NSChE e- Journal Articles
Below are some of the selected articles in the Journal of the NSChE. By clicking on the article title, you will be able to view the abstract of the article, but you require Adobe PDF reader and be a member of the Society to Download the articles
 
STATISTICAL DESIGN ANALYSIS FOR ADSORPTION OF CU (II) AND PB (II) ONTO KAOLINITIC CLAY 
Uwadiae, S. E.*, Aluyor, E. O., Okeimen, C. O. and I. O. Oboh Department of Chemical Engineering, Igbinedion University, Okada, Edo State
Article Abstract
Clay samples from Ikpoba in Benin city were tested, as low-cost adsorbents, for removal of representative heavy metals, of Cu(II) and Pb(II), from aqueous solutions. A full factorial experimental design with two central points was utilized to assess the effect of four factors on the batch adsorption of Cu(II) and Pb (II) in an aqueous solution with the clay (particle size < 0.02mm). The chosen experimental factors at two levels were (A) adsorbent dose at 0.2 and 0.8 g, (B) temperature at 303 and 333K, (C) shaking speed at 100 and 300 rpm and (D) contact time at 10 and 60 minutes. The results indicated that only adsorbent dose had significant effect for both ions. The best conditions for uptake of ions were respectively time of 90 minutes and 60 at 0.2 g adsorbent.
COMPARATIVE STUDY OF THE EFFECTS OF OPEN SUN AND FORCED CONVECTIONAL DRYING ON THE COAGULATION ACTIVITY OF MORINGA OLEIFERA SEED EXTRACTS 
*Muhammad M. M+, N. Salahudeen++, Saulawa S. B+, Aliyu I+ and Jumare S. A+++ +Department of Water Res. & Env. Engineering, Ahmadu Bello University, Zaria ++Department of Chemical Engineering, Ahmadu Bello University, Zaria +++ Department of Food Sci. & Tech., Fed. Polytech. K/Namoda, Zamfara State
Article Abstract
The coagulation activity of Moringa Oleifera seed extract dried at three different seasons (Late Harmattan, Early and Middle Rainy seasons) was investigated. Forced convectional solar drying and open sun drying methods were used to determine the final weight of the dried seed extract at different temperatures. The best dried weight of 0.585 g was obtained during the Early Rainy season at drying temperature of 54 C. The Late Harmattan season gave the optimum coagulation activities of 95.8% and 94.1% for the convectional solar and open sun drying methods respectively at coagulant dosage of 4 ml of coagulant/litre of water. The Early Rainy season gave coagulation activities of 90.9% and 94.1% for the open sun and the solar drying respectively at coagulant dosage of 5 ml of coagulant/litre of water, while the Middle Rainy season gave coagulation activities of 87.5% and 92.5% for the open sun and the solar drying respectively at coagulant dosage of 5 ml of coagulant/litre of water.
ADSORPTIVE REMOVAL OF LEAD FROM AQUEOUS SOLUTION USING RAW AND MODIFIED SHEA BUTTER CAKE 
Muibat Diekola Yahya1* I.A. Mohammed-Dabo2, A.S.Ahmed2, A.S. Olawale2 1Department of Chemical Engineering, Federal, University of Technology, Minna, P.M.B.65, Nigeria. 2Department of Chemical Engineering, Ahmadu Bello University, Zaria,
Article Abstract
The adsorption of lead (Pb) from aqueous solution using Raw Shea Butter Cake (RSBC) and Modified Shea Butter Cake (MSBC) was studied. Fourier Transform-Infrared Spectrophotometer (FT-IR)and Scanning Electron Microscope (SEM) were used to characterize the adsorbent. The chemical functional groups responsible for metallic bio-sorption were the OH, -COOH and NH2. Batch adsorption process was used to study the effect of various parameters ranging from the effects of initial metal ion concentration (10-400 mg/L); pH (2-10); and equilibrium time (0 -240 minutes). Optimum conditions of initial metal ion concentration = 250 mg/l, pH = 6 and equilibrium time = 5 min for MSBC and 30mins for RSBCwere obtained. Adsorption isotherms, namely Langmuir, Freundlich, Temkin, and Dubunin- Radushkevich (D-R) were found to fit the experimental data adequately well. The Langmuir Isotherm gave the best fit with the highest correlation coefficientof 0.9996 for MSBC and maximum sorption capacity of 13.175 mg/bead, while the corresponding values of 0.9998 and 9.328 mg/g were observed for RSBC. The results obtained showed that both the RSBC and MSBC have the potential to serve as adsorbent for the removal of Pb(II) ions in aqueous solutions.
