Browsing by Author "Akeem Adebayo Jimoh"

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    Investigation of groundwater quality around municipal waste disposal site in Malete southwestern Nigeria
    (Arabian Journal of Geosciences, 2023-03-27) Nurudeen Kolawole Olasunkanmi; Zayyanu Magawata Usman; Akeem Adebayo Jimoh
    The study employed an integrated application of electrical resistivity tomography (ERT), soil classifcations, and physico-chemical parameters of water samples to map the extent and dynamics of leachate migration from the municipal waste dump and its potential impact on groundwater in a crystalline basement complex area, Malete, Nigeria. The ERT model revealed leachate dispersion beneath poorly graded inorganic silt-sand topsoil to about 2 m, hoisting low resistive moisturized soil within the range 1.8 × 10−3 to 6.4 × 10−1 Ωm and underlain by an impervious thin silty-clay layer (about 0.5-m thick) and weathered basement downward. The imprint of induced near-surface leachate percolation is revealed with increased (but acceptable) turbidity, conductivity, DO, and BOD within the shallow wells but prevented by the impervious silt–clay liner from vertical migration to the deeper water source. The concentrations of As, Cd, Cr, Fe, Pb, Zn, and Cu in the water samples and the acceptable TDS and TSS parameters; with low nitrate, sulfate and phosphate concentration are within the recommended range approved by WHO permissible limit for potable water and could have no adverse efects on the public’s health.
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    Isotherms, kinetics and thermodynamic sorption of paranitroaniline on Cocos nucifera shell activated carbon@TiO2 composite
    (Vietnam J. Chem., 2024-10-14) Samsudeen Olanrewaju Azeez; Muhammed Hatim Garuba; Ismaila Olalekan Saheed; Akeem Adebayo Jimoh; Musa Alfanla Kamaldeen; Damilola Tope Ogundele
    A comparative study was conducted on the adsorption capacity of Cocos nucifera shell-activated carbon (CNSA) and Cocos nucifera shell-activated carbon@TiO2 composite (CNSA-TiO2) for para-nitroaniline in an aqueous medium. The CNSA was carbonized at 500 ◦C and activated with 1 M HNO3 while the CNSA-TiO2 composite was prepared by wet impregnation method. The prepared adsorbents were characterized through Brunauer–Emmett–Teller (BET), energy dispersive X-ray (EDX) spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, and scanning electron microscopy (SEM). The BET-surface area of CNSA-TiO2 (748.96 m2/g) was established to be larger than CNSA (574.21 m2/g), however both materials are mesoporous. The effects of initial p-NA concentration, pH, adsorbent dosage, contact time, and temperature, were explored for both adsorbents. The results showed that the adsorption operating parameters influenced the adsorption process except for temperature, with maximum adsorption of 38.26 and 38.36 mg/g for CNSA and CNSA-TiO2, respectively. Freundlich, Langmuir, Temkin, and DubininRadushkevich isotherms were tested on the adsorption data, and the adsorption process of both adsorbents followed the Freundlich isotherm model (R2 > 0.988). Among the kinetic models studied, the pseudo-second-order model (R2 = 1) best described both processes. The thermodynamic parameters such as ∆G◦, ∆H◦ and ∆S ◦ were calculated. The process was exothermic, spontaneous and feasible.