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...
ABSTRACT Epoxy, a thermosetting polymer due to its attractive properties, has been widely used in many industries as a coating material such as the oil and gas industries. This study provides an insight into the corrosion behavior of epoxy looking at its adsorption properties at the epoxy steel interface and the adhesion behavior for different corrosion environments. The study was carried out using conventional weight-loss measurements and microscopic observation after immersion in Hcl of va...
ABSTRACT This study examined the mechanical properties of earth-based materials that are relevant to the future development of affordable housing. Earthcrete structures were produced by mixing various proportions of laterites, clay and cement, while natural fibre-reinforced composites were produced by mixing earth-based matrices with natural fibre (Straw). Mechanical testing showed that optimum performance of the various samples was obtained at a fibre content of 20% by volume, with compress...
ABSTRACT The majority of human population especially in developing countries suffers from waterborne diseases such as skin abscesses, cellulitis, skin infections, and diarrhoea due to improperly treated water. Safe drinking water remains unavailable to a large portion of the global population and this is a global concern. This work focused on the design, construction and evaluation of charcoal, activated carbon, Moringa seed and sand water filtration systems with an objective of evaluating t...
Abstract In the recent decade, hybrid organic- inorganic trihalide perovskite solar cells have attracted significant interest from the scientific community due to their unique optoelectrical properties, ease and low cost of fabrication. Extensive research has been carried out to understand the electrical and optical properties of this novel material with a view to boosting the efficiency of the system. However, not much has been done to understand the mechanical properties of the system. The...
ABSTRACT The presence of heavy metals in water and soil by metalliferous mining activities at MNG-Gold Mine was fully investigated. The extraction of gold in recent years, has led to the generation of huge quantities of solid and liquid wastes. During the course of the investigation, fourteen samples including surface water, groundwater and soil were collected and analyzed to determine physio-chemical parameters and heavy metal contents. Atomic Absorption spectrometer (AAS FS 240) was used t...