EDTA Modified Irvingia gabonensis: An Efficient Bioresource Material for the Removal of Rhodamine B.
EDTA modified dika nut (Irvingia gabonensis) (EMDN) was prepared, its physicochemical characteristics were determined and characterized using fourier transform infrared (FT-IR) spectroscopy and scanning electron microscopy (SEM). Brunauer–Emmett–Teller (BET) surface area of EMDN was obtained to be 8.092 m2/g. Its efficiency in the uptake of Rhodamine B (RhB) from aqueous effluent was investigated and maximum adsorption was recorded at pH 6. Adsorption data fitted best into the Freundlich adsorption isotherm than the Langmuir, Temkin and Dubinin Raduskevich (D-R) models, the maximum monolayer adsorption capacity (qmax) obtained from the Langmuir equation was obtained to be 532.27 mg/g and the mean sorption energy (E) calculated from the D-R model was less than 8 kJmol-1 suggesting that the adsorption process was physical in nature. Pseudo second order better described the kinetics of adsorption than the pseudo first order. Desorption percentage of RhB from EMDN surface was found to be low for all the desorbing eluents used and HCl has the highest desorption percentage of 17.75%.
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