Browsing by Author "V. T. BODUNDE*, F. A. ADEKOLA, and N. ABDUS-SALAM"

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    INVESTIGATION OF SORPTION OF CHROMATE ION ON A SYNTHETIC HEMATITE
    (2013) V. T. BODUNDE*, F. A. ADEKOLA, and N. ABDUS-SALAM
    A Hematite sample was synthesized using precipitation method and it was characterized using a combination of analytical techniques such as infrared spectroscopy, X-ray diffractometry and atomic absorption spectrometry. The hematite was then studied for its potential to remove chromate ion from aqueous solution. The maximum adsorption capacity was found to be 1.91 mg/g. The influence of contact time, ionic strength and pH on the sorption capacity was also investigated. Maximum adsorption was observed in the range pH 4.0 and pH 6.0 at an optimum time of 3 hours 20 mins. The experimental results were finally analyzed using Langmuir, Freundlich and Temkin isotherms. The Temkin isotherm was found to have the most satisfactory fitting for the sorption data. The sorption kinetics was studied for the pseudo-first order and pseudo-second order models.