Abstract:

The Ni-Mo-Zr heteropoly salt with Keggin structure has been hydrothermally synthesized and characterized by IR and XRD。Properties of ultrasonic degradation was investigation by the acidic-green B (AGB)dye used as the objective compound, and the influence factors on the ultrasonic degradation efficiency, such as the amount of the heteropoly salt, the initial concentration and the pH value of the acidic-green B dye wastewater, were explored.The results showed that the Ni-Mo-Zr heteropoly salt newly synthesized was Keggin structure. When the amount of the heteropoly salt was 0.8 g/L ,the initial concentration of the dye wastewater was 10 mg/L and the initial pH value of the wastewater was 5.0, ultrasonic irradiation 60min with 40KHz, the degradation rate was optimum and up to 90.2%. After dynamics analysed, the degradation reaction was accord with the first order dynamics model, and the degradation rate was decreased with the increasing of the initial concentration of the acidic-green B.

Key words: Ni-Mo-Zr, Keggin structure, heteropoly salt, ultrasonic degradation, acidic-green B, wastewater treatment