COMPARATIVE STUDY OF JATROPHA OIL BASED BIODIESEL PROPERTIES USING MECHANICAL AND SOLVENT EXTRACTION 
A. O. Ogunbayo and T. O. Ajayi Department of Chemical Engineering, University of Lagos, Lagos, Nigeria.
Article Abstract
presence of sodium hydroxide as the catalyst. Jatropha oil was obtained from the seeds by both mechanical and solvent extraction. The average yield of oil by mechanical extraction was 25.7 wt% while that of solvent extraction was temperature dependent and varied from 47.2 wt% to 49.4 wt%. The composition of the oil obtained by mechanical extraction contained less free fatty acids than that obtained by solvent extraction. The optimum reaction temperature for the transesterification process to produce biodiesel was found to be 65oC. While the properties of the biodiesel produced from both sources of jatopha oil compared favourably well with the standard of the American Society of Testing and Materials (ASTM D6751), it was observed that the biodiesel produced from mechanical extracted oil had a flash point value closer to the standard for biodiesel fuel (ASTMD 6751).
AQUARTIC MODEL FOR THE PREDICTIONOF BLACK LIQUOR VISCOSITY USING CENTRIFUGAL PUMP PARAMETERS 
Alabi, S.B.1*, Williamson, C.J.2 and Lee,J.3 1 Department of Chemical and Petroleum Engineering, University of Uyo, Uyo, Nigeria 2Department of Chemical and Process Engineering, University of Canterbury, Christchurch, New Zealand. 3J Lee Process Control Specialists Perth, Western Australia
Article Abstract
ABSTRACT This study developed a centrifugal pump (CP)-based quartic model for the online prediction of black liquor viscosity. The model was based on the estimated performance data for a given CP model and size, using the Hydraulic Institute (HI) viscosity correction method. This method should minimise the amount of, or eliminate the need for, experimental data required to develop predictive models for black liquor viscosity. Any changes in the liquor viscosity due to changes in solids content, composition or/and pumping temperature reflect accordingly in the measured torque and capacity of the pump at any shaft speed and the operating point of the pump. Consequently, unlike many of the existing black liquor viscosity models which are liquor-dependent and as such, are not suitable for online implementation, the linear model developed in this study should be capable of providing good estimates of the viscosity of any Newtonian kraftblack liquor under industrial conditions. The quartic model with the performance indices R2=0.9995, sum of squared errors (SSE)=0.1908 and percent absolute relative uncertainty (PARU)=10% has strong generalization and moderate robustness properties and as such, is recommended for general online monitoring of black liquor viscosity where moderate sensitivities to changes in the operating points of the pump are not a concern.
TREATMENT OF TANNERY EFFLUENT USING ZnO-ZnFe2O4 COMPOSITE PHOTOCATALYST 
Abdulhamid Hamza1, Haji A. Mohammed1,2 and Saidu M. Waziri1 1Department of Chemical Engineering, Ahmadu Bello University, Zaria. 2Nigerian Institute of Leather and Science Technology, Zaria.
Article Abstract
ZnO-ZnFe2O4composite photo-catalyst has been synthesized and characterized using XRD, XRF and modified BET techniques. The photo-catalyst has been used for the removal of COD, BOD5 and chromium ions from a real tannery effluent under visible light irradiation. The photo-catalytic removal of COD, BOD5 and chromium ions from a real tannery effluent follows pseudo first order kinetics. The experimental values of the apparent rate constant, kapp, are: 0.055 min-1, 0.050 min-1 and 0.046 min-1 for the removal of COD, BOD5 and chromium ions, respectively. Under the experimental conditions, the optimum irradiation time for improving the biodegradability (BOD5/COD ratio) of the effluent is 20mins.

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