Browsing by Author "Ishaq Alhassan Mohammed"

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    Green synthesis of zinc oxide nanoparticles for the removal of phenol from textile wastewater
    (Discover Chemical Engineering, 2024-08-24) Fatai Alade Aderibigbe; Sherif Ishola Mustapha; Ishaq Alhassan Mohammed; Tunmise Latifat Adewoye; Esther Olubunmi Babatunde; Habeebllah Ifeoluwa Aminullah; Kabiru Bab Muritala
    Abstract OPEN This study investigated the use of zinc oxide nanoparticles (ZnO NPs) as an adsorbent for removing total phenols from textile wastewater. The ZnO NPs were synthesized by reducing Zn(NO3)2⋅6H2O using an extract from Neem leaves (Azadirachta indica). Characterization of the adsorbent was performed using Fourier Transform Infrared (FTIR) spectros copy to identify functional group modifications, high-resolution scanning electron microscopy (HRSEM) for structural orientation, energy dispersive spectroscopy (EDS) for elemental analysis, and X-Ray diffraction analysis (XRD) for crys tallinity, revealing particle crystallinity around 200 nm. Adsorption experiments were conducted over contact times of 20–60 min, with adsorbent loadings between 0.2 and 1 g/100 mL, and temperatures ranging from 30 to 50 °C. Optimal phenol removal, achieving 55.93% (0.67 mg/L), occurred at 43.40 min, 33.70 °C, and an adsorbent dosage of 0.69 g/L of textile wastewater. The phenol adsorption process using ZnO NPs was exothermic, spontaneous, and required low energy, fitting well with the Langmuir isotherm and following a pseudo-second-order kinetic model. Keywords Neem · Pollutants · Nanoadsorbents · Adsorption · Crystallinity · Isotherms
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    Qualitative role of heterogeneous catalysts in biodiesel production from Jatropha curcas oil
    (Biofuel Research Journal 26 (2020) 1159-1169, 2020) Fatai Alade Aderibigbe; Sherif Ishola Mustapha; Tunmise Latifat Adewoye; Ishaq Alhassan Mohammed; Adebola Bukola Gbadegesin; Faith Emmanuel Niyi; Opeyemi Idowu Olowu; Akinpelumi Gabriel Soretire; Harvis Bamidele Saka
    Biodiesel properties are in general attributed to the composition and properties of the oil feedstock used, overlooking the possible impacts of the catalyst preparation details. In light of that, the impacts of different catalyst preparation techniques alongside those of different support materials on the yield, composition, and fuel properties of biodiesels produced from the same oil feedstock were investigated. More specifically, tri-metallic (Fe-Co-Ni) catalystwas synthesized through two different techniques (green synthesis and wet impregnation) using MgO orZnOas support material. The generated catalyst pairs, i.e., Fe-Co-Ni/MgOand Fe-Co Ni/ZnOprepared by wet impregnation and Fe-Co-Ni-MgOand Fe-Co-Ni-ZnOprepared by green synthesis(using leaf extracts) were used in the transesterification process of Jatropha curcasoil. Detailed morphological properties, composition, thermal stability, crystalline nature, and functional groups characterization of the catalysts were also carried out. UsingBox-Behnken Design response surface methodology, it was found that the green-synthesized Fe-Co-Ni-MgOcatalyst resulted inthe highest biodieselyield of 97.9%. More importantly, the fatty acid methyl ester (FAME)profiles of the biodieselsproduced using the four catalysts as well as their respective fuel properties were different in spite ofusing thesame oilfeedstock.