Browsing by Author "Tijani, Idowu A."
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Item MODELLNG AND OPTIMISATION OF OIL EXTRACTION FROM LOOFAH (LUFFA CYLINDRICA) SEEDS USING BINARY SOLVENT MIXTURE(Turkish Chemical Society, 2019) Eletta, Omodele A. A.; Adewoye, Latifat T.; Mustapha, Sherif I.; Adeniyi, Adewale G.; Ogunleye, Oladipupo O.; Aladerokun, Oladimaji E.; Tijani, Idowu A.Toxicity and safety concern coupled with the recent increase in its price has necessitated the need for finding alternative solvents to n-hexane. In this study, the effect of binary solvent (ethanol/n-hexane) composition at various extraction temperatures and times on the oil yield was investigated using response surface methodology (RSM). Artificial neural network (ANN) was used as a modelling tool for predicting the oil yield and the performance of both ANN and RSM models was compared. The optimum oil yield (27.67%) was obtained at extraction temperature (40 °C), extraction time (151.9 min) and binary solvent composition (98% ethanol /2% n-hexane). The predicted oil yield values from ANN model was more accurate than that of RSM when compared with experimental values. The fatty acid profile revealed that the refining process promoted saturation of the extracted oil with 67.75% of palmitic acid present in refined loofah seed oil (RLSO). This study demonstrated the feasibility of using a binary mixture of ethanol and n-hexane as a suitable replacement to the commonly used toxic n-hexane solvent for the extraction of oil from loofah seeds.Item Removal of Lead and Chromium from Aqueous Solution onto Flamboyant (Delonix regia) Pod Activated Carbon(2017) Mustapha, Sherif I.; Adewoye, Latifat T.; Aderibigbe, Fatai A.; Alhaji, M. H.; Adekola, Monsurat I.; Tijani, Idowu A.The contamination of water by potentially toxic elements is considered a global problem. It calls for a safe, economic and technological approach in order to curb and prevent the devastating effect of the menace on both human and the aquatic life. In the light of this background, the adsorption potential of flamboyant pod activated carbon (FPAC) for the removal of chromium and lead from aqueous solution was studied. The effect of contact time, pH, initial concentration as well as adsorbent dosage on the removal efficiency of both metal ions was investigated via batch adsorption. Characterization of the FPAC adsorbent was done using Brunaur Emmett Teller and Fourier transform infrared spectroscopy. The maximum adsorption capacity Qe was found to be 34.48 and 16.13 mg/g for Pb (II) and Cr (VI), respectively. The Langmuir isotherm model showed a better fit to the equilibrium data than the Freundlich isotherm model. The mechanism of adsorption for both metal ions onto the FPAC agrees well with pseudo second order kinetic model. The results showed that FPAC has excellent adsorption properties and thus can be used as an effective low-cost adsorbent for the removal of lead and chromium ions from aqueous solution.