Browsing by Author "Adeniyi, Adewale G."
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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 Optimization of nickel (ii) and chromium (iii) removal from contaminated water using sorghum bicolor(2017-06-30) Adewoye, Latifat T.; Mustapha, Sherif I.; Adeniyi, Adewale G.; Tijani, Jimoh O.; Amoloye, Mubarak A.; Ayinde, Lawal JA central composite design (CCD) under the response surface methodology (RSM) was used to study the effect of three adsorption variables (pH, initial concentration, and adsorbent dosage) in order to determine the optimum process conditions for the adsorptions of Ni (II) and Cr (III) onto sulphuric acid modified sorghum bicolor activated carbon (SBAC). This study yielded removal efficiency of 98.89% for Ni (II) and 94.27% for Cr (III) ion under optimal conditions of pH (8), initial metal ion concentration (25 mg/L), adsorbent dosage (10 mg) and pH (7), initial metal ion concentration (5 mg/L), dosage (15 mg); respectively. Statistical analysis of variance results showed a good correlation existed between the experimental and predicted data with R 2 values of 0.99 for Ni and 0.98 for Cr. The equilibrium data for Ni (II) adsorption was best described using Freundlich model while Langmuir model best fit Cr (III) adsorption. The mechanism of adsorption for both Ni and Cr adsorptions on SBAC followed Pseudo second order kinetic model.Item PROCESS OPTIMISATION AND CHARACTERISATION OF FRAGRANCE SUITED MECHANICALLY EXPRESSED NIGERIAN LIME SEED OIL(2018-04) Adeniyi, Adewale G.; Adewoye, Latifat T.; Eletta, Omodele A. A.; Ogunleye, Oladipupo O.; Olukotun, KennethThis study determined the optimal process parameters for the extraction of Lime (Citrus aurantifolia) Seed Oil (LSO) for fragrance production. A Box Behnken Design (BBD) of Response Surface Methodology (RSM) was used to design the LSO extraction using hydraulic press. The effect of various combinations of temperature, heating time and pressing time on oil yield, specific gravity, acid value, saponification value, FFA, Iodine and peroxide values were investigated. The oil produced was analysed using Gas Chromatography – Mass Spectrophotometer (GC-MS). The R2 - values of models ranged between 0.998 and 0.999 and adjusted R2 between 0.994 and 0.998. A maximum of 29.21 % of LSO yield was obtained with specific gravity (0.861), acid value (2.86 mg KOH/g); saponification value (185.3 mg KOH/g), FFA (≤ 1.43 %), Iodine value (107.8 g I2/100 g) and peroxide value (15meq/kg) at the optimal process parameters of 83oC, 8 min and 7 min temperature heating and pressing time respectively. The physico-chemical analysis of the lime seed oil indicated that the oil could be used for fragrance.