摘要：The ultrasonic and electrochemical combination oxidation technology was used to treat the acid wastewater containing arsenic in this work. To clarify the oxidation process of As(III) to As(V) in the anode region under the electrolysis and ultrasonic coupling, the oxidation process of As(III) under different influence factors (time/electrolysis voltage/arsenic concentration/ultrasonic power) was studied in a sulphuric acid-arsenic mixture system. The results show that trivalent arsenic oxidation efficiency can be increased when ultrasound is added in the process of electrolysis. The oxidation rate of trivalent arsenic is 25.49% higher than that produced by simple electrolysis when the electrolytic time is 120 min. The increase of electrolysis voltage can increase the oxidation efficiency of arsenic when the voltage is less than 6V. Below 1.1540g/L, the increase of arsenic concentration can promote the oxidation of As(III). The increase of ultrasonic power can promote the oxidation of As(III). However, the excessive ultrasonic power will cause the problem of acoustic shielding, resulting in excessive energy consumption and other problems. As a result, the oxidation efficiency of arsenic decreases.
