Browsing by Author "Damilola Tope Ogundele"

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    Effect of Pharmaceutical Effluent on the Growth of Crops in Nigeria
    (2018) Damilola Tope Ogundele; Afees Adebayo Oladejo; Christiana Oreoluwa Oke
    Environmental pollution constitutes a great health hazard to human, animals and plants with local, regional and global implications. Pollution has adverse effects on land, water and its biotic and abiotic components. Effluents from industries are normally considered as the main industrial pollutants containing organic and inorganic compounds. This experiment was conducted under laboratory condition to investigate the effect of different heavy metals in pharmaceutical effluent on germination and growth of okro (Abelmoschus esculentus) and tomato (Lycopersicon esculentum) seed. The effect of these effluents was compared with control water. The soil on which the plants were grown was analysed. A control sample watered with de-ionised water was also analysed. The plant samples were divided into stem, root and leaf prior to digestion and analysed. The soil and plant samples were digested by wet-oxidation technique and analysed for heavy metals by atomic absorption spectrophotometer (AAS). Lead, Cadmium, Chromium, Zinc, Copper, Nickel and Iron concentrations were found in tomato (Lycopersicon esculentum) and okro (Abelmoschus esculentus) plants watered with different concentrations of pharmaceutical effluent. The results stated that the industrial effluents significantly affect germination; root, stem and shoot elongation of the investigated crops with the highest concentration found in the root of the investigated plants when compared to the stem and leaf. Hence, it can be concluded that effluents from pharmaceutical companies is toxic to life.
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    Effect of Pharmaceutical Effluent on the Growth of Crops in Nigeria
    (Chemical Science International Journal, 2018-12-31) Damilola Tope Ogundele; Afees Adebayo Oladejo; Christiana Oreoluwa Oke
    Environmental pollution constitutes a great health hazard to human, animals and plants with local, regional and global implications. Pollution has adverse effects on land, water and its biotic and abiotic components. Effluents from industries are normally considered as the main industrial pollutants containing organic and inorganic compounds. This experiment was conducted under laboratory condition to investigate the effect of different heavy metals in pharmaceutical effluent on germination and growth of okro (Abelmoschus esculentus) and tomato (Lycopersicon esculentum) seed. The effect of these effluents was compared with control water. The soil on which the plants were grown was analysed. A control sample watered with de-ionised water was also analysed. The plant
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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.