Browsing by Author "Adewoye, Latifat T."

Now showing 1 - 6 of 6
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    ASSESSMENT OF A GROUNDWATER QUALITY FOR DRINKING PURPOSE IN ILORIN, NIGERIA
    (2016) Eletta, Omodele A. A.; Adeniran, Jamiu A.; Adewoye, Latifat T.; Adenle, Adebobola A.
    Groundwater is a major source of water supply in Nigeria where there is an inadequate supply of water for domestic, industrial and agricultural uses. This paper examines the suitability of water samples from a target hand dug well (TW) in a residential area in Ilorin, Nigeria for drinking purpose. The samples were characterized to determine physico - chemical properties over eight weeks due to the observed, oily, greenish blue water discharged from the groundwater source. Another well in the neighborhood was investigated as a control (C). Concentration of selected anions, cations and the presence of hydrocarbons were established in the contaminated well with focus on nutrients and hydrocarbons related to sewer, paint and petroleum compounds to establish the possibility of leakages from sewers, the auto repair/painting workshop and the petroleum products pipeline which are located uphill of the well. The results of physico -chemical characterization carried out on the TW showed pH:7.3 – 7.9; turbidity: 1.2 – 4.5 NTU; total hardness; 175.30 – 222.02 mg/l; TDS: 90 – 125 mg/l. Concentration of cations and anions ranged between 0.16 – 0.24 for Fe; Mn: 0.01 – 0.06; Zn: 0.18 – 0.45; NO32-: 5.95 – 12.76; SO42-: 192.1 – 235.85; Cl-: 230.63 - 283.32 all in mg/l. A Gas Chromatography Mass Spectroscopic analysis (GC-MS) carried out on the water samples from TW showed that, 24.83% of the peaks are within 90 – 100% quality range which confirms the compounds suggested from the installed NIST11 library are correct within minimal error limit.
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    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.
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    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 J
    A 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.
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    Optimization of the Preparation Conditions for Activated Carbon from Locust Bean Pod (Parkia biglobosa) Using Factorial Design Approach
    (2018) Eletta, Omodele A. A.; Mustapha, Sherif I.; Tijani, Jimoh O.; Adewoye, Latifat T.; Mohammed, Ishaq A.
    This study focused on the optimization of the preparation parameters (impregnation concentration, activation temperature and activation time) on the yield and adsorption potential of activated carbon (AC) prepared from Locust bean pod (Parkia biglobosa) using the chemical activation method based on factorial design. The two linear regression models developed from the factorial experimental design using Design Expert Software – 6.0.8 was used to determine the optimum production conditions required to provide a compromise between the AC yield and methylene blue (MB) removal efficiency from aqueous solution. The results demonstrated maximum AC yield of 41.6% and MB removal efficiency of 95.4% under the following optimum preparation conditions; H3PO4 impregnation concentration (60 %), activation temperature (444.4 oC) and activation time (30 min). This study showed that the experimental values obtained were in good agreement with the values predicted from the models under the applied conditions.
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    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, Kenneth
    This 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.
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    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.