Removal of calmagite dye from aqueous media using nanoparticles of mango seed kernel?impregnated Fe (III)

This manuscript combines both the advantages of the high surface area of nanoparticles and the strong high affinity of Fe(III) for reacting with calmagite dye. So, a novel, simple, benign and eco-friendly nanoparticles adsorbent of mango seed kernel?impregnated Fe(III) (NPs-MSK-Fe) was developed. It was characterized by Fourier transform infrared spectroscopy, transition and scanning electron microscopy and X-ray diffraction. The adsorption characteristics were examined using effective parameters including the effect of pH, equilibrium time, adsorbent amount and dye concentration. The adsorption percent of calmagite using NPs-MSK-Fe was found to be 98.86 % at pH = 2.0. Regeneration of the NPs-MSK-Fe was achieved in acidic ethanol solutions to recover both the adsorbent and the desorbed dye. The regenerated adsorbent can be reused for calmagite removal and the adsorption percent is still 98.86 % after reused for three times. Finally, the new adsorbent was used successfully for the removal of calmagite dye from different environmental water samples.