Rapid Fenton-like degradation of methyl orange by ultrasonically dispersed nano-metallic particles

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This study investigates methyl orange (MO) degradation by an ultrasonically dispersed nano-metallic particle (NMP) assisted advanced Fenton process.The NMPs were synthesized from the leachate of automobile-shredder residue.X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy were performed for the prepared NMPs.Various parameters, such as the effects of the NMP dosage, the pH value of the solution, the initial concentration of MO, and the amount of H2O2 on the degradation efficiency of MO were studied.The MO degradation efficiency could be increased by approximately 100% by increasing the dosages of the NMPs and H2O2 to certain limits, after which in both cases the degradation efficiency was reduced when an excess amount was added.The MO degradation efficiency was found to be 100% at pH 2.0 and 2.5 with the 10 mg/L of initial concentration of the MO.The degradation of MO by ultrasonically dispersed NMPs was appropriate with the pseudo-first-order kinetics.