Adsorption of Ponceau Xylidine dye by synthesised Mn₂O₃ nanoparticles

ABSTRACT

Mn₂O₃ was synthesised by solid state decomposition of Mn(II)-ascorbate precursor. The precursor was characterised by elemental analyses, TGA, FT-IR and electronic spectra. The as-prepared precursor was decomposed at 700°C in air forming cubic Mn₂O₃ with average size 55 nm. It was characterised by XRD, TEM, SAED and FESEM. The electron microscope images indicated the formation of meso- and macrospores Mn₂O₃. Adsorption of Ponceau Xylidine dye onto Mn₂O₃ nanoparticles at different conditions, as amount of Mn₂O₃, time of contact and pH, was studied. It was found that, Mn₂O₃ NPs could remove 98.3% of Ponceau Xylidine from aqueous media. The adsorption isotherms and kinetics of the adsorption process were studied. Both surface adsorption (chemisorptions) and intra-particle diffusion mechanisms simultaneously cooperated in the adsorption of Ponceau Xylidine on Mn₂O₃ nanoparticles. The antimicrobial activity of Mn₂O₃ NPs on Escherichia coli, Staphylococcus aureus and Candida albicans was investigated. Mn₂O₃ nanoparticles showed good activity against the tested organisms.

KEYWORDS:

• Mn₂O₃ nanoparticles
• water treatment
• antimicrobial
• adsorption of dye

Disclosure statement

No potential conflict of interest was reported by the author(s).