Synthesis of flower-like manganese wad and its decolorization performance for azo dye Congo red

Abstract

Flower-like manganese wad(MW) with high activity was synthesized via ultrasonic-assisted redox reaction of sole manganese salt MnO₄ ⁻. MW was characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM) and X-ray photoelectron spectroscopy(XPS). The experimental results indicate that the maximum decolorization rate of Congo red(CR) reached above 95% within 15 min in a wide pH range from 2.0 to 6.0. Results also show that MW has excellent decolorization performance for azo dye CR which implies potential application for removing dye pollutants from industrial effluents.

Keywords

Manganese wad / Ultrasonic synthesis / Congo red / Decolorization

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