-principles Density Functional Theory (DFT) methods as implemented in VASP - Vienna Ab initio Simulation Package. Initial structure of prodigiosin generated using ArgusLab 4.0.1 program was subjected to geometry optimization in the VASP program in order to determine the ground state structure. The optimized interatomic bond lengths and angles are comprehensively character...
ABSTRACT In this study, the fracture toughness and resistance curve behaviour of laminated panels, produced from the tropical Nigerian bamboo species Bambusa vulgaris, were investigated to assess its potential for use as an alternative construction material. Round bamboo culms were processed into laminated panels. The Mode I fracture toughness KIC, and the resistance-curve (R-curve) behaviour of the laminates in the crack arrester and divider orientations were investigated using ASTM E399 si...
ABSTRACT Improper disposal of commodity plastics e.g. polyethylene (PE) in the environment causes land pollution, soil infertility, is unsightly and poses dangers to plant and animal life. The current effort describes the bacteria mediated biodegradation of commodity plastics by Serratia marcescens marcescens without first subjecting the plastics to thermo-oxidative ageing. It further elaborates on the mechanism and breakdown that are involved in the biodegradation of PE. 90 ml of carbonless...
ABSTRACT Titanium alloy is popular in biomedical application owing to its low density, good biocompatibility (i.e. biological and chemical inertness) and excellent mechanical properties. Due to the high disparity between the implant and bone Young’s moduli, the alloy causes stress shielding in the body. Porous Ti alloy implants have proven to be effective in addressing this issue, so in this work, we created a porous Ti-6Al-4V implant by sieving the as-received Ti-6Al4V powder into differe...
Abstract Sodium-ion batteries (SIBs) have been identified as an effective technology for grid-scale energy storage because of relatively low cost and natural abundance of sodium, but the lack of suitable anode materials with high Coulombic efficiency and reversible capacity has been a challenge. While graphite, an anode material in Lithium-ion batteries (LIBs), has been used for storing Na ions, its performance in terms of efficiency and capacity has been unsatisfactory for practical applica...
ABSTRACT Existing data show that Portland cement material production contributes ~8% to the global CO2 emissions. This is detrimental to the environment and can lead to global warming. It is therefore pertinent to develop alternative cost-effective and environmentally friendly cement material. The geopolymerization technology presents a solution. This project is aimed at using a Nigerian metakaolin-based geopolymer as a sustainable alternative to Portland cement. Kaolin clay sourced from Kan...
ABSTRACT There is a need for efficient energy storage to meet the world’s continuous demand for energy. The electrical energy storage devices available are conventional capacitors, electrochemical supercapacitors, batteries and fuel cells. The electrode materials play an important role in improving the efficiency of energy storage systems such as batteries and electrochemical supercapacitors. The electrochemical supercapacitors have power densities greater than those of batteries, energy d...
ABSTRACT Materials selection is done regarding to the availability, cost and performance of the candidates. In buildings, cement is the material that is widely used, even though it is releases co2 (estimated about 7% of the worldwide production of co2). There is therefore a need to look for new materials that are more environmental friendly. Prior research on earth-based materials has shown that termite soil may serve as an alternative to cements in the stabilization of building materials. T...
ABSTRACT This work aimed at using processed cassava leaves to pack cyanide mild steel (MS) under different treatment conditions and investigating the wear properties of the pack cyanided mild steel (PCMS). Pack cyaniding (PC) of a MS was achieved using processed cassava leaves powder with BaCO3 as energizer in the heat treatment process. Four different powder particle sizes were utilized at four different temperatures (750oC, 800oC, 850oC and 900oC) and soaked for 3 hours. In this present wo...
ABSTRACT Methanol is normally used in the oil and gas industries for inhibiting gas hydrate. Before use, the methanol is normally stored in tanks often made of carbon steels and stainless steels, and these tanks are prone to corrosion when exposed to methanol. Many investigations have been carried out by researchers to understand the phenomenon of stress corrosion cracking (SCC) in ethanol. Very few investigations have, however, been carried out on methanol stress corrosion cracking. Even th...
ABSTRACT This work is aimed at studying activated carbons as supercapacitor electrode materials derived from plant biomass waste materials. The activated carbon raw materials are sourced from coconut shell, pine cone and rice husk plant biomass. The chemical activation route is employed with KOH as an activating agent. The carbonization temperature used is 800 oC and the carbonization time is varied from 1 h to 5 h. Activated carbon of high surface area and porosity are achieved and their el...
ABSTRACT This research focuses on the design of a robust but flexible prodigiosin eluting stent coating for possible coronary cardiovascular implant. When coated with the drug embedded polymer matrix, the stent would be expected to dilate the vessel around the fatty blockages while the drug eluting polymer membrane delivers anti-proliferative drugs over a period of time to prevent the restenosis that otherwise would occur. The goal of this work is to incorporate anti-cancerous drug prodigios...