RP-School of Pure and Applied Sciences

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Browsing RP-School of Pure and Applied Sciences by Author "Abdulhameed, Adamu"

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    Removal of Fluoride Ion by Silicon Nitride Powder
    (Sci Forschen, 2017) Abdulhameed, Adamu; Mbuvi, Harun M.; Changamu, E. O.
    Adsorption of fluoride was done from its aqueous solution by using silicon nitride. In this study, silicon nitrides, SNA, SNB, SNC and SND were synthesized by hydrothermal process done at temperature of 100°C, 150°C, 200°C and 300°C using Rice husk ash (RHA) and sugarcane bagasse ash (SBA) respectively. A batch study on fluoride sorption was carried out at various experimental conditions, including different pH, initial fluoride concentration, and adsorbent dose, shaking speed, contact time and temperatures. Optimum adsorption efficiencies were achieved at pH 2 for SNA, SNB, SNC and pH 4 for SND, contact time 100 minutes, temperature 25°C and shaking speed 600 rpm. The sorption data was found to best into Langmuir isotherm. The adsorption capacities for fluoride ions were 7.9, 8.9, 13.9 and 49.8 mg/g for SNA, SNB, SNC and SND respectively. This results indicate that the silicon nitride constitute a promising material for the development of an adsorption technology for the removal of fluoride ions from aqueous systems.
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    Synthesis of Cellulose-Based Superabsorbent Hydrogel from Rice Husk Using a Microwave
    (American Journal of Materials Science, 2020) Abdulhameed, Adamu; Mbuvi, Harun M.; Changamu, Evans O.
    The present work focuses on the synthesis of a new environmentally friendly superabsorbent hydrogel derived from a cellulose derivative using 1, 2-ethanediol (glycol) as crosslinking agent. The cellulose isolated from rice husk, which has a basis to modify and obtain carboxymethylcellulose CMC using sodium hydroxide (NaOH) and monochloroacetic acid (MCA). Fourier transform infrared (FTIR) and X-ray diffraction (XRD) were performed in other to investigate the reactivity of the superabsorbent hydrogel. The Optimum conditions of power, time, CMC dose and amount of cross-linker required for the production of most desirable, stable and high water absorptivity were investigated, the optimum swelling capacity was found to be 1162%.