关键词: 全氟丁酸, 超声波, 动力学, 降解

Abstract:

The feasibility of perfluorobutyric acid (PFBA）degradation by ultrasound irradiation was investigated and the influential factors such as ultrasonic frequency, initial PFBA concentration, sorts of saturated gas and reaction temperature were also evaluated.The experimental results showed that PFBA degradation followed the apparent pseudo-first order kinetic reaction.The sonolysis was completed over a range of frequency from 20 kHz to 1060 kHz at the initial PFBA concentration of 0.47×10^-6  mol·L^-1. However, the PFBA degradation rate constants had an apparent maximum at 610 kHz.Under the 610 kHz ultrasound irradiation, the initial PFBA concentration and the sorts of saturated gas affected greatly the PFBA degradation, and the reaction temperature had a slight effect on the PFBA degradation.In addition, the PFBA degradation in the manufacture wastewater was also evaluated under 610 kHz ultrasound.

Key words: 全氟丁酸, 超声波, 动力学, 降解