Adsorption of methylene blue dye from aqueous solution using iminodiacetic acid supported montmorillonite adsorbent

A. A. PAM, A. A. ADEYI, G. K. OBIYENWA, I. YINUSA, O. W. SALAWU

Abstract


Iminodiacetic acid supported montmorillonite adsorbent was used for adsorptive removal of methylene blue dye in aqueous solution. Brunauer-Emmett-Teller (BET) isotherms, X-ray powder diffraction (XRD), Fourier transform infrared (FT-IR) spectrometer, and Scanning electron microscope (SEM) were used to characterize the physico-chemical properties of the adsorbents.  Iminodiacetic acid supported montmorillonite (MMT-IDA) adsorption capacity was found higher than montmorillonite (MMT) towards MB dye. Adsorption isotherm of the MMT-IDA was well fitted by the Langmuir model, with maximum adsorption capacity of 27.47 mg/g. The adsorption process was spontaneous exothermic, and kinetically fitted to pseudo-second order kinetic model. Thus, the obtained results encourage the use synthesis of iodate composite in the development of low-cost and effective adsorbent to remove MB present in industrial effluents.

Iminodiacetic acid, montmorillonite, methylene blue, adsorption isotherm, composite


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Chemical Society of Nigeria