ABSTRACT This research is based on the modification of a glassy carbon electrode with cobalt (II) tetra carboxy phthalocyanine and nitrogen doped graphene oxide nanosheets composite (CoTCPc/N-GONS) was used for the electrocatalytic oxidation of nitrites. The synthesised cobalt (II) tetra carboxy phthalocyanine (CoTCPc) and nitrogen doped graphene oxide nanosheets (N-GONS) were characterized by FTIR spectroscopy, UV-Vis spectroscopy, electrochemical impedance and cyclic voltammetry. The electr...
ABSTRACT The biodesulfurization of diesel and kerosene was investigated. Soil samples were taken at various points of the Ijora petroleum products haulage terminal, in Lagos, Nigeria. Microorganisms capable of selectively abstracting sulfur from diesel and kerosene without reducing their fuel values were isolated by using a sulfur-reducing selective medium. The choice of the sulfur selective reductive pathway is informed by the fact that it is sulfur specific and so the calorific value is ma...
ABSTRACT High concentrations of methylene blue (MB) in aqueous environments have detrimental effects to both plants and animals and hence its removal is very important. Metal-Organic Framework, HKUST-1 and composite, CuO@HKUST-1, were synthesized and characterised for their functional groups before and after degradation of methylene blue. Studies were done to optimize the degradation of methylene blue and to characterize the degradation system with respect to photocatalytic degradation kinet...
ABSTRACT The investigation of nitrate adsorption onto Brachystegia spiciformis leaf powder from waste waters was performed. Characterization for the functional groups of the biomass before and after nitrate sorption as well as after desorption was done using an FTIR spectrophotometer. The effect of pH, contact time, dosage and initial nitrate concentration was investigated. The Brachystegia spiciformis leaf powder had amine, carboxylic and hydroxyl groups that were involved in nitrate remova...
ABSTRACT The activity of indigenous microbial system is a required tool to remediate an environment that has been contaminated by hydrocarbons. This work deals with the dynamic response to crude oil contaminants of undefined microbial systems in three selected communities of the Rivers State of Nigeria. The activities of indigenous (undefined) consortia were studied and compared using Respiratory technique. The soil samples were incubated with 2 % ( 𝑣⁄𝑣)crude oil in mineral salt medi...
ABSTRACT This dissertation investigated the substitution of Kaolin with Coal Fly Ash (CFA) as raw material for the manufacture of cement. The research sought to establish the optimum quantity of CFA, Sand and Limestone required to produce a cement that had improved early day strength and latter strengths of cement due to substitution of kaolin with CFA. This was a novel and creative research where a total of twenty experiments formulated from the central composite design were carried out to ...
ABSTRACT The most pertinent problem which must be solved in the design of multicomponent distillation process is the evaluation of the vapour-liquid equilibrium (VLE) ratio and enthalpy (liquid and vapour) values of each component in each of the stages. Good experimental data are not easily obtained but require considerable experimental skill, experience and patience. It is therefore of economical necessity to consider techniques for estimating vapour-liquid equilibrium and enthalpies data fo...
ABSTRACT In this study, the use of purely inorganic filler materials to influence the mechanical properties of flexible polyurethane foam has been investigated. The fillers were calcite (CaCO3), dolomite (CaMg(CO))), and kaolin (ALSO(OH)) of volume fractions ranging from 0 - 40 wt%. Each of the filler content ranges was investigated at the following average particle size distributions: 0.06, 0.5, 3.5, 10, 20, and 841 um. The experiment was performed in a discontinuous foaming process based on...
ABSTRACT The focus of this research work is the unraveling of the microbial dynamics of the biodegradation of a mixture of polycyclic aromatic hydrocarbons (PAH), naphthalene, anthracene and pyrone in an aqueous- soil matrix. The soil used in these studies was characterized as highly porous with a sandy-clay ratio of 85-14%. The microbial growth study was characterized by an initial lag phase, a rapid and an exponential increase in cell biomass, a stationary phase and finally a death phase. T...
ABSTRACT Graphene nanoribbons (GNRs), titanium dioxide (TiO2), and their composites Graphene nanoribbons/titanium dioxide (GNRs/TiO2) were employed towards the simultaneous detection of nevirapine (NVP) and glucose (GLC). The nanomaterials were characterized Fourier-transform infrared spectroscopy (FTIR), UV-vis and thermogravimetric analysis (TGA), cyclic voltammetry, electrochemical impedance spectroscopy, linear sweep voltammetry, differential pulse voltammetry, and chronoamperometry were ...
BSTRACT Phytosynthesis of TiO2 NPs from Ximenia Caffra leaf extract and their application in poultry feeds as an antibacterial agent was done. Reaction time and pH effect for the synthesis of TiO2 NPs were optimized using a single factor method. A Central Composite Design (CCD) was used to determine the effect of linear factors (titanium tetrachloride concentration, temperature and leaf extract volume) and their interactions on the synthesis of TiO2 NPs. A total of twenty experiments formulat...
ABSTRACT A new simple novel electrochemical sensing platform based onelectrodeposition ofnano zinc oxide ontomultiwalled carbon nanotubes modified glassy carbon electrode was constructed. The modified electrode was characterized by cyclic voltammetry and electrochemical impedance in a redox probe.The electrode surface area after modification was 0.15 cm2, which was twice large that of a bare glassy carbon electrode. The new fabricated sensor was applied for individual and simultaneous determi...
ABSTRACT The kinetic analysis of three complex reaction networks of catalytic reforming reaction systems has been studied. The complex systems of reaction networks were first fashioned into a system of single reactions. Each single reaction is then delineated into a sequence of elementary reaction steps. The principles of rate determining step, steady state approximations and microscopic reversibility were then involved for necessary simplifications Kinetic and equilibrium parameters for mode...
ABSTRACT An electrochemical sensor based on polyaniline cobalt phtahlocyanito doped with cobalt oxide nanoparticles was developed for the electrocatalytic oxidation of amitrole.FTIR, Electrochemical impedance spectroscopy (EIS) and Bode plots were used in the characterization of the synthesized modifiers CoTCPc, PANI, Co2O3NPs and to ascertain the chemical linkage between CoTCPc and PANI while cyclic voltammetry, linear sweep, chronoamperometry and differential pulse voltammetry were used to ...
ABSTRACT An electrochemical sensor based on nickel tetraamine phthalocyanine and nitrogen doped grapheme oxide (NITAPC-NDGONS (mix)) nanoparticles was developed for the simultaneous electrocatalytic oxidation of vanillin and ascorbic acid. FTIR (Fourier Transimition Infrared), electrochemical impedance spectroscopy (EIS) and Bode plots were used in the characterization of the synthesized modifiers (NITAPC), (GONS-NITAPC) and NITAPC-NDGONS (mix)). Cyclic voltammetry, linear sweep, chronoampero